Growth and Development — MCQs

A 6-year-old girl presents with a left breast mass. Her mother first noticed it a day before and is very concerned because both the child's maternal grandmother and maternal aunt have had breast cancer. It is firm, smoothly circumscribed, and slightly eccentric under the left areola. The right breast is unremarkable. You suggest:

Q685

True regarding breath holding spells are all EXCEPT:

Q686

Nocturnal enuresis should be investigated and treated after:

Q687

Birth weight triples at:

Q688

The initial signs of sexual maturity in boys usually include which combination of the following?

Q689

Which of the following is usually the first sign of puberty in girls?

Q690

Bilateral grasp is seen at what age?

Growth and Development Indian Medical PG Practice Questions and MCQs

Question 681: Causes of macrocephaly include all of the following except:

A. Neurofibromatosis
B. Rickets
C. Congenital CMV (Correct Answer)
D. Canavan disease

Explanation: ***Congenital CMV*** - **Congenital cytomegalovirus (CMV)** infection is a common cause of **microcephaly**, not macrocephaly, due to its destructive effects on the developing brain. - CMV can lead to **periventricular calcifications**, **hearing loss**, and developmental delays, all associated with a smaller head circumference. *Neurofibromatosis* - **Neurofibromatosis type 1 (NF1)** is a genetic disorder commonly associated with **macrocephaly**, often due to increased brain volume or associated benign tumors. - Brain abnormalities such as **focal areas of signal intensity (FASI)** seen on MRI are frequent in NF1 and can contribute to larger head size. *Rickets* - **Rickets**, a vitamin D deficiency, can lead to **craniotabes** (softening of the skull) and often presents with an enlarged or bossed frontal skull, contributing to **macrocephaly**. - This condition results from impaired mineralization of bone, which can affect the skull's shape and size. *Canavan disease* - **Canavan disease** is a rare, **autosomal recessive leukodystrophy** characterized by progressive neurological deterioration and often **macrocephaly**. - The macrocephaly in Canavan disease is due to **spongiform degeneration** of the white matter, leading to increased brain volume.

Question 682: In anthropometric assessment, which of the following does not show much change in 1-4 years ?

A. Mid arm circumference (Correct Answer)
B. Skin fold thickness
C. Height
D. Chest circumference: Head circumference ratio

Explanation: ***Mid arm circumference*** - From birth up to around **5 years of age**, the **mid-arm circumference (MAC)** does not change significantly. - This makes MAC a useful **screening tool** for diagnosing protein-energy malnutrition within this age range. *Skin fold thickness* - **Skinfold thickness** measurements, like those from the triceps, reflect subcutaneous fat stores and can change significantly with nutritional status and growth. - Changes in fat deposition occur rapidly during early childhood depending on energy intake and expenditure. *Height* - **Height** is a primary indicator of linear growth and changes considerably and consistently throughout childhood. - Significant increases in height (length) are expected over a 1-4 year period as a child grows. *Chest circumference: Head circumference ratio* - The **head circumference (HC)** grows rapidly during the first year of life, then slows, while **chest circumference (CC)** overtakes HC around the age of 1 year. - The ratio between these two measurements changes significantly as the child develops, making it an unreliable stable marker over several years in early childhood.

Question 683: Which of the following does not require radiograph?

A. Nance model analysis
B. Tanaka and Johnson (Correct Answer)
C. Stanley and Kerber
D. Hixon-Oldfather

Explanation: ***Tanaka and Johnson*** - This analysis is a **non-radiographic method** that uses empirical formulas based on the widths of the mandibular incisors to predict the size of unerupted canines and premolars. - It provides an estimation of the arch space required without exposing the patient to radiation. - Uses regression equations: Predicted width = (sum of lower incisors / 2) + correction factor *Nance model analysis* - This is a **non-radiographic method** that uses **brass wire measurements** on diagnostic study casts to assess arch length discrepancies. - Measures the mesiodistal widths of erupted teeth directly on the cast and uses **average tooth width tables** (not radiographs) to estimate the size of unerupted permanent canines and premolars. - Compares available arch length (measured with brass wire along the arch perimeter) to the required arch length (sum of tooth widths). *Stanley and Kerber* - This is a **radiographic prediction method** that uses periapical or panoramic radiographs to directly measure the mesiodistal widths of unerupted permanent teeth. - Measurements from radiographs are combined with cast measurements to predict arch space requirements more accurately than table-based methods. *Hixon-Oldfather* - This analysis requires **radiographs** (periapical or panoramic films) to measure the actual widths of unerupted mandibular canines and first premolars. - Combines radiographic measurements with regression equations based on the sum of mandibular incisor widths to predict maxillary and mandibular unerupted tooth sizes. - More accurate than non-radiographic methods but involves radiation exposure.

