Growth and Development Practice Questions

Q: The reflex shown below disappears by what age?

3 months. ***3 months*** - The image depicts the **rooting reflex**, where a baby turns its head and opens its mouth in response to a touch on the cheek or around the mouth, indicating readiness to feed. - This primitive reflex is crucial for feeding in newborns and typically **disappears by 3-4 months of age**. - **3 months represents the beginning of the typical age range** when this reflex starts to disappear in neurologically normal infants. *1 month* - At 1 month of age, the rooting reflex is still prominently present and active. - This is too early for the reflex to disappear; it serves an important feeding function at this age. *2 months* - While the rooting reflex may begin to diminish slightly by 2 months, it typically persists beyond this age. - This represents an earlier disappearance than the accepted standard range of 3-4 months. *4 months* - By 4 months, the rooting reflex has usually fully integrated or disappeared in most neurologically normal infants. - While this is within the acceptable range (3-4 months), **3 months is the more commonly cited age** when disappearance typically begins. - Persistence beyond 4-6 months may warrant neurological evaluation.

Q: The image shows presence of:

Hemihypertrophy. ***Hemihypertrophy*** - The image clearly demonstrates **asymmetric growth**, with one leg appearing significantly larger and longer than the other, which is characteristic of hemihypertrophy. - This condition involves the **overgrowth of one side of the body or a body part**, and is often associated with certain genetic syndromes like Beckwith-Wiedemann syndrome. *Polydactyly* - **Polydactyly** refers to the presence of **extra fingers or toes**. - The image does not show any supernumerary digits; instead, it highlights a discrepancy in limb size. *Phocomelia* - **Phocomelia** is a rare congenital malformation where the **proximal parts of limbs are absent or severely reduced**, leading to hands or feet being attached close to the trunk. - The image displays fully formed limbs, albeit with disproportionate size. *Amniotic band sequence* - **Amniotic band sequence** results from entrapment of fetal parts in fibrous amniotic bands, leading to **constriction rings, amputations, or other deformities**. - No such bands, constrictions, or amputations are visible in the image; the primary finding is asymmetric limb growth.

Q: A child suffering from respiratory and feeding difficulties was brought for consultation. All of the following are to be considered in differential diagnosis of the child except:

Turner syndrome. ***Turner syndrome*** - Turner syndrome is a **chromosomal disorder** (45,XO) primarily affecting females, characterized by **short stature**, **gonadal dysgenesis**, and various physical features that typically do not include the severe craniofacial malformations causing immediate respiratory and feeding difficulties seen in the other syndromes. - While it can involve **cardiac anomalies** (e.g., coarctation of the aorta), these generally do not manifest as immediate life-threatening respiratory or feeding issues in the newborn period in the same way as disorders with significant craniofacial malformations. *Treacher Collins syndrome* - This is a **craniofacial dysostosis** characterized by **mandibulofacial anomalies**, including hypoplasia of the zygomatic bones and mandible, and downward-sloping palpebral fissures. - These malformations often lead to **airway obstruction** (due to micrognathia and glossoptosis) and **feeding difficulties**. *Pierre-Robin syndrome* - Characterized by the triad of **micrognathia**, **glossoptosis** (posterior displacement of the tongue), and **cleft palate**. - The combination of a small jaw and a tongue that falls back can cause severe **upper airway obstruction** and significant **feeding problems**. *Velocardiofacial syndrome* - Also known as **22q11.2 deletion syndrome**, this condition is associated with a wide range of features including **palatal abnormalities** (cleft palate or velopharyngeal insufficiency), **cardiac defects**, and distinctive facial features. - The palatal issues can lead to **feeding difficulties**, and cardiac or upper airway anomalies can contribute to **respiratory problems**.

Q: What is the expected karyotype in this child with the following findings and having pulmonic stenosis on Echocardiography?

46,XY. ***46,XY*** - The image depicts a child with features suggestive of **Noonan Syndrome**, characterized by widely spaced eyes, low-set ears, a short webbed neck, and **pulmonic stenosis**. - Noonan Syndrome is a **cardiofacial cutaneous syndrome** that is genetically heterogeneous; however, it typically presents with a **normal karyotype of 46,XY** for males or 46,XX for females, as it arises from mutations in genes like *PTPN11*, *SOS1*, *RAF1*, or *KRAS*, rather than chromosomal aneuploidies. *46,XX* - This karyotype represents a **normal female**. While females can have Noonan Syndrome, the general characteristic features pointing towards a male child in the provided image makes this option less likely in this specific context. - The question asks for the expected karyotype in "this child," implying a specific gender based on the drawing; however, if the child were female with Noonan Syndrome, 46,XX would be expected. *45,X* - This karyotype corresponds to **Turner Syndrome**, which typically affects females and is characterized by features such as **short stature**, a webbed neck, and **coarctation of the aorta** (not pulmonic stenosis). - While there is some phenotypic overlap (e.g., webbed neck), the presence of pulmonic stenosis and other facial features are more consistent with Noonan syndrome, which is not associated with a monosomy of the X chromosome. *47,XXY* - This karyotype represents **Klinefelter Syndrome**, which affects males and is characterized by **tall stature**, **hypogonadism**, and **gynecomastia**. - The features in the image, including the **facial dysmorphism** and **pulmonic stenosis**, are inconsistent with the typical presentation of Klinefelter Syndrome.

Q: During evaluation of a child with Down syndrome, the following finding is noted. Identify?

Simian crease. ***Simian crease*** - The image displays a **single palmar crease** (also known as a simian crease or transverse palmar crease), which is a common physical finding in individuals with **Down syndrome (Trisomy 21)**. - This crease runs straight across the palm, often replacing the usual two major palmar creases. *Kennedy crease* - This is **not a recognized medical term** for a palmar crease or any specific dermatological finding. - The feature shown in the image is a clearly defined, single transverse palmar crease. *Sydney line* - A **Sydney line** is another type of palmar crease abnormality where the proximal transverse crease extends across the entire palm, reaching the ulnar edge. - While it is a variation of palmar creases, the crease in the image appears as a single, bold transverse crease, more consistent with a **simian crease**. *Sandal gap* - A **sandal gap** refers to a wide space between the first and second toes, sometimes seen in newborns, including those with Down syndrome. - This finding relates to the **foot**, not the hand, and is not depicted in the provided image.

Q: Which of the following is associated with this condition?

Edward syndrome. ***Edward syndrome*** - The image shows **rocker-bottom feet**, which is a characteristic skeletal deformity seen in Edward syndrome (**Trisomy 18**). - Rocker-bottom feet present as a **convex sole** with prominent heel and a **vertical talus**, creating a "rocker" appearance, and is one of the classic **dysmorphic features** of Trisomy 18. - Other features of Edward syndrome include **overlapping fingers** (clenched fist with index finger over third finger), **low-set malformed ears**, **micrognathia**, and **congenital heart defects**. *Turner syndrome* - Turner syndrome affects females with **absent or partial X chromosome** (45,X0), characterized by **short stature**, **webbed neck**, **lymphedema**, and **cardiac anomalies** (coarctation of aorta, bicuspid aortic valve). - Not associated with the specific **rocker-bottom feet** deformity shown in the image. *Patau syndrome* - Patau syndrome (**Trisomy 13**) may rarely have rocker-bottom feet but is more characteristically associated with **polydactyly**, **midline defects** (cleft lip/palate, holoprosencephaly), **microphthalmia**, and **scalp defects**. - The isolated **rocker-bottom feet** shown is more specific to Edward syndrome. *Down syndrome* - Down syndrome (**Trisomy 21**) is associated with **sandal gap deformity** (wide space between first and second toe) due to **hypotonia** and **ligamentous laxity**. - While Down syndrome has foot abnormalities, **rocker-bottom feet** are characteristic of **Trisomy 18** (Edward syndrome), not Trisomy 21.

Q: During evaluation of a child with obesity, following finding is observed. What is the association?

Laurence-Moon-Bardet-Biedl syndrome. ***Laurence-Moon-Bardet-Biedl syndrome*** - The image exhibits **polydactyly**, characterized by the presence of **extra digits** on the hand, which is a common feature of Laurence-Moon-Bardet-Biedl syndrome. - This syndrome is a pleiotropic, autosomal recessive genetic disorder also characterized by **obesity**, **retinal degeneration**, **gonadal dysfunction**, **kidney abnormalities**, and **learning disorders**. *Prader-Willi syndrome* - Characterized by **severe hypotonia** and feeding difficulties in infancy, followed by **hyperphagia** and obesity in childhood. - While it causes obesity, it is not typically associated with **polydactyly**. *Beckwith-Wiedemann syndrome* - This syndrome is associated with **macrosomia**, **macroglossia**, **omphalocele**, **hemihyperplasia**, and an increased risk of childhood tumors. - It does not typically present with **polydactyly** or the constellation of symptoms seen in the given context. *Pseudo-pseudo-hypoparathyroidism* - This condition is a variant of **Albright's hereditary osteodystrophy** but without the biochemical abnormalities of hypoparathyroidism. - It is characterized by **short stature**, **brachydactyly**, **obesity**, and intellectual disability, but **polydactyly** is not a feature.

Q: This baby has obesity along with organomegaly. Comment on the diagnosis from the hint given in the image?

Beckwith-Wiedemann syndrome. ***Beckwith-Wiedemann syndrome*** - The image shows **earlobe creases and posterior helical pits**, which, combined with the presence of **obesity and organomegaly** (as suggested by "obesity and organomegaly"), are classic features of Beckwith-Wiedemann syndrome. - Other common features include **macroglossia**, **omphalocele**, and an increased risk of specific childhood tumors like Wilms tumor and hepatoblastoma. *Prader-Willi syndrome* - Characterized by **obesity** due to hyperphagia, but typically presents with **almond-shaped eyes**, small hands and feet, and **hypotonia** in infancy, not earlobe creases or organomegaly in the same context. - It is caused by the loss of function of specific genes on **chromosome 15** typically inherited from the father. *Bell syndrome* - **Bell syndrome** is not a recognized medical syndrome presenting with obesity, organomegaly, and ear anomalies. This option appears to be a distractor. - The term "Bell's palsy" refers to **idiopathic facial paralysis**, which is unrelated to the described symptoms. *Laurence-Moon-Bardet-Biedl syndrome* - This syndrome is characterized by **obesity** but also includes features such as **rod-cone dystrophy**, **polydactyly**, kidney abnormalities, and cognitive impairment. - It does not typically present with the specific ear anomalies (creases, pits) or neonatal organomegaly seen in Beckwith-Wiedemann syndrome.

Q: Which of the following conditions is characterized by severe respiratory distress in newborns due to a small thorax, very short limbs, and a large head with midfacial hypoplasia and Cloverleaf skull deformity?

Thanatophoric dwarfism. ***Thanatophoric dwarfism*** - **Thanatophoric dwarfism** is a **lethal skeletal dysplasia** characterized by severe micromelia (very short limbs), a **small thorax**, and distinct craniofacial features including a large head with midfacial hypoplasia and **Cloverleaf skull deformity (Kleeblattschädel)** - The **small thorax** leads to **pulmonary hypoplasia**, causing severe respiratory distress and making it incompatible with life, typically resulting in death shortly after birth - It is caused by mutations in the **FGFR3 gene** and is the most common **lethal skeletal dysplasia** - The combination of cloverleaf skull, extreme micromelia, and severe respiratory distress is pathognomonic *Incorrect: Achondroplasia* - Most common **non-lethal** skeletal dysplasia also due to FGFR3 mutation - Features include short limbs and macrocephaly but **NO cloverleaf skull deformity** - Thorax is **relatively normal** - respiratory distress is not a feature - Compatible with life and normal intelligence *Incorrect: Osteogenesis imperfecta* - Characterized by **bone fragility** and multiple fractures, not micromelia - Craniofacial features include **blue sclera** and triangular facies, not cloverleaf skull - Caused by **collagen defects** (COL1A1/COL1A2 genes), not FGFR3 - Respiratory issues occur due to chest wall deformities from fractures, not small thorax *Incorrect: Achondrogenesis* - Another **lethal skeletal dysplasia** with severe micromelia and small thorax - However, it lacks the **characteristic cloverleaf skull deformity** and midfacial hypoplasia - Features include **severe trunk shortening**, hydrops fetalis, and markedly deficient ossification - Usually results in stillbirth or death within hours

Q: What is the dental condition shown in the image?

Fluorosis. ***Fluorosis*** - The image displays **dental fluorosis**, characterized by **white flecks, streaks, or brown staining** on the enamel surface, often accompanied by a mottled appearance. These changes result from **excessive fluoride intake** during tooth development. - In more severe cases, as seen here with the noticeable brown discoloration and pitting, the enamel can become **porous and discolored**, reflecting significant exposure to high levels of fluoride. *Megadont teeth* - **Megadontia (macrodontia)** refers to abnormally large teeth, which is not evident in the provided image. The size of the teeth appears within the typical range. - This condition is often associated with certain genetic syndromes or developmental anomalies, but the primary visual finding here is enamel discoloration, not size. *Dental caries* - **Dental caries**, or tooth decay, typically presents as **cavities or dark spots** caused by bacterial acid erosion of the enamel and dentin. - While some discoloration similar to early caries might be present, the widespread, mottled, and brown staining pattern across multiple teeth is more indicative of fluorosis rather than localized decay. *Dentinogenesis imperfecta* - **Dentinogenesis imperfecta** is a genetic disorder affecting dentin formation, leading to teeth that appear **opalescent or translucent with a blue-gray or amber hue**. - Teeth affected by dentinogenesis imperfecta are also prone to **rapid wear and fracture**, with characteristic radiographic findings such as bulbous crowns and obliterated pulp chambers, none of which are typically observed on external visual inspection for fluorosis.

Question 1

The reflex shown below disappears by what age?

Accepted Answer

3 months

Answer

1 month

Answer

2 months

Answer

4 months

Question 2

The image shows presence of:

Accepted Answer

Hemihypertrophy

Answer

Polydactyly

Answer

Phocomelia

Answer

Amniotic band sequence

Question 3

A child suffering from respiratory and feeding difficulties was brought for consultation. All of the following are to be considered in differential diagnosis of the child except:

Accepted Answer

Turner syndrome

Answer

Treacher Collins syndrome

Answer

Pierre-Robin syndrome

Answer

Velocardiofacial syndrome

Question 4

What is the expected karyotype in this child with the following findings and having pulmonic stenosis on Echocardiography?

Accepted Answer

46,XY

Answer

46,XX

Answer

45,X

Answer

47,XXY

Question 5

During evaluation of a child with Down syndrome, the following finding is noted. Identify?

Accepted Answer

Simian crease

Answer

Kennedy crease

Answer

Sydney line

Answer

Sandal gap

Question 6

Which of the following is associated with this condition?

Accepted Answer

Edward syndrome

Answer

Turner syndrome

Answer

Patau syndrome

Answer

Down syndrome

Question 7

During evaluation of a child with obesity, following finding is observed. What is the association?

Accepted Answer

Laurence-Moon-Bardet-Biedl syndrome

Answer

Prader-Willi syndrome

Answer

Beckwith-Wiedemann syndrome

Answer

Pseudo-pseudo-hypoparathyroidism

Question 8

This baby has obesity along with organomegaly. Comment on the diagnosis from the hint given in the image?

Accepted Answer

Beckwith-Wiedemann syndrome

Answer

Prader-Willi syndrome

Answer

Bell syndrome

Answer

Laurence-Moon-Bardet-Biedl syndrome

Question 9

Which of the following conditions is characterized by severe respiratory distress in newborns due to a small thorax, very short limbs, and a large head with midfacial hypoplasia and Cloverleaf skull deformity?

Accepted Answer

Thanatophoric dwarfism

Answer

Achondroplasia

Answer

Osteogenesis imperfecta

Answer

Achondrogenesis

Question 10

What is the dental condition shown in the image?

Accepted Answer

Fluorosis

Answer

Megadont teeth

Answer

Dental caries

Answer

Dentinogenesis imperfecta

Growth and Development — MCQs

Growth and Development — MCQs

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