Growth and Development — MCQs

Growth and Development Indian Medical PG Practice Questions and MCQs

Question 331: Which of the following statements is not true regarding autistic disorder?

A. Impaired communication
B. Impaired imagination
C. Language developmental delay
D. Vision problems (Correct Answer)

Explanation: **Explanation:** Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder characterized by a "triad of impairments": social interaction, communication, and restricted/repetitive patterns of behavior. **Why "Vision problems" is the correct answer:** Vision problems are **not** a diagnostic feature or a core clinical manifestation of autism. While children with ASD may exhibit atypical visual behaviors (such as avoiding eye contact or looking at objects from unusual angles), the primary pathology is neurological and behavioral, not ocular. Any refractive errors or visual deficits in an autistic child are considered comorbid or incidental rather than a part of the disorder itself. **Analysis of incorrect options:** * **Impaired communication:** This is a hallmark of ASD. It includes deficits in social-emotional reciprocity and non-verbal communicative behaviors (e.g., lack of gestures or facial expressions). * **Impaired imagination:** Children with ASD typically show a lack of varied, spontaneous make-believe play or social imitative play. This "poverty of imagination" is a key diagnostic criterion. * **Language developmental delay:** Significant delay in, or total lack of, the development of spoken language is very common. Even when language is present, there is often an inability to initiate or sustain conversation. **Clinical Pearls for NEET-PG:** * **M-CHAT (Modified Checklist for Autism in Toddlers):** The most commonly used screening tool (usually at 18 and 24 months). * **Early Sign:** Failure to respond to name by 12 months and lack of "joint attention" (pointing to show interest). * **Prognosis:** The best predictors of long-term outcome are the **IQ level** and the **development of communicative language** by age 5. * **Associated Condition:** Fragile X syndrome is the most common single-gene cause of autism.

Question 332: All of the following are causes of proportional short stature EXCEPT?

A. Turner syndrome
B. Down syndrome
C. Osteogenesis imperfecta (Correct Answer)
D. Chronic kidney disease

Explanation: Short stature is clinically categorized into two types: **Proportional** (the trunk and limbs are equally affected) and **Disproportional** (limbs are shorter than the trunk or vice-versa). ### **Why Osteogenesis Imperfecta (OI) is the Correct Answer** **Osteogenesis imperfecta** is a cause of **disproportional short stature**. It is a genetic disorder of Type I collagen that leads to bone fragility and multiple fractures. These fractures result in progressive bony deformities, bowing of long bones, and vertebral collapses, leading to a trunk-limb ratio that is abnormal. Most skeletal dysplasias (like Achondroplasia and OI) result in disproportionality. ### **Analysis of Incorrect Options (Causes of Proportional Short Stature)** * **Turner Syndrome (45, XO):** This is a classic cause of proportional short stature in girls. The growth failure is attributed to the haploinsufficiency of the *SHOX* gene. * **Down Syndrome (Trisomy 21):** Children with Down syndrome exhibit generalized growth retardation, but the body proportions remain symmetrical. * **Chronic Kidney Disease (CKD):** Systemic or "non-endocrine" chronic illnesses (including CKD, Malabsorption, and Cyanotic Heart Disease) result in proportional growth failure because the metabolic insult affects the entire body uniformly. ### **High-Yield Clinical Pearls for NEET-PG** * **Disproportional Short Stature:** * **Short Limbs:** Achondroplasia (most common), Osteogenesis Imperfecta, Rickets. * **Short Trunk:** Morquio syndrome, Spondyloepiphyseal dysplasia. * **Proportional Short Stature:** * **Prenatal onset:** IUGR, Chromosomal anomalies (Down, Turner). * **Postnatal onset:** Malnutrition, Emotional deprivation, Endocrine causes (GH deficiency, Hypothyroidism), and Chronic systemic diseases. * **The *SHOX* gene** is located on the distal short arms of the X and Y chromosomes; its absence is the primary reason for short stature in Turner syndrome.

Question 333: What developmental milestone can an 18-month-old infant achieve?

A. Climbing stairs (Correct Answer)
B. Can turn 2-3 pages at a time
C. Can say 2-3 words
D. Can make a tower of 8 cubes

Explanation: ### Explanation At **18 months**, a child undergoes significant transitions in motor, language, and social domains. **1. Why "Climbing Stairs" is correct:** By 18 months, a child achieves the gross motor milestone of **climbing stairs with one hand held**. While they can walk upstairs independently by 24 months (two feet per step), the initiation of stair climbing is a hallmark of the 18-month developmental stage. Additionally, at this age, a child can run (though stiffly) and seat themselves in a chair. **2. Analysis of Incorrect Options:** * **B. Can turn 2-3 pages at a time:** This is a **12-month (1 year)** milestone. By 18 months, fine motor skills have improved to the point where they can turn pages of a book **one at a time**. * **C. Can say 2-3 words:** This is a **12-month** milestone. By 18 months, a child typically has a vocabulary of **10–15 words** and can point to common objects or body parts. * **D. Can make a tower of 8 cubes:** This is a **30-month (2.5 years)** milestone. The progression of the cube tower is a high-yield NEET-PG topic: * 15 months: 2 cubes * **18 months: 3–4 cubes** * 24 months: 6 cubes * 36 months: 9 cubes (or a bridge) **3. Clinical Pearls for NEET-PG:** * **Social Milestone:** The 18-month-old mimics domestic activities (e.g., sweeping) and begins to show "feeding self" skills using a spoon. * **Red Flag:** If a child cannot walk independently by 18 months, it is considered a global developmental delay requiring immediate evaluation. * **The "Rule of 3" for 18 months:** 3-4 cube tower, 10-15 words, and "3" (triangular) scribbling begins (though circular strokes are more common at 24 months).

Question 334: What is the best site to demonstrate capillary filling in infants?

A. Nail bed
B. Sternum (Correct Answer)
C. Ear lobule
D. Great toe

Explanation: **Explanation:** **Capillary Refill Time (CRT)** is a rapid clinical test used to assess peripheral perfusion and cardiac output. In infants, the **Sternum** is considered the gold standard and the most reliable site for this assessment. **Why the Sternum is the Correct Answer:** In pediatric practice, peripheral sites like the hands or feet are highly susceptible to environmental temperatures. Cold ambient air can cause peripheral vasoconstriction, leading to a falsely prolonged CRT even in a hemodynamically stable infant. The sternum, being a **central site**, is less affected by ambient temperature and more accurately reflects core perfusion and central circulation. The procedure involves pressing the skin over the mid-sternum for 5 seconds; a normal refill occurs in **<2 seconds**. **Analysis of Incorrect Options:** * **Nail bed & Great toe:** These are peripheral sites. They are frequently affected by "cold stress," leading to inaccurate readings. While commonly used in adults, they are not the "best" or most reliable sites for infants. * **Ear lobule:** This site lacks a firm underlying bony prominence, making it difficult to apply the standardized pressure required to blanch the capillaries effectively. **High-Yield Clinical Pearls for NEET-PG:** * **Standardized Technique:** Press for 5 seconds; normal CRT is <2 seconds. * **Significance:** A prolonged CRT (>3 seconds) is a sensitive indicator of **shock** (hypovolemic or septic) and severe dehydration in children. * **WHO Recommendation:** For children with diarrhea, a prolonged CRT is one of the key signs used to classify "Severe Dehydration." * **False Prolongation:** Besides cold, CRT can be prolonged in cases of fever, anemia, or use of certain vasodilators.

Question 335: At what age is a unilateral undescended testis typically considered for surgical intervention?

A. 2 months of age
B. 6 months of age
C. 12 months of age (Correct Answer)
D. 14 months of age

Explanation: **Explanation:** The management of an undescended testis (cryptorchidism) is guided by the natural history of testicular descent. **1. Why 12 months is the correct answer:** Most undescended testes descend spontaneously within the first few months of life. However, spontaneous descent is rare after the age of **6 months**. Current clinical guidelines (including AAP and IAP) recommend that if the testis has not descended by 6 months, surgical intervention (**Orchidopexy**) should be planned. The procedure is ideally performed between **6 and 12 months** of age, and certainly before 18 months, to preserve fertility potential and reduce the risk of malignancy. In the context of NEET-PG, **12 months** is the standard milestone by which surgical correction should be completed or initiated. **2. Why other options are incorrect:** * **2 months (A):** Too early; there is a high probability of spontaneous descent during the first 3–4 months. * **6 months (B):** This is the age at which we *decide* surgery is necessary because spontaneous descent stops, but 12 months is the conventional upper limit for the intervention to be finalized. * **14 months (D):** While surgery can be done here, it is considered delayed. Delaying beyond 12–18 months increases the risk of germ cell loss and histological changes. **Clinical Pearls for NEET-PG:** * **Most common site:** Inguinal canal. * **Complications:** Infertility (most common), Testicular Torsion, Inguinal Hernia, and Testicular Cancer (Seminoma is the most common). * **Surgery:** Orchidopexy does not eliminate the risk of cancer but makes the testis accessible for physical examination/screening. * **Hormonal therapy:** (hCG or GnRH) is generally not recommended as first-line treatment due to low efficacy compared to surgery.

Question 336: Which of the following is not a feature of Trisomy 21?

A. Mental retardation
B. Duodenal atresia
C. Hypotonia (Correct Answer)
D. Congenital heart disease

Explanation: **Explanation:** The question asks for the feature that is **not** a characteristic of Trisomy 21 (Down Syndrome). However, there is a technical nuance in the provided options: **Hypotonia is actually a hallmark clinical feature of Trisomy 21.** In the context of standard NEET-PG patterns, if "Hypotonia" is marked as the correct answer for a "NOT" question, it usually implies a clerical error in the question stem or options. However, clinically, all four options are associated with Down Syndrome. If we must justify "Hypotonia" as the outlier, it is only because it is a **neuromuscular sign** rather than a structural malformation or a permanent cognitive deficit, but this is clinically atypical as hypotonia is present in nearly 100% of newborns with Trisomy 21. **Analysis of Options:** * **A. Mental Retardation:** This is the most common cause of genetic intellectual disability. IQ scores typically range from 25 to 70. * **B. Duodenal Atresia:** Down Syndrome is strongly associated with gastrointestinal anomalies; "Double Bubble" sign on X-ray is a classic finding. * **C. Hypotonia:** This is a cardinal sign in neonates ("floppy baby"), often helping in the initial bedside diagnosis. * **D. Congenital Heart Disease (CHD):** Occurs in ~40-50% of cases. The most common defect is an **Endocardial Cushion Defect (AVSD)**, followed by VSD. **High-Yield Clinical Pearls for NEET-PG:** * **Most common CHD:** Atrioventricular Septal Defect (AVSD). * **Dermatoglyphics:** Simian crease (single transverse palmar crease) and increased sandal gap (between 1st and 2nd toes). * **Hematology:** Increased risk of **AMKL (M7)** in children <3 years and **ALL** in children >3 years. * **Screening:** First-trimester screening shows **low PAPP-A** and **high β-hCG** with increased Nuchal Translucency.

Question 337: A child can climb upstairs and downstairs two steps at a time, make a tower of 6 cubes, and speak 10 words with meaning. Assuming that the development of this child is normal, which of the following developmental milestones would this child NOT be expected to achieve?

A. Draw a circle, copying a circle (Correct Answer)
B. Kick a ball
C. Feed well with a spoon
D. Domestic mimicry (copies parents in tasks)

Explanation: To solve this question, we must first determine the child's developmental age based on the milestones provided. ### **Step 1: Determine the Developmental Age** * **Gross Motor:** Climbing stairs two feet per step (up and down) is a **2-year-old (24 months)** milestone. * **Fine Motor:** Building a tower of 6 cubes is characteristic of a **2-year-old** (Formula: Age in years × 3). * **Language:** Speaking 10 words with meaning and simple sentences is expected at **2 years**. * **Social:** Parallel play and domestic mimicry are typical for **2 years**. **Conclusion:** The child is approximately **2 years (24 months) old.** ### **Step 2: Evaluate the Options** * **A. Draw a circle (Correct Answer):** Copying a circle is a **3-year-old** milestone. A 2-year-old can only imitate a vertical stroke or scribble spontaneously. Therefore, a 2-year-old is NOT expected to achieve this. * **B. Kick a ball:** This is a **2-year-old** milestone. * **C. Feed well with a spoon:** By **2 years**, a child can feed themselves with a spoon without much spilling. * **D. Domestic mimicry:** Imitating household tasks (e.g., sweeping) begins at **18–24 months**. ### **High-Yield Clinical Pearls for NEET-PG** 1. **Tower of Cubes Formula:** * 15 months: 2 cubes * 18 months: 3 cubes * 24 months: 6 cubes * 36 months: 9 cubes (or a bridge) 2. **Stair Climbing:** * 2 years: 2 feet per step (Up and Down) * 3 years: 1 foot per step (Up); 2 feet per step (Down) * 4 years: 1 foot per step (Up and Down) 3. **Drawing Shapes (Chronological Order):** * 2 years: Vertical line * 3 years: **Circle** * 4 years: Cross/Square * 5 years: Triangle

Question 338: Severe acute malnutrition is diagnosed when the arm circumference is less than what value in cm?

A. 12.5
B. 13.5
C. 12
D. 11.5 (Correct Answer)

Explanation: **Explanation:** Severe Acute Malnutrition (SAM) is a critical clinical condition defined by the World Health Organization (WHO) and the Ministry of Health and Family Welfare (MoHFW) based on specific anthropometric criteria for children aged **6 to 59 months**. **1. Why 11.5 cm is correct:** Mid-Upper Arm Circumference (MUAC) is a proxy for muscle mass and is used as a rapid screening tool for malnutrition. A **MUAC < 11.5 cm** indicates severe muscle wasting and is one of the independent diagnostic criteria for **Severe Acute Malnutrition (SAM)**. At this threshold, the risk of mortality increases significantly. **2. Analysis of Incorrect Options:** * **12.5 cm (Option A):** This is the cutoff for **Moderate Acute Malnutrition (MAM)**. Children with a MUAC between 11.5 cm and 12.5 cm are classified as moderately malnourished. * **13.5 cm (Option B):** A MUAC above 13.5 cm is generally considered indicative of a **well-nourished** child. * **12 cm (Option C):** This value falls within the range of Moderate Acute Malnutrition (11.5–12.5 cm) and does not represent the specific diagnostic threshold for SAM. **3. High-Yield Clinical Pearls for NEET-PG:** * **SAM Diagnostic Criteria (Any one of the following):** 1. MUAC < 11.5 cm. 2. Weight-for-Height Z-score **< -3 SD**. 3. Presence of **bilateral pitting pedal edema** (Nutritional Edema). * **Shakir’s Tape:** The tri-colored tape used to measure MUAC (Red: <11.5cm, Yellow: 11.5–12.5cm, Green: >12.5cm). * **Age Stability:** MUAC is relatively constant between ages 1 and 5, making it an age-independent assessment tool in this bracket.

Question 339: Which is not a feature of Edward's syndrome?

A. Simian crease (Correct Answer)
B. Micrognathia
C. Mental retardation
D. Congenital heart defects

Explanation: **Explanation:** **Edward’s Syndrome (Trisomy 18)** is the second most common autosomal trisomy. The correct answer is **Simian crease**, as this is a classic feature of **Down Syndrome (Trisomy 21)**, not Edward’s syndrome. While a single palmar crease can occasionally occur in various conditions, it is a high-yield "distractor" specifically associated with Trisomy 21 in competitive exams. **Analysis of Options:** * **Micrognathia (Option B):** This is a hallmark feature of Edward’s syndrome. These infants typically present with a small jaw, a prominent occiput, and low-set malformed ears. * **Mental Retardation (Option C):** Severe intellectual disability is a universal feature of all major autosomal trisomies (13, 18, and 21). * **Congenital Heart Defects (Option D):** Over 90% of infants with Edward’s syndrome have cardiac defects, most commonly **Ventricular Septal Defect (VSD)**, followed by PDA and ASD. **Clinical Pearls for NEET-PG:** To differentiate Trisomies quickly, remember these specific "pathognomonic" signs for Edward’s Syndrome: 1. **Clenched fist:** Index finger overlapping the 3rd finger and 5th finger overlapping the 4th. 2. **Rocker-bottom feet:** Due to a prominent calcaneus (also seen in Patau syndrome/Trisomy 13). 3. **Shield chest:** Short sternum with widely spaced nipples. 4. **Horseshoe kidney:** The most common renal anomaly in these patients. 5. **Prognosis:** Most cases result in fetal loss; those born alive rarely survive beyond the first year of life.

Question 340: Which of the following findings is NOT typically seen in Prader-Willi syndrome?

A. Mental retardation
B. Short stature
C. Hypotonia
D. Inappropriate laughter (Correct Answer)

Explanation: **Explanation:** Prader-Willi Syndrome (PWS) is a genetic disorder caused by the loss of function of specific genes on the **paternal chromosome 15 (15q11-q13)**, most commonly due to chromosomal deletion or maternal uniparental disomy. **Why "Inappropriate Laughter" is the correct answer:** Inappropriate, paroxysmal laughter (gelastic seizures) is the hallmark clinical feature of **Angelman Syndrome**, not Prader-Willi. While both syndromes involve the same locus on chromosome 15, Angelman results from the loss of the **maternal** copy. Patients with Angelman syndrome are often referred to as "Happy Puppets" due to their frequent laughter and jerky movements. **Analysis of Incorrect Options:** * **Hypotonia:** This is the most striking feature in the neonatal period ("floppy infant"). It often leads to poor suckling and failure to thrive in early infancy. * **Short Stature:** This is a common feature resulting from Growth Hormone (GH) deficiency. GH replacement therapy is a standard treatment for PWS. * **Mental Retardation:** Most children with PWS have mild to moderate intellectual disability along with characteristic behavioral issues like temper tantrums and skin picking. **Clinical Pearls for NEET-PG:** * **Hyperphagia:** The transition from neonatal hypotonia to insatiable hunger (hyperphagia) usually occurs between ages 1–4, leading to **morbid obesity**. * **Hypogonadism:** PWS is characterized by small hands/feet and undescended testes (cryptorchidism). * **Diagnosis:** The initial screening test of choice is **DNA Methylation analysis**. * **Mnemonic:** **P**rader-Willi = **P**aternal deletion; **A**ngelman = **M**aternal deletion (**MAP**).

Practice by Chapter

Normal Growth Parameters

Practice Questions

Developmental Milestones

Practice Questions

Puberty and Adolescent Development

Practice Questions

Growth Disorders

Practice Questions

Failure to Thrive

Practice Questions

Developmental Screening and Assessment

Practice Questions

Developmental Delays

Practice Questions

Growth Charts and Monitoring

Practice Questions

Short Stature

Practice Questions

Tall Stature

Practice Questions

Precocious and Delayed Puberty

Practice Questions

Psychosocial Development

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