A 29-year-old G2P2 female gives birth to a healthy baby boy at 39 weeks of gestation via vaginal delivery. Immediately after the delivery of the placenta, she experiences profuse vaginal hemorrhage. Her prior birthing history is notable for an emergency cesarean section during her first pregnancy. She did not receive any prenatal care during either pregnancy. Her past medical history is notable for obesity and diabetes mellitus, which is well controlled on metformin. Her temperature is 99.0°F (37.2°C), blood pressure is 95/50 mmHg, pulse is 125/min, and respirations are 22/min. On physical examination, the patient is in moderate distress. Her extremities are pale, cool, and clammy. Capillary refill is delayed. Which of the following is the most likely cause of this patient’s bleeding?
Q2
29-year-old G2P2002 presents with foul-smelling lochia and fever. She is post-partum day three status-post cesarean section due to eclampsia. Her temperature is 101 F, and heart rate is 103. She denies chills. On physical exam, lower abdominal and uterine tenderness is present. Leukocytosis with left shift is seen in labs. Which of the following is the next best step in management?
Q3
A 27-year-old woman, gravida 3, para 2, at 41 weeks' gestation is admitted to the hospital in active labor. Her pregnancy has been uncomplicated. Both of her prior children were delivered by vaginal birth. She has a history of asthma. Current medications include iron and vitamin supplements. After a prolonged labor, she undergoes vaginal delivery. Shortly afterwards, she begins to have heavy vaginal bleeding with clots. Her temperature is 37.2°C (98.9°F), pulse is 90/min, respirations are 17/min, and blood pressure is 130/72 mm Hg. Examination shows a soft, enlarged, and boggy uterus on palpation. Laboratory studies show:
Hemoglobin 10.8 g/dL
Hematocrit 32.3%
Leukocyte Count 9,000/mm3
Platelet Count 140,000/mm3
Prothrombin time 14 seconds
Partial thromboplastin time 38 seconds
Her bleeding continues despite bimanual uterine massage and administration of oxytocin. Which of the following is the most appropriate next step in management?
Q4
Immediately following prolonged delivery of the placenta at 40 weeks gestation, a 32-year-old multiparous woman develops vaginal bleeding. Other than mild asthma, the patient’s pregnancy has been uncomplicated. She has attended many prenatal appointments and followed the physician's advice about screening for diseases, laboratory testing, diet, and exercise. Previous pregnancies were uncomplicated. She has no history of a serious illness. She is currently on intravenous infusion of oxytocin. Her temperature is 37.2°C (99.0°F), blood pressure is 108/60 mm Hg, pulse is 88/min, and respirations are 17/min. Uterine palpation reveals a soft enlarged fundus that extends above the umbilicus. Based on the assessment of the birth canal and placenta, which of the following options is the most appropriate initial step in patient management?
Q5
A 37-year-old woman, gravida 4, para 3, at 35 weeks' gestation is admitted to the hospital in active labor. Her three children were delivered by Cesarean section. One hour after vaginal delivery, the placenta is not delivered. Manual separation of the placenta leads to profuse vaginal bleeding. Her pulse is 122/min and blood pressure is 90/67 mm Hg. A firm, nontender uterine fundus is palpated at the level of the umbilicus. Hemoglobin is 8.3 g/dL and platelet count is 220,000/mm3. Activated partial thromboplastin time and prothrombin time are within normal limits. Which of the following is the most likely underlying mechanism of this patient's postpartum bleeding?
Q6
Five minutes after initiating a change of position and oxygen inhalation, the oxytocin infusion is discontinued. A repeat CTG that is done 10 minutes later shows recurrent variable decelerations and a total of 3 uterine contractions in 10 minutes. Which of the following is the most appropriate next step in management?
Q7
A 31-year-old G6P6 woman with a history of fibroids gives birth to twins via vaginal delivery. Her pregnancy was uneventful, and she reported having good prenatal care. Both placentas are delivered immediately after the birth. The patient continues to bleed significantly over the next 20 minutes. Her temperature is 97.0°F (36.1°C), blood pressure is 124/84 mmHg, pulse is 95/min, respirations are 16/min, and oxygen saturation is 98% on room air. Continued vaginal bleeding is noted. Which of the following is the most appropriate initial step in management?