Question 684: A 6-year-old girl presents with a left breast mass. Her mother first noticed it a day before and is very concerned because both the child's maternal grandmother and maternal aunt have had breast cancer. It is firm, smoothly circumscribed, and slightly eccentric under the left areola. The right breast is unremarkable. You suggest:

A. Genetic testing for breast cancer (BRCA) 1 and 2 mutations
B. Repeat examination in 1 month (Correct Answer)
C. Immediate excisional biopsy
D. A mammogram

Explanation: ***Repeat examination in 1 month*** - The described mass in a 6-year-old girl is most likely **premature thelarche**, a benign condition characterized by isolated breast development without other signs of puberty. This condition often resolves spontaneously and usually requires only observation. - Given the child's age and the benign characteristics of the mass (firm, smoothly circumscribed, slightly eccentric), a follow-up examination in a month is appropriate to monitor for any changes, as many such lumps resolve or remain stable. Prompt intervention is usually not indicated unless there are concerning features or rapid growth. *Genetic testing for breast cancer (BRCA) 1 and 2 mutations* - While a family history of breast cancer might suggest genetic testing in an adult, it is generally **not recommended in children** in this scenario. Pediatric breast cancer is extremely rare, and positive genetic tests for BRCA mutations do not typically manifest with breast masses at this age. - The psychological impact and ethical considerations of genetic testing for cancer susceptibility in a young child without other clinical indications also weigh against this option. *Immediate excisional biopsy* - An immediate excisional biopsy is **overly aggressive** for a benign-appearing breast mass in a 6-year-old. Surgical intervention carries risks and often leaves scarring, which should be avoided unless malignancy is strongly suspected. - Given the high likelihood of a benign etiology like premature thelarche or a prepubertal breast bud, a period of observation is the standard of care before considering invasive procedures. *A mammogram* - **Mammography is not indicated** for breast masses in young children. The breast tissue in prepubertal girls is very dense, making mammograms difficult to interpret and often unhelpful. - Furthermore, mammography exposes the child to **radiation**, which should be avoided unless absolutely necessary given the relatively low diagnostic yield in this age group and clinical presentation.

Question 685: True regarding breath holding spells are all EXCEPT:

A. Attacks of cyanosis can occur
B. Occurs between 6 months to 5 years age
C. Antiepileptic treatment is necessary (Correct Answer)
D. Iron deficiency anemia is a risk factor

Explanation: ***Antiepileptic treatment is necessary*** - **Breath-holding spells** are a benign phenomenon and do not require **antiepileptic treatment**. This is a key distinguishing factor from seizure disorders. - Management typically involves reassurance, parental education, and addressing any potential underlying triggers like **iron deficiency anemia**. *Attacks of cyanosis can occur* - In **cyanotic breath-holding spells**, the child becomes blue due to a period of apnea and bradycardia, following a trigger like pain or fear. - This is a common and characteristic presentation, often alarming for parents but generally without long-term sequelae. *Occurs between 6 months to 5 years age* - **Breath-holding spells** typically manifest during infancy and toddlerhood, with peak incidence between 6 months and 2 years, often resolving by age 5. - This age range reflects the developmental stage where children are beginning to express strong emotions and reactions to stimuli. *Iron deficiency anemia is a risk factor* - **Iron deficiency anemia** is a recognized risk factor for breath-holding spells, and treating the anemia can reduce the frequency and severity of the spells. - The exact mechanism is not fully understood but may involve effects on neurotransmitter function or cardiovascular regulation.

Question 686: Nocturnal enuresis should be investigated and treated after:

A. 2 years
B. 3 years
C. 4 years
D. 5 years (Correct Answer)

Explanation: ***Correct: 5 years*** - **Nocturnal enuresis** is considered a normal developmental stage in children under 5 years of age - **DSM-5 and ICCS guidelines** specify that enuresis diagnosis requires the child to be at least **5 years old** (or equivalent developmental level) - Investigation and treatment are typically initiated after this age to rule out underlying medical conditions such as **urinary tract infections, diabetes, or anatomical abnormalities** - By 5 years, most children have achieved nighttime bladder control, making persistent bedwetting clinically significant *Incorrect: 2 years* - At 2 years, **bladder control** is still developing and **nocturnal enuresis** is universal and completely normal - Most children at this age have not yet achieved even daytime continence - No intervention or investigation is warranted at this developmental stage *Incorrect: 3 years* - By 3 years, some children may achieve nighttime continence, but **bedwetting remains very common** and developmentally normal - Intervention at this age is not recommended unless there are specific concerning symptoms like daytime incontinence or urinary stream abnormalities *Incorrect: 4 years* - While many children develop bladder control by 4 years, **nocturnal enuresis** can still be a normal occurrence - Most pediatric guidelines suggest waiting until **5 years of age** before considering bedwetting a clinical issue requiring formal investigation

Question 687: Birth weight triples at:

A. 2 years of age
B. 2.5 years of age
C. 9 months of age
D. 1 year of age (Correct Answer)

Explanation: **1 year of age** - A child's **birth weight** typically **triples** by their first birthday due to rapid growth during infancy. - This growth spurt is characteristic of the significant developmental changes occurring in the first year of life. *2 years of age* - By **2 years of age**, a child's weight is usually about **four times** their birth weight. - While significant growth continues, the tripling milestone is typically achieved earlier. *2.5 years of age* - A child would have more than tripled their birth weight by **2.5 years of age**, often reaching close to **four and a half times** their birth weight. - This period reflects continued, though slower, growth compared to infancy. *9 months of age* - At **9 months of age**, a child's birth weight is usually around **double**, not triple, the birth weight. - The tripling landmark is still a few months away at this stage.

Question 688: The initial signs of sexual maturity in boys usually include which combination of the following?

A. Development of Adam's apple and Voice changes
B. Growth spurt and Voice changes
C. Testicular enlargement and Pubic hair development (Correct Answer)
D. Development of Adam's apple and Facial hair

Explanation: ***Testicular enlargement and Pubic hair development*** - **Testicular enlargement** (testicular volume >4 mL) is the **first sign of puberty in boys**, typically occurring around age 11-12 years (Tanner stage 2). - **Pubic hair development** follows shortly after testicular enlargement as one of the initial secondary sexual characteristics. - These are recognized as the initial signs of sexual maturity according to Tanner staging. