High-risk pregnancies — MCQs

Q: Which is correct about ABO and Rh incompatibility leading to Erythroblastosis fetalis?

Cytotoxic. ***Cytotoxic*** - **Erythroblastosis fetalis** involves maternal antibodies (IgG) crossing the placenta and binding to fetal red blood cell antigens, leading to **complement-mediated lysis** of fetal red blood cells. - This is a classic example of a **Type II hypersensitivity reaction**, characterized by antibody-mediated cell destruction. *Cell mediated hypersensitivity* - This refers to **Type IV hypersensitivity reactions**, which involve T lymphocytes and macrophages, not antibodies. - Examples include **contact dermatitis** and **tuberculosis skin tests**. *Immune complex* - This describes **Type III hypersensitivity reactions**, where antigen-antibody complexes form and deposit in tissues, leading to inflammation. - Conditions like **serum sickness** and **lupus nephritis** are examples of immune complex diseases. *Antigen-antibody reaction* - While present, this option is too broad; all hypersensitivity reactions involve some form of antigen-antibody (or antigen-T cell) interaction. - It does not specifically describe the **mechanisms of tissue damage** or the **type of hypersensitivity** involved in erythroblastosis fetalis.

Q: A USG (ultrasound) shows two babies, one of whom appears to be one month older than the other. What is the term for this condition?

Twin-to-twin transfusion syndrome. ***Twin-to-twin transfusion syndrome*** - The observation of one baby appearing a month older than the other on ultrasound, particularly in a twin pregnancy, is highly suggestive of **twin-to-twin transfusion syndrome (TTTS)**, where there is an unequal sharing of blood between the twins. - This imbalance leads to one twin (the recipient) becoming larger and plethoric, while the other (the donor) becomes smaller and anemic, creating a noticeable size discrepancy, inaccurately noted as an "older" twin. *Superfetation* - **Superfetation** is the rare phenomenon of a second, new pregnancy occurring during an existing pregnancy, resulting in two fetuses of different gestational ages. - While it results in fetuses of different ages, it specifically refers to conception at different times, which is distinct from the described unequal growth within a single multiple pregnancy. *Superfecundation* - **Superfecundation** refers to the fertilization of two or more ova from the same ovulatory cycle by sperm from different acts of coitus or from different fathers. - It results in twins (or multiples) conceived at roughly the same time, but by different sperm, and does not explain a significant age or size discrepancy between the fetuses. *Dichorionic diamniotic twins* - **Dichorionic diamniotic (DCDA) twins** are the most common type of twins, each having their own placenta and amniotic sac. - While they are two separate pregnancies, this term primarily describes the placental and amniotic sac arrangement and does not inherently explain a significant size discrepancy or "age" difference between the twins without an underlying complication like TTTS.

Q: A 27 -week pregnant woman with a fetus diagnosed with congenital anomalies is considering a Medical Termination of Pregnancy (MTP). Whose presence is not required for the authorization of MTP in this case?

B. Lawyer. **B. Lawyer** - The **Medical Termination of Pregnancy Act (MTP Act)** in India specifies the medical professionals required for MTP authorization. A lawyer's presence is not mandated for this medical decision. - Legal authorization involves medical personnel and, in certain cases, a **Medical Board**, but not legal professionals directly in the authorization process. *A. Obstetrician* - An **obstetrician** or gynecologist is a medical expert specializing in pregnancy and childbirth, making their presence crucial for assessing the patient's and fetal condition. - The **MTP Act** requires the opinion of at least two registered medical practitioners, especially for pregnancies beyond 20 weeks, making an obstetrician essential. *C. Pediatrician* - In cases of **fetal anomalies**, a **pediatrician** (or a neonatologist) is highly likely to be part of the Medical Board formed to evaluate the anomaly and assess the prognosis for the child. - Their expertise helps in understanding the **severity and potential outcomes** of the congenital anomaly, informing the MTP decision. *D. Sonologist* - A **sonologist** (radiologist performing ultrasound) is critical for accurately diagnosing and detailing the **congenital anomalies** through imaging. - Their report provides essential **diagnostic information** that forms the basis for the MTP decision, especially in cases where anomalies are the primary concern.

Q: A 32-year-old female in late pregnancy presents with seizures and high blood pressure. She is diagnosed with eclampsia and started on magnesium sulfate therapy. As part of her management, certain parameters require close monitoring to prevent magnesium toxicity. Which of the following is the MOST important parameter to monitor during magnesium sulfate therapy in this patient?

Serum magnesium levels. ***Serum magnesium levels*** - While clinical signs are crucial, direct measurement of **serum magnesium levels** provides the most accurate and objective assessment of magnesium load and toxicity risk. - Therapeutic ranges are well-defined (4-7 mEq/L or 1.5-3.0 mmol/L), and levels above this indicate increasing toxicity risk, guiding prompt intervention. *Urine output* - **Adequate renal function** is essential for magnesium excretion, so decreased urine output can predispose to toxicity. - However, urine output is an indirect measure and does not precisely reflect the immediate magnesium concentration or neurological effects. *Deep tendon reflexes* - **Loss of deep tendon reflexes** (e.g., patellar reflex) is an early and important clinical sign of magnesium toxicity. - While crucial for clinical assessment, it's a subjective finding that may lag behind dangerously high serum levels. *Respiratory rate* - **Respiratory depression** is a severe and life-threatening manifestation of magnesium toxicity, indicating very high serum levels. - Monitoring respiratory rate is essential, but it's a late sign of toxicity, and waiting for it to decrease means the patient is already significantly over-magnesemic.

Q: A woman at 8 weeks of gestation is diagnosed with hyperthyroidism. Which of the following is the most appropriate treatment option?

Propylthiouracil. ***Propylthiouracil*** - **Propylthiouracil (PTU)** is the preferred treatment for hyperthyroidism in the **first trimester** of pregnancy due to a lower risk of teratogenic effects compared to methimazole. - While PTU carries a risk of **liver toxicity**, its use is generally favored in early pregnancy to avoid the more severe potential fetal abnormalities associated with other antithyroid drugs during this critical developmental period. *Methimazole* - **Methimazole** is associated with a specific pattern of birth defects, including **aplasia cutis congenita** (scalp defects) and **esophageal/choanal atresia**, when used during the first trimester. - It is generally preferred in the **second and third trimesters** due to a lower risk of maternal hepatotoxicity compared to PTU. *Carbimazole* - **Carbimazole** is a **prodrug** that is metabolized to methimazole; therefore, it carries the same teratogenic risks as methimazole in the first trimester. - Its use during early pregnancy is generally avoided for the same reasons as methimazole. *Radioactive iodine* - **Radioactive iodine (RAI)** is **contraindicated** in pregnancy because it crosses the placenta and can cause **fetal hypothyroidism** and irreversible destruction of the fetal thyroid gland. - It is an effective treatment for hyperthyroidism outside of pregnancy but is never used during gestation.

Q: A teenage girl presents with a history of amenorrhea. Local examination is shown in the image. What karyotype analysis would you consider for further evaluation?

45 XO. ***45 XO*** - The image shows a **webbed neck** and **short stature** (suggested by the overall body proportions typically associated with Ullrich-Turner Syndrome), alongside primary amenorrhea, which are classic features of **Turner Syndrome**. - **Turner Syndrome** is a chromosomal disorder characterized by the absence of all or part of one X chromosome in females, resulting in a **45, XO karyotype**. *46 XY* - This karyotype indicates a **phenotypic male** with normal male chromosomal constitution. - Individuals with this karyotype would not typically present with **primary amenorrhea** as they do not have a uterus. *46 XX* - This is the **normal female karyotype**, and while a female with this karyotype could experience amenorrhea (e.g., due to Asherman's syndrome or PCOS), the physical features associated with the image (like webbed neck) are not consistent. - This option does not explain the **physical stigmata** often seen in genetic causes of primary amenorrhea, such as in Turner syndrome. *47 XXY* - This karyotype is characteristic of **Klinefelter Syndrome**, which affects males and is associated with hypogonadism and gynecomastia. - It would not be found in a female patient presenting with **amenorrhea** and the physical features shown in the image. *47 XXX* - This karyotype represents **Triple X Syndrome** (Trisomy X), which affects females and typically presents with **normal female appearance** and often normal fertility. - While some individuals may have menstrual irregularities, the **distinctive physical features** shown in the image (webbed neck, short stature) are not characteristic of Triple X syndrome, which usually lacks specific dysmorphic features.

Q: A 30-year-old woman presents with a history of pelvic pain and infertility. A transvaginal ultrasound is performed, and the image provided shows a tubular, fluid-filled structure with thin walls. There is no evidence of solid components or internal septations. What is the most likely diagnosis?

Hydrosalpinx. ***Hydrosalpinx*** - The ultrasound finding of a **tubular, fluid-filled structure with thin walls** and no solid components or septations is highly characteristic of a **hydrosalpinx**, which is a blocked, fluid-filled fallopian tube. - **Pelvic pain** and **infertility** in a young woman are classic clinical presentations associated with hydrosalpinx, often resulting from previous pelvic inflammatory disease. *Ovarian cyst* - While ovarian cysts are fluid-filled, they typically appear as **rounded or oval structures within or adjacent to the ovary**, not distinctively tubular. - They can cause pain but are not typically associated with a "tubular" morphology on ultrasound. *Ectopic pregnancy* - An ectopic pregnancy would typically present with a **gestational sac** (with or without a fetal pole or yolk sac) outside the uterus, often in the fallopian tube. - While it can be tubular, it usually shows more complex internal echoes representing pregnancy components, and the clinical picture would involve a **positive pregnancy test** and often acute, unilateral pain. *Endometrioma* - An endometrioma is a type of ovarian cyst filled with **endometrial tissue**, often appearing on ultrasound as a **"ground glass" or "chocolate cyst"** with internal echoes due to old blood. - It would not typically present as a thin-walled, anechoic (purely fluid-filled) tubular structure. *Tubo-ovarian abscess* - A tubo-ovarian abscess (TOA) is a **complex inflammatory mass** that typically appears on ultrasound as a **thick-walled, complex structure with internal echoes, septations, or debris**. - TOA patients usually present with **acute symptoms including fever, elevated white blood cell count**, and severe pelvic pain, rather than the chronic presentation described here. - The ultrasound description of thin walls and no solid components makes TOA unlikely.

Q: A mother brings her daughter with short stature, webbed neck, and other physical features. What is the most likely finding on ultrasound?

Streak ovaries with small uterus. ***Streak ovaries with small uterus*** - The constellation of **short stature** and **webbed neck** is highly suggestive of **Turner syndrome (45,X0)**. - A characteristic feature of Turner syndrome is **gonadal dysgenesis**, which manifests as **streak ovaries** and a **small uterus** due to the absence of normal ovarian development. *Hepatomegaly with altered echotexture* - This finding is more indicative of **liver disease** or metabolic disorders, which are not primary features of Turner syndrome. - While Turner syndrome can be associated with various health issues, **hepatomegaly** is not a common or defining ultrasonographic finding. *Echo showing tricuspid stenosis* - **Cardiac abnormalities** are common in Turner syndrome, but the most frequent ones are **bicuspid aortic valve** and **coarctation of the aorta**, not typically **tricuspid stenosis**. - **Tricuspid stenosis** is a rare congenital heart defect and not specifically associated with Turner syndrome. *Single kidney* - **Renal anomalies**, such as a **horseshoe kidney** or **renal agenesis**, can occur in Turner syndrome. - However, the description of **single kidney** is less specific than **streak ovaries** in identifying the most likely finding given the presented clinical features of short stature and webbed neck.

Q: A 23-year-old primigravida lives in the same house as her school-going nephew, who contracted a varicella infection. The woman approached the medical center and was tested for varicella antibodies, with a negative result. Which of the following statements are true?

She is susceptible to chickenpox. ***She is susceptible to chickenpox*** - A **negative varicella antibody test** indicates she has not previously been exposed to the **varicella-zoster virus (VZV)** and therefore lacks protective immunity. - As a **primigravida** living with an actively infected individual, she is at high risk of contracting primary chickenpox due to her susceptible status. *She is susceptible to zoster* - **Zoster (shingles)** is caused by the **reactivation of latent VZV** from a previous chickenpox infection, which she has not had. - Without a prior chickenpox infection, there is no dormant virus to reactivate, so susceptibility to zoster is not applicable. *She is immune to chickenpox* - **Immunity to chickenpox** is conferred by prior infection or vaccination, which would result in a **positive varicella antibody test**. - Her **negative antibody test** directly refutes the claim of immunity. *She is immune to zoster* - **Immunity to zoster** is not a primary concept; rather, zoster develops from the reactivation of latent VZV after a primary infection with chickenpox. - Since she is susceptible to chickenpox, she cannot be immune to zoster, which requires prior infection.

Q: A 36-week pregnant woman with mitral stenosis has been on warfarin for anticoagulation. What is the most appropriate next step in her management?

Shift to Low Molecular Weight (LMW) Heparin. ***Shift to Low Molecular Weight (LMW) Heparin*** - At 36 weeks gestation, **warfarin is contraindicated** due to its teratogenic effects and increased risk of **fetal bleeding**, especially during labor and delivery. - **LMW heparin** does not cross the placenta, making it a safer option for both mother and fetus in late pregnancy, and it can be discontinued prior to delivery to reduce bleeding risk. *Continue Warfarin* - Continuing warfarin at 36 weeks could lead to **fetal warfarin syndrome** if exposure occurred earlier, and significantly increases the risk of **fetal intracranial hemorrhage** during labor. - Warfarin has a narrow therapeutic window and requires close monitoring, making it less practical for ensuring fetal safety during an unpredictable labor and delivery. *Aspirin + Heparin* - While heparin is appropriate, the addition of **aspirin** to anticoagulation in a patient already on warfarin for mitral stenosis does not provide significant additional benefit and could **increase bleeding risk**. - **Unfractionated heparin (UFH)** is generally preferred over LMWH for patients requiring rapid reversal or close monitoring around delivery. *Switch to Aspirin* - **Aspirin alone is insufficient** for anticoagulation in a pregnant woman with mitral stenosis who has been on warfarin, as it does not adequately prevent thromboembolic events. - Mitral stenosis carries a high risk of **thrombus formation** and systemic embolization, necessitating more potent anticoagulation than aspirin provides.

A 32-year-old female in late pregnancy presents with seizures and high blood pressure. She is diagnosed with eclampsia and started on magnesium sulfate therapy. As part of her management, certain parameters require close monitoring to prevent magnesium toxicity. Which of the following is the MOST important parameter to monitor during magnesium sulfate therapy in this patient?

A woman at 8 weeks of gestation is diagnosed with hyperthyroidism. Which of the following is the most appropriate treatment option?

A teenage girl presents with a history of amenorrhea. Local examination is shown in the image. What karyotype analysis would you consider for further evaluation?

A 30-year-old woman presents with a history of pelvic pain and infertility. A transvaginal ultrasound is performed, and the image provided shows a tubular, fluid-filled structure with thin walls. There is no evidence of solid components or internal septations. What is the most likely diagnosis?

A mother brings her daughter with short stature, webbed neck, and other physical features. What is the most likely finding on ultrasound?

A 23-year-old primigravida lives in the same house as her school-going nephew, who contracted a varicella infection. The woman approached the medical center and was tested for varicella antibodies, with a negative result. Which of the following statements are true?

Q10

A 36-week pregnant woman with mitral stenosis has been on warfarin for anticoagulation. What is the most appropriate next step in her management?

High-risk pregnancies US Medical PG Practice Questions and MCQs

Question 1: Which is correct about ABO and Rh incompatibility leading to Erythroblastosis fetalis?

A. Cell mediated hypersensitivity
B. Immune complex
C. Antigen-antibody reaction
D. Cytotoxic (Correct Answer)

Explanation: ***Cytotoxic*** - **Erythroblastosis fetalis** involves maternal antibodies (IgG) crossing the placenta and binding to fetal red blood cell antigens, leading to **complement-mediated lysis** of fetal red blood cells. - This is a classic example of a **Type II hypersensitivity reaction**, characterized by antibody-mediated cell destruction. *Cell mediated hypersensitivity* - This refers to **Type IV hypersensitivity reactions**, which involve T lymphocytes and macrophages, not antibodies. - Examples include **contact dermatitis** and **tuberculosis skin tests**. *Immune complex* - This describes **Type III hypersensitivity reactions**, where antigen-antibody complexes form and deposit in tissues, leading to inflammation. - Conditions like **serum sickness** and **lupus nephritis** are examples of immune complex diseases. *Antigen-antibody reaction* - While present, this option is too broad; all hypersensitivity reactions involve some form of antigen-antibody (or antigen-T cell) interaction. - It does not specifically describe the **mechanisms of tissue damage** or the **type of hypersensitivity** involved in erythroblastosis fetalis.

Question 2: A USG (ultrasound) shows two babies, one of whom appears to be one month older than the other. What is the term for this condition?

A. Superfetation
B. Superfecundation
C. Twin-to-twin transfusion syndrome (Correct Answer)
D. Dichorionic diamniotic twins

Explanation: ***Twin-to-twin transfusion syndrome*** - The observation of one baby appearing a month older than the other on ultrasound, particularly in a twin pregnancy, is highly suggestive of **twin-to-twin transfusion syndrome (TTTS)**, where there is an unequal sharing of blood between the twins. - This imbalance leads to one twin (the recipient) becoming larger and plethoric, while the other (the donor) becomes smaller and anemic, creating a noticeable size discrepancy, inaccurately noted as an "older" twin. *Superfetation* - **Superfetation** is the rare phenomenon of a second, new pregnancy occurring during an existing pregnancy, resulting in two fetuses of different gestational ages. - While it results in fetuses of different ages, it specifically refers to conception at different times, which is distinct from the described unequal growth within a single multiple pregnancy. *Superfecundation* - **Superfecundation** refers to the fertilization of two or more ova from the same ovulatory cycle by sperm from different acts of coitus or from different fathers. - It results in twins (or multiples) conceived at roughly the same time, but by different sperm, and does not explain a significant age or size discrepancy between the fetuses. *Dichorionic diamniotic twins* - **Dichorionic diamniotic (DCDA) twins** are the most common type of twins, each having their own placenta and amniotic sac. - While they are two separate pregnancies, this term primarily describes the placental and amniotic sac arrangement and does not inherently explain a significant size discrepancy or "age" difference between the twins without an underlying complication like TTTS.

Question 3: A 27 -week pregnant woman with a fetus diagnosed with congenital anomalies is considering a Medical Termination of Pregnancy (MTP). Whose presence is not required for the authorization of MTP in this case?

A. A. Obstetrician
B. B. Lawyer (Correct Answer)
C. C. Pediatrician
D. D. Sonologist

Explanation: **B. Lawyer** - The **Medical Termination of Pregnancy Act (MTP Act)** in India specifies the medical professionals required for MTP authorization. A lawyer's presence is not mandated for this medical decision. - Legal authorization involves medical personnel and, in certain cases, a **Medical Board**, but not legal professionals directly in the authorization process. *A. Obstetrician* - An **obstetrician** or gynecologist is a medical expert specializing in pregnancy and childbirth, making their presence crucial for assessing the patient's and fetal condition. - The **MTP Act** requires the opinion of at least two registered medical practitioners, especially for pregnancies beyond 20 weeks, making an obstetrician essential. *C. Pediatrician* - In cases of **fetal anomalies**, a **pediatrician** (or a neonatologist) is highly likely to be part of the Medical Board formed to evaluate the anomaly and assess the prognosis for the child. - Their expertise helps in understanding the **severity and potential outcomes** of the congenital anomaly, informing the MTP decision. *D. Sonologist* - A **sonologist** (radiologist performing ultrasound) is critical for accurately diagnosing and detailing the **congenital anomalies** through imaging. - Their report provides essential **diagnostic information** that forms the basis for the MTP decision, especially in cases where anomalies are the primary concern.

Question 4: A 32-year-old female in late pregnancy presents with seizures and high blood pressure. She is diagnosed with eclampsia and started on magnesium sulfate therapy. As part of her management, certain parameters require close monitoring to prevent magnesium toxicity. Which of the following is the MOST important parameter to monitor during magnesium sulfate therapy in this patient?

A. Urine output
B. Deep tendon reflexes
C. Serum magnesium levels (Correct Answer)
D. Respiratory rate

Explanation: ***Serum magnesium levels*** - While clinical signs are crucial, direct measurement of **serum magnesium levels** provides the most accurate and objective assessment of magnesium load and toxicity risk. - Therapeutic ranges are well-defined (4-7 mEq/L or 1.5-3.0 mmol/L), and levels above this indicate increasing toxicity risk, guiding prompt intervention. *Urine output* - **Adequate renal function** is essential for magnesium excretion, so decreased urine output can predispose to toxicity. - However, urine output is an indirect measure and does not precisely reflect the immediate magnesium concentration or neurological effects. *Deep tendon reflexes* - **Loss of deep tendon reflexes** (e.g., patellar reflex) is an early and important clinical sign of magnesium toxicity. - While crucial for clinical assessment, it's a subjective finding that may lag behind dangerously high serum levels. *Respiratory rate* - **Respiratory depression** is a severe and life-threatening manifestation of magnesium toxicity, indicating very high serum levels. - Monitoring respiratory rate is essential, but it's a late sign of toxicity, and waiting for it to decrease means the patient is already significantly over-magnesemic.

Question 5: A woman at 8 weeks of gestation is diagnosed with hyperthyroidism. Which of the following is the most appropriate treatment option?

A. Methimazole
B. Carbimazole
C. Propylthiouracil (Correct Answer)
D. Radioactive iodine

Explanation: ***Propylthiouracil*** - **Propylthiouracil (PTU)** is the preferred treatment for hyperthyroidism in the **first trimester** of pregnancy due to a lower risk of teratogenic effects compared to methimazole. - While PTU carries a risk of **liver toxicity**, its use is generally favored in early pregnancy to avoid the more severe potential fetal abnormalities associated with other antithyroid drugs during this critical developmental period. *Methimazole* - **Methimazole** is associated with a specific pattern of birth defects, including **aplasia cutis congenita** (scalp defects) and **esophageal/choanal atresia**, when used during the first trimester. - It is generally preferred in the **second and third trimesters** due to a lower risk of maternal hepatotoxicity compared to PTU. *Carbimazole* - **Carbimazole** is a **prodrug** that is metabolized to methimazole; therefore, it carries the same teratogenic risks as methimazole in the first trimester. - Its use during early pregnancy is generally avoided for the same reasons as methimazole. *Radioactive iodine* - **Radioactive iodine (RAI)** is **contraindicated** in pregnancy because it crosses the placenta and can cause **fetal hypothyroidism** and irreversible destruction of the fetal thyroid gland. - It is an effective treatment for hyperthyroidism outside of pregnancy but is never used during gestation.

Question 6: A teenage girl presents with a history of amenorrhea. Local examination is shown in the image. What karyotype analysis would you consider for further evaluation?

A. 46 XY
B. 46 XX
C. 45 XO (Correct Answer)
D. 47 XXY
E. 47 XXX

Explanation: ***45 XO*** - The image shows a **webbed neck** and **short stature** (suggested by the overall body proportions typically associated with Ullrich-Turner Syndrome), alongside primary amenorrhea, which are classic features of **Turner Syndrome**. - **Turner Syndrome** is a chromosomal disorder characterized by the absence of all or part of one X chromosome in females, resulting in a **45, XO karyotype**. *46 XY* - This karyotype indicates a **phenotypic male** with normal male chromosomal constitution. - Individuals with this karyotype would not typically present with **primary amenorrhea** as they do not have a uterus. *46 XX* - This is the **normal female karyotype**, and while a female with this karyotype could experience amenorrhea (e.g., due to Asherman's syndrome or PCOS), the physical features associated with the image (like webbed neck) are not consistent. - This option does not explain the **physical stigmata** often seen in genetic causes of primary amenorrhea, such as in Turner syndrome. *47 XXY* - This karyotype is characteristic of **Klinefelter Syndrome**, which affects males and is associated with hypogonadism and gynecomastia. - It would not be found in a female patient presenting with **amenorrhea** and the physical features shown in the image. *47 XXX* - This karyotype represents **Triple X Syndrome** (Trisomy X), which affects females and typically presents with **normal female appearance** and often normal fertility. - While some individuals may have menstrual irregularities, the **distinctive physical features** shown in the image (webbed neck, short stature) are not characteristic of Triple X syndrome, which usually lacks specific dysmorphic features.

Question 7: A 30-year-old woman presents with a history of pelvic pain and infertility. A transvaginal ultrasound is performed, and the image provided shows a tubular, fluid-filled structure with thin walls. There is no evidence of solid components or internal septations. What is the most likely diagnosis?

A. Ovarian cyst
B. Ectopic pregnancy
C. Hydrosalpinx (Correct Answer)
D. Endometrioma
E. Tubo-ovarian abscess

Explanation: ***Hydrosalpinx*** - The ultrasound finding of a **tubular, fluid-filled structure with thin walls** and no solid components or septations is highly characteristic of a **hydrosalpinx**, which is a blocked, fluid-filled fallopian tube. - **Pelvic pain** and **infertility** in a young woman are classic clinical presentations associated with hydrosalpinx, often resulting from previous pelvic inflammatory disease. *Ovarian cyst* - While ovarian cysts are fluid-filled, they typically appear as **rounded or oval structures within or adjacent to the ovary**, not distinctively tubular. - They can cause pain but are not typically associated with a "tubular" morphology on ultrasound. *Ectopic pregnancy* - An ectopic pregnancy would typically present with a **gestational sac** (with or without a fetal pole or yolk sac) outside the uterus, often in the fallopian tube. - While it can be tubular, it usually shows more complex internal echoes representing pregnancy components, and the clinical picture would involve a **positive pregnancy test** and often acute, unilateral pain. *Endometrioma* - An endometrioma is a type of ovarian cyst filled with **endometrial tissue**, often appearing on ultrasound as a **"ground glass" or "chocolate cyst"** with internal echoes due to old blood. - It would not typically present as a thin-walled, anechoic (purely fluid-filled) tubular structure. *Tubo-ovarian abscess* - A tubo-ovarian abscess (TOA) is a **complex inflammatory mass** that typically appears on ultrasound as a **thick-walled, complex structure with internal echoes, septations, or debris**. - TOA patients usually present with **acute symptoms including fever, elevated white blood cell count**, and severe pelvic pain, rather than the chronic presentation described here. - The ultrasound description of thin walls and no solid components makes TOA unlikely.

Question 8: A mother brings her daughter with short stature, webbed neck, and other physical features. What is the most likely finding on ultrasound?

A. Hepatomegaly with altered echotexture
B. Echo showing tricuspid stenosis
C. Streak ovaries with small uterus (Correct Answer)
D. Single kidney

Explanation: ***Streak ovaries with small uterus*** - The constellation of **short stature** and **webbed neck** is highly suggestive of **Turner syndrome (45,X0)**. - A characteristic feature of Turner syndrome is **gonadal dysgenesis**, which manifests as **streak ovaries** and a **small uterus** due to the absence of normal ovarian development. *Hepatomegaly with altered echotexture* - This finding is more indicative of **liver disease** or metabolic disorders, which are not primary features of Turner syndrome. - While Turner syndrome can be associated with various health issues, **hepatomegaly** is not a common or defining ultrasonographic finding. *Echo showing tricuspid stenosis* - **Cardiac abnormalities** are common in Turner syndrome, but the most frequent ones are **bicuspid aortic valve** and **coarctation of the aorta**, not typically **tricuspid stenosis**. - **Tricuspid stenosis** is a rare congenital heart defect and not specifically associated with Turner syndrome. *Single kidney* - **Renal anomalies**, such as a **horseshoe kidney** or **renal agenesis**, can occur in Turner syndrome. - However, the description of **single kidney** is less specific than **streak ovaries** in identifying the most likely finding given the presented clinical features of short stature and webbed neck.

Question 9: A 23-year-old primigravida lives in the same house as her school-going nephew, who contracted a varicella infection. The woman approached the medical center and was tested for varicella antibodies, with a negative result. Which of the following statements are true?

A. She is susceptible to zoster
B. She is immune to chickenpox
C. She is susceptible to chickenpox (Correct Answer)
D. She is immune to zoster

Explanation: ***She is susceptible to chickenpox*** - A **negative varicella antibody test** indicates she has not previously been exposed to the **varicella-zoster virus (VZV)** and therefore lacks protective immunity. - As a **primigravida** living with an actively infected individual, she is at high risk of contracting primary chickenpox due to her susceptible status. *She is susceptible to zoster* - **Zoster (shingles)** is caused by the **reactivation of latent VZV** from a previous chickenpox infection, which she has not had. - Without a prior chickenpox infection, there is no dormant virus to reactivate, so susceptibility to zoster is not applicable. *She is immune to chickenpox* - **Immunity to chickenpox** is conferred by prior infection or vaccination, which would result in a **positive varicella antibody test**. - Her **negative antibody test** directly refutes the claim of immunity. *She is immune to zoster* - **Immunity to zoster** is not a primary concept; rather, zoster develops from the reactivation of latent VZV after a primary infection with chickenpox. - Since she is susceptible to chickenpox, she cannot be immune to zoster, which requires prior infection.

Question 10: A 36-week pregnant woman with mitral stenosis has been on warfarin for anticoagulation. What is the most appropriate next step in her management?

A. Continue Warfarin
B. Aspirin + Heparin
C. Shift to Low Molecular Weight (LMW) Heparin (Correct Answer)
D. Switch to Aspirin

Explanation: ***Shift to Low Molecular Weight (LMW) Heparin*** - At 36 weeks gestation, **warfarin is contraindicated** due to its teratogenic effects and increased risk of **fetal bleeding**, especially during labor and delivery. - **LMW heparin** does not cross the placenta, making it a safer option for both mother and fetus in late pregnancy, and it can be discontinued prior to delivery to reduce bleeding risk. *Continue Warfarin* - Continuing warfarin at 36 weeks could lead to **fetal warfarin syndrome** if exposure occurred earlier, and significantly increases the risk of **fetal intracranial hemorrhage** during labor. - Warfarin has a narrow therapeutic window and requires close monitoring, making it less practical for ensuring fetal safety during an unpredictable labor and delivery. *Aspirin + Heparin* - While heparin is appropriate, the addition of **aspirin** to anticoagulation in a patient already on warfarin for mitral stenosis does not provide significant additional benefit and could **increase bleeding risk**. - **Unfractionated heparin (UFH)** is generally preferred over LMWH for patients requiring rapid reversal or close monitoring around delivery. *Switch to Aspirin* - **Aspirin alone is insufficient** for anticoagulation in a pregnant woman with mitral stenosis who has been on warfarin, as it does not adequately prevent thromboembolic events. - Mitral stenosis carries a high risk of **thrombus formation** and systemic embolization, necessitating more potent anticoagulation than aspirin provides.

Practice by Chapter

Advanced maternal age

Practice Questions

Multiple gestation management

Practice Questions

Pregestational diabetes

Practice Questions

Chronic hypertension in pregnancy

Practice Questions

Thyroid disorders in pregnancy

Practice Questions

Autoimmune disorders in pregnancy

Practice Questions

Cardiac disease in pregnancy

Practice Questions

Renal disease in pregnancy

Practice Questions

Obesity in pregnancy

Practice Questions

Substance use in pregnancy

Practice Questions

Prior preterm birth management

Practice Questions

Prior cesarean delivery management

Practice Questions

Maternal cancer in pregnancy

Practice Questions

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free