Q8
A 30-year-old woman comes to the primary care physician because she has felt nauseous and fatigued for 3 weeks. Menses occur at irregular 24- to 33-day intervals and last for 4–6 days. Her last menstrual period was 7 weeks ago. Her temperature is 37°C (98.6°F), pulse is 95/min, and blood pressure is 100/70 mm Hg. Pelvic examination shows an enlarged uterus. Her serum β-hCG concentration is 96,000 mIU/mL (N < 5). An abdominal ultrasound is shown. Which of the following is the most likely diagnosis?
Q9
A 44-year-old G2P2 African American woman presents to her gynecologist for dysmenorrhea. She reports that for the past few months, she has been having severe pain during her menses. She also endorses menstrual bleeding that has been heavier than usual. The patient reports that her cycles are regular and occur every 30 days, and she denies both dyspareunia and spotting between her periods. Her last menstrual period was two weeks ago. In terms of her obstetric history, the patient had two uncomplicated pregnancies, and she had no difficulty becoming pregnant. She has never had an abnormal pap smear. Her past medical history is otherwise significant for hyperlipidemia and asthma. On physical exam, the patient’s uterus is tender, soft, and enlarged to the size of a pregnant uterus at 10 weeks of gestation. She is non-tender during vaginal exam, without cervical motion tenderness or adnexal masses. Her BMI is 24 kg/m2. A urine pregnancy test is negative.
Which of the following is the most likely diagnosis for this patient?
Q10
A 39-year-old woman, gravida 4, para 4, comes to the physician because of a 5-month history of painful, heavy menses. Menses previously occurred at regular 28-day intervals and lasted 3 days with normal flow. They now last 7–8 days and the flow is heavy with the passage of clots. Pelvic examination shows a tender, uniformly enlarged, flaccid uterus consistent in size with an 8-week gestation. A urine pregnancy test is negative. Which of the following is the most likely cause of this patient's findings?
Fourth stage of labor US Medical PG Practice Questions and MCQs
Question 1: A 29-year-old G2P2 female gives birth to a healthy baby boy at 39 weeks of gestation via vaginal delivery. Immediately after the delivery of the placenta, she experiences profuse vaginal hemorrhage. Her prior birthing history is notable for an emergency cesarean section during her first pregnancy. She did not receive any prenatal care during either pregnancy. Her past medical history is notable for obesity and diabetes mellitus, which is well controlled on metformin. Her temperature is 99.0°F (37.2°C), blood pressure is 95/50 mmHg, pulse is 125/min, and respirations are 22/min. On physical examination, the patient is in moderate distress. Her extremities are pale, cool, and clammy. Capillary refill is delayed. Which of the following is the most likely cause of this patient’s bleeding?
A. Chorionic villi invading into the myometrium
B. Placental implantation over internal cervical os
C. Chorionic villi attaching to the decidua basalis
D. Chorionic villi invading into the serosa
E. Chorionic villi attaching to the myometrium (Correct Answer)
Explanation: ***Chorionic villi attaching to the myometrium***
- This describes **placenta accreta**, where the **chorionic villi adhere directly to the myometrium** without invading beyond it. This condition is strongly associated with a history of **prior C-sections**, as the scar tissue increases the risk of abnormal placental implantation.
- The profuse hemorrhage immediately following placental delivery, despite the placenta being delivered, suggests a problem with normal placental separation from the uterine wall. **Placenta accreta** can lead to massive postpartum hemorrhage when the placenta attempts to separate, tearing the maternal vessels.
*Chorionic villi invading into the myometrium*
- This describes **placenta increta**, where the **chorionic villi invade deeper into the myometrium**. While also causing severe hemorrhage, the term "attaching to the myometrium" (accreta) is a more common and slightly less severe form often seen with prior C-sections.
- Both accreta and increta present similarly with hemorrhage, but accreta is the initial and most common form of abnormal adherence to the myometrium.
*Placental implantation over internal cervical os*
- This describes **placenta previa**, which is characterized by **painless vaginal bleeding** typically in the **second or third trimester**, before delivery.
- While a prior C-section is a risk factor for placenta previa, the hemorrhage in this case occurred *after* the delivery of the placenta, not before or during labor, ruling out active previa.
*Chorionic villi invading into the serosa*
- This describes **placenta percreta**, the most severe form where **chorionic villi invade through the myometrium and into the uterine serosa**, potentially involving adjacent organs.
- While it causes massive hemorrhage, "attaching to" or even "invading into" the myometrium (accreta/increta) are more probable, given the description, than invasion *through* to the serosa, though all are part of the placenta accreta spectrum.
*Chorionic villi invading beyond the serosa*
- This is an alternative description for **placenta percreta**, indicating invasion through the uterus and potentially into surrounding structures like the bladder.
- While this is a severe cause of postpartum hemorrhage, the provided option "Chorionic villi attaching to the myometrium" (placenta accreta) is the most common form of abnormally adherent placenta in the spectrum and is highly consistent with the patient's history of prior C-section and the clinical presentation of hemorrhage after placental delivery.
Question 2: 29-year-old G2P2002 presents with foul-smelling lochia and fever. She is post-partum day three status-post cesarean section due to eclampsia. Her temperature is 101 F, and heart rate is 103. She denies chills. On physical exam, lower abdominal and uterine tenderness is present. Leukocytosis with left shift is seen in labs. Which of the following is the next best step in management?
A. Endometrial culture
B. Intravenous clindamycin and gentamicin treatment (Correct Answer)
C. Prophylactic intravenous cefazolin treatment
D. Intramuscular cefotetan treatment
E. Blood culture
Explanation: **Intravenous clindamycin and gentamicin treatment**
* This patient presents with **fever**, **foul-smelling lochia**, **uterine tenderness**, and **leukocytosis with left shift** on postpartum day three after a cesarean section, which are classic signs of **postpartum endometritis**.
* The recommended first-line treatment for **postpartum endometritis** is **broad-spectrum intravenous antibiotics**, typically a combination of **clindamycin** and **gentamicin**, which covers the polymicrobial nature of the infection, including anaerobes and gram-negative rods.
*Endometrial culture*
* While useful for identifying specific pathogens, **endometrial cultures** are generally **not recommended prior to initiating treatment for postpartum endometritis** as the infection is typically polymicrobial, and treatment should be started empirically.
* **Contamination with normal vaginal flora** is a significant concern, making interpretation of cultures difficult and potentially delaying appropriate treatment.
*Prophylactic intravenous cefazolin treatment*
* **Cefazolin** is a first-generation cephalosporin often used for **surgical prophylaxis** before a cesarean section to prevent infection.
* This patient already has clear signs of an established **postpartum infection (endometritis)**, so prophylactic antibiotics are no longer appropriate; she requires therapeutic treatment.
*Intramuscular cefotetan treatment*
* **Cefotetan** is a second-generation cephalosporin with good coverage against some anaerobes and gram-negative bacteria.
* However, for established **postpartum endometritis**, especially after a cesarean section, **intravenous administration** of broad-spectrum antibiotics is preferred for faster therapeutic levels and better efficacy than intramuscular delivery.
*Blood culture*
* **Blood cultures** are important to rule out **bacteremia** or **sepsis**, especially in patients with high fever or signs of systemic illness.
* While an important diagnostic step, it is **not the *next best step in management*** for a patient with clear signs of endometritis; empirical antibiotic therapy should be initiated promptly while awaiting culture results.
Question 3: A 27-year-old woman, gravida 3, para 2, at 41 weeks' gestation is admitted to the hospital in active labor. Her pregnancy has been uncomplicated. Both of her prior children were delivered by vaginal birth. She has a history of asthma. Current medications include iron and vitamin supplements. After a prolonged labor, she undergoes vaginal delivery. Shortly afterwards, she begins to have heavy vaginal bleeding with clots. Her temperature is 37.2°C (98.9°F), pulse is 90/min, respirations are 17/min, and blood pressure is 130/72 mm Hg. Examination shows a soft, enlarged, and boggy uterus on palpation. Laboratory studies show:
Hemoglobin 10.8 g/dL
Hematocrit 32.3%
Leukocyte Count 9,000/mm3
Platelet Count 140,000/mm3
Prothrombin time 14 seconds
Partial thromboplastin time 38 seconds
Her bleeding continues despite bimanual uterine massage and administration of oxytocin. Which of the following is the most appropriate next step in management?
A. Administer methylergonovine (Correct Answer)
B. Transfuse blood
C. Perform hysterectomy
D. Administer carboprost tromethamine
E. Perform curettage
Explanation: ***Administer methylergonovine***
- The patient is likely experiencing **postpartum hemorrhage (PPH)** due to **uterine atony**, characterized by a soft, enlarged, and boggy uterus after delivery, with continued bleeding despite initial measures (massage, oxytocin).
- Given her history of **asthma**, carboprost tromethamine (prostaglandin F2-alpha) is **contraindicated** due to its potential to cause severe bronchospasm, making methylergonovine (an ergot alkaloid) the appropriate next uterotonic agent.
*Transfuse blood*
- While blood transfusions may eventually be necessary if bleeding is severe and leads to significant hemodynamic instability or severe anemia, it is **not the immediate next step** in managing the underlying cause of the hemorrhage (uterine atony).
- **Uterotonic agents** should be tried first to contract the uterus and stop the bleeding, as indicated by the patient's current vital signs being relatively stable (pulse 90/min, BP 130/72 mm Hg).
*Perform hysterectomy*
- **Hysterectomy** is a drastic measure considered only after all less invasive medical and surgical interventions (e.g., uterotonic agents, uterine tamponade, suturing techniques) have failed to control severe PPH.
- It would be **premature** to proceed directly to hysterectomy without attempting additional medical management for uterine atony.
*Administer carboprost tromethamine*
- **Carboprost tromethamine** is a prostaglandin analog that is effective in treating uterine atony but is **contraindicated in patients with asthma** due to its known side effect of inducing bronchospasm.
- The patient's history of asthma makes this a **dangerous option**, and an alternative uterotonic like methylergonovine should be chosen.
*Perform curettage*
- **Curettage** (removing retained placental fragments) would be appropriate if the cause of PPH was **retained placental tissue**.
- However, the examination finding of a **soft, enlarged, and boggy uterus** is characteristic of uterine atony, not retained placenta, and the initial management of atony involves uterotonic agents.
Question 4: Immediately following prolonged delivery of the placenta at 40 weeks gestation, a 32-year-old multiparous woman develops vaginal bleeding. Other than mild asthma, the patient’s pregnancy has been uncomplicated. She has attended many prenatal appointments and followed the physician's advice about screening for diseases, laboratory testing, diet, and exercise. Previous pregnancies were uncomplicated. She has no history of a serious illness. She is currently on intravenous infusion of oxytocin. Her temperature is 37.2°C (99.0°F), blood pressure is 108/60 mm Hg, pulse is 88/min, and respirations are 17/min. Uterine palpation reveals a soft enlarged fundus that extends above the umbilicus. Based on the assessment of the birth canal and placenta, which of the following options is the most appropriate initial step in patient management?
A. Intramuscular carboprost
B. Manual exploration of the uterus
C. Discontinuing oxytocin
D. Intravenous methylergonovine
E. Uterine fundal massage (Correct Answer)
Explanation: ***Uterine fundal massage***
- The patient presents with **postpartum hemorrhage** indicated by vaginal bleeding and a **soft, enlarged fundus** after placental delivery, suggesting **uterine atony**.
- **Uterine fundal massage** is the **first-line intervention** to encourage uterine contraction and reduce bleeding by expelling clots and compressing vessels.
*Intramuscular carboprost*
- **Carboprost** is a **prostaglandin F2 alpha analog** used to treat **uterine atony** when initial measures like uterine massage and oxytocin are insufficient.
- It is contraindicated in patients with **asthma** due to its bronchoconstrictive effects, which this patient has.
*Manual exploration of the uterus*
- **Manual exploration of the uterus** is indicated when there is suspicion of **retained placental fragments** or **uterine rupture**.
- While these can cause postpartum hemorrhage, the primary finding of a soft, boggy uterus points more strongly to atony, making massage the immediate priority.
*Discontinuing oxytocin*
- The patient is already on an **intravenous oxytocin infusion**, which is a uterotonic agent used to prevent and treat uterine atony.
- Discontinuing it would worsen **uterine atony** and increase blood loss, directly contradicting the goal of management.
*Intravenous methylergonovine*
- **Methylergonovine** is an **ergot alkaloid** used to treat **uterine atony**, but it is contraindicated in patients with **hypertension**, which is not explicitly present here, but it is a potent vasoconstrictor and second-line.
- It is often used as a **second-line agent** if oxytocin and massage are ineffective and there are no contraindications.
Question 5: A 37-year-old woman, gravida 4, para 3, at 35 weeks' gestation is admitted to the hospital in active labor. Her three children were delivered by Cesarean section. One hour after vaginal delivery, the placenta is not delivered. Manual separation of the placenta leads to profuse vaginal bleeding. Her pulse is 122/min and blood pressure is 90/67 mm Hg. A firm, nontender uterine fundus is palpated at the level of the umbilicus. Hemoglobin is 8.3 g/dL and platelet count is 220,000/mm3. Activated partial thromboplastin time and prothrombin time are within normal limits. Which of the following is the most likely underlying mechanism of this patient's postpartum bleeding?
A. Defective decidual layer of the placenta (Correct Answer)
B. Impaired uterine contractions
C. Rupture of the fetal vessels
D. Consumption of intravascular clotting factors
E. Rupture of the uterine wall
Explanation: **Defective decidual layer of the placenta**
- The patient's history of three previous Cesarean sections significantly increases the risk of **placenta accreta**, where the **placenta abnormally invades the uterine wall** due to a defective decidual layer.
- The inability to deliver the placenta an hour after vaginal delivery and subsequent profuse bleeding upon manual separation are classic signs of **placenta accreta spectrum**, as the placenta is morbidly adherent.
*Impaired uterine contractions*
- This would typically present as a **boggy, soft uterus** on palpation, rather than the "firm, nontender uterine fundus" described.
- Uterine atony is the most common cause of postpartum hemorrhage, but it is ruled out by the firm fundus and lack of uterine relaxation.
*Rupture of the fetal vessels*
- This usually occurs *before* or *during* delivery, presenting as **fetal distress** or **vaginal bleeding originating from the fetus** (e.g., vasa previa), which is not the primary issue here after labor and delivery.
- The profuse bleeding is *maternal* and occurs *after* delivery due to placental adherence, not fetal vessel rupture.
*Consumption of intravascular clotting factors*
- While severe hemorrhage can eventually lead to **disseminated intravascular coagulation (DIC)** and consumption of clotting factors, the patient's normal aPTT and PT indicate that coagulopathy is not the *initial* underlying mechanism of bleeding.
- This would be a *secondary complication* rather than the primary cause of undelivered placenta and initial hemorrhage.
*Rupture of the uterine wall*
- Uterine rupture typically presents with **acute, severe abdominal pain**, **fetal distress** (if it occurs before delivery), and **loss of uterine tone or palpation of fetal parts outside the uterus**.
- Although previous C-sections increase the risk, the firm uterine fundus and the specific problem with placental non-separation point away from uterine rupture as the primary cause of hemorrhage here.
Question 6: Five minutes after initiating a change of position and oxygen inhalation, the oxytocin infusion is discontinued. A repeat CTG that is done 10 minutes later shows recurrent variable decelerations and a total of 3 uterine contractions in 10 minutes. Which of the following is the most appropriate next step in management?
A. Restart oxytocin infusion
B. Emergent Cesarean section
C. Administer terbutaline
D. Monitor without intervention
E. Amnioinfusion (Correct Answer)
Explanation: ***Amnioinfusion***
- **Recurrent variable decelerations** persisting after discontinuing oxytocin and changing maternal position often indicate **cord compression**, which can be relieved by amnioinfusion.
- Adding fluid to the amniotic cavity **cushions the umbilical cord**, reducing compression during uterine contractions.
*Restart oxytocin infusion*
- Reinitiating oxytocin would likely **worsen the recurrent variable decelerations** by increasing uterine contraction frequency and intensity, thereby exacerbating cord compression.
- The goal is to alleviate fetal distress, not to intensify uterine activity that is already causing issues.
*Emergent Cesarean section*
- While an emergent Cesarean section is indicated for **unresolved fetal distress**, it's usually considered after less invasive measures, such as amnioinfusion, have failed.
- There is still an opportunity for a simpler intervention to resolve the issue before resorting to surgery.
*Administer terbutaline*
- Terbutaline is a **tocolytic agent** used to reduce uterine contractions, which can be helpful in cases of tachysystole or hyperstimulation.
- In this scenario, the contraction frequency is low (3 in 10 minutes), so reducing contractions is not the primary aim; rather, the focus is on resolving the cord compression causing decelerations.
*Monitor without intervention*
- **Recurrent variable decelerations** are an concerning sign of **fetal distress** and require intervention to prevent potential harm to the fetus.
- Simply monitoring without intervention would be inappropriate and could lead to worsening fetal hypoxemia and acidosis.
Question 7: A 31-year-old G6P6 woman with a history of fibroids gives birth to twins via vaginal delivery. Her pregnancy was uneventful, and she reported having good prenatal care. Both placentas are delivered immediately after the birth. The patient continues to bleed significantly over the next 20 minutes. Her temperature is 97.0°F (36.1°C), blood pressure is 124/84 mmHg, pulse is 95/min, respirations are 16/min, and oxygen saturation is 98% on room air. Continued vaginal bleeding is noted. Which of the following is the most appropriate initial step in management?
A. Oxytocin
B. Blood product transfusion
C. Uterine artery embolization
D. Hysterectomy
E. Bimanual massage (Correct Answer)
Explanation: ***Bimanual massage***
- The patient is experiencing **postpartum hemorrhage (PPH)**, indicated by significant bleeding post-delivery. **Uterine atony** is the most common cause of PPH, and bimanual massage helps stimulate uterine contractions to reduce bleeding.
- This is a **first-line, non-pharmacological intervention** that can be rapidly initiated to manage uterine atony.
*Oxytocin*
- While **oxytocin** is a uterotonic agent used to treat PPH, the initial step is typically **bimanual massage** to physically stimulate the uterus while preparing for medication administration.
- Oxytocin infusion would be administered concurrent with or immediately following bimanual massage, but manual compression is often initiated first.
*Blood product transfusion*
- Blood product transfusion is indicated for significant blood loss and hemodynamic instability, but it is a **supportive measure** rather than an initial intervention to stop the bleeding.
- The patient's current **blood pressure (124/84 mmHg)** and **pulse (95/min)** do not immediately suggest severe hypovolemic shock requiring immediate transfusion as the *first* step before attempting to control the source of bleeding.
*Uterine artery embolization*
- **Uterine artery embolization** is a highly invasive procedure typically reserved for cases where conservative measures, including uterotonic agents and bimanual compression, have failed to control PPH.
- It is not an appropriate initial step, as it requires specialized equipment and personnel and would delay immediate management of active bleeding.
*Hysterectomy*
- **Hysterectomy** is a last-resort intervention for intractable PPH that cannot be controlled by all other methods, including uterotonics, uterine massage, and other surgical or interventional radiology techniques.
- It is a highly invasive procedure with significant morbidity and is not considered an initial management step.
Question 8: A 30-year-old woman comes to the primary care physician because she has felt nauseous and fatigued for 3 weeks. Menses occur at irregular 24- to 33-day intervals and last for 4–6 days. Her last menstrual period was 7 weeks ago. Her temperature is 37°C (98.6°F), pulse is 95/min, and blood pressure is 100/70 mm Hg. Pelvic examination shows an enlarged uterus. Her serum β-hCG concentration is 96,000 mIU/mL (N < 5). An abdominal ultrasound is shown. Which of the following is the most likely diagnosis?
A. Partial hydatidiform mole
B. Bicornuate uterus pregnancy
C. Abdominal pregnancy
D. Complete hydatid mole (Correct Answer)
E. Dichorionic-diamniotic twins
Explanation: ***Complete hydatid mole***
- The ultrasound image shows a **\"snowstorm\" appearance** with multiple anechoic cysts, typical of a complete hydatidiform mole, consistent with **grape-like vesicles**.
- The significantly elevated **β-hCG level (96,000 mIU/mL)** and symptoms like nausea in conjunction with an enlarged uterus and irregular menses, are highly indicative of gestational trophoblastic disease.
*Partial hydatidiform mole*
- A partial mole typically shows evidence of **fetal tissue** or a **fetus** with associated placental changes, which is absent in this image and clinical presentation.
- While β-hCG levels can be elevated, they are often lower than in complete moles and less likely to show the classic **\"snowstorm\" appearance** in the absence of fetal parts.
*Bicornuate uterus pregnancy*
- A bicornuate uterus is a **uterine anomaly** where the uterus has two horns, and pregnancy would typically occur in one of these horns, appearing as a normal or atypical intrauterine pregnancy on ultrasound.
- The ultrasound image does not show a normally developing pregnancy within a horn of a bicornuate uterus, but rather a characteristic vesicular pattern within the uterus.
*Abdominal pregnancy*
- Abdominal pregnancy involves an **ectopic implantation** outside the uterus, in the abdominal cavity, often showing abnormal fetal presentation and placental attachment to abdominal organs.
- The ultrasound clearly shows an **intrauterine mass** with the characteristic vesicular pattern, ruling out an abdominal pregnancy.
*Dichorionic-diamniotic twins*
- This refers to a **twin pregnancy** with two separate placentas and two separate amniotic sacs, which would be visible as two distinct gestational sacs and two fetuses on ultrasound.
- The image shows a **single mass** with a vesicular pattern, not two separate gestational sacs or fetuses, nor two distinct placentas.
Question 9: A 44-year-old G2P2 African American woman presents to her gynecologist for dysmenorrhea. She reports that for the past few months, she has been having severe pain during her menses. She also endorses menstrual bleeding that has been heavier than usual. The patient reports that her cycles are regular and occur every 30 days, and she denies both dyspareunia and spotting between her periods. Her last menstrual period was two weeks ago. In terms of her obstetric history, the patient had two uncomplicated pregnancies, and she had no difficulty becoming pregnant. She has never had an abnormal pap smear. Her past medical history is otherwise significant for hyperlipidemia and asthma. On physical exam, the patient’s uterus is tender, soft, and enlarged to the size of a pregnant uterus at 10 weeks of gestation. She is non-tender during vaginal exam, without cervical motion tenderness or adnexal masses. Her BMI is 24 kg/m2. A urine pregnancy test is negative.
Which of the following is the most likely diagnosis for this patient?
A. Presence of endometrial glands and stroma outside the uterus
B. Benign smooth muscle tumor of the uterus
C. Hyperplastic overgrowths of endometrial glands and stroma
D. Malignant invasion of endometrial cells into uterine myometrium
E. Presence of endometrial glands and stroma in uterine myometrium (Correct Answer)
Explanation: ***Presence of endometrial glands and stroma in uterine myometrium***
- The patient's symptoms of **severe dysmenorrhea**, **menorrhagia** (heavy bleeding), and a **tender, soft, and diffusely enlarged uterus** in a multiparous woman are classic signs of **adenomyosis**.
- **Adenomyosis** is pathologically defined by the presence of **ectopic endometrial tissue (glands and stroma) within the myometrium**, leading to endometrial tissue hypertrophy in response to hormonal stimulation.
*Presence of endometrial glands and stroma outside the uterus*
- This describes **endometriosis**, which typically presents with **dyspareunia**, **chronic pelvic pain**, and **infertility**, which are not the primary complaints here.
- While endometriosis can cause dysmenorrhea and menorrhagia, the **diffusely enlarged, soft, and tender uterus** on physical exam strongly points away from endometriosis as the sole diagnosis.
*Benign smooth muscle tumor of the uterus*
- This refers to **leiomyomas (fibroids)**, which also cause **menorrhagia** and an **enlarged uterus**. However, fibroids typically manifest as a **firm, irregularly enlarged uterus** with palpable nodules, distinguishing them from the diffusely enlarged and soft uterus described.
- While fibroids can cause dysmenorrhea, the **tenderness** and **diffuse enlargement** are more characteristic of adenomyosis.
*Hyperplastic overgrowths of endometrial glands and stroma*
- This describes **endometrial polyps**, which typically cause **intermenstrual bleeding** or **post-coital spotting**, not severe dysmenorrhea and a diffusely enlarged, soft uterus.
- Polyps are usually smaller and do not cause uterine enlargement to the extent described.
*Malignant invasion of endometrial cells into uterine myometrium*
- This describes **endometrial cancer** with myometrial invasion, which would typically present with **postmenopausal bleeding** or **irregular uterine bleeding**.
- While it can cause an enlarged uterus, it's less likely to present with the diffuse tenderness and softness observed, especially in a premenopausal woman with regular cycles and no history of abnormal Pap smears.
Question 10: A 39-year-old woman, gravida 4, para 4, comes to the physician because of a 5-month history of painful, heavy menses. Menses previously occurred at regular 28-day intervals and lasted 3 days with normal flow. They now last 7–8 days and the flow is heavy with the passage of clots. Pelvic examination shows a tender, uniformly enlarged, flaccid uterus consistent in size with an 8-week gestation. A urine pregnancy test is negative. Which of the following is the most likely cause of this patient's findings?
A. Malignant transformation of endometrial tissue
B. Pedunculated endometrial mass
C. Endometrial tissue within the uterine wall (Correct Answer)
D. Endometrial tissue within the ovaries
E. Benign tumor of the myometrium
Explanation: ***Endometrial tissue within the uterine wall***
- This describes **adenomyosis**, a condition where **endometrial glands and stroma** are found within the myometrium. It commonly presents with **dysmenorrhea** (painful menses), **menorrhagia** (heavy flow), and a **uniformly enlarged, soft, tender uterus**, especially in multiparous women.
- The patient's presentation of painful, heavy menses, prolonged bleeding, passage of clots, and a tender, uniformly enlarged uterus strongly points to adenomyosis.
*Malignant transformation of endometrial tissue*
- This refers to **endometrial carcinoma**, which typically presents with **postmenopausal bleeding** or irregular uterine bleeding, but less commonly with severe dysmenorrhea and a diffusely enlarged, tender uterus in premenopausal women.
- While it can cause heavy bleeding, the **uniform enlargement** and **tenderness** of the uterus are less characteristic of endometrial cancer.
*Pedunculated endometrial mass*
- This likely refers to an **endometrial polyp**, which can cause **heavy or irregular bleeding** but typically does not result in a **uniformly enlarged** and tender uterus.
- Polyps are usually visualized via imaging (e.g., sonohysterography or hysteroscopy) and are not associated with diffuse uterine enlargement.
*Endometrial tissue within the ovaries*
- This describes **ovarian endometriosis** (endometrioma or "chocolate cyst"), which commonly causes **chronic pelvic pain**, **dyspareunia**, and **infertility**.
- While it can cause dysmenorrhea, it does not typically lead to a **uniformly enlarged, flaccid, and tender uterus**, as the pathology is primarily ovarian, not diffuse within the uterus.
*Benign tumor of the myometrium*
- This refers to a **leiomyoma** (fibroid), which can cause **heavy bleeding** and an **enlarged uterus**. However, fibroids typically present as **firm, irregular, or nodular masses**, and are less commonly associated with the diffuse tenderness seen in this patient.
- While some fibroids can grow large and cause pain, the **tender, uniformly enlarged, flaccid uterus** is more indicative of adenomyosis than fibroids.
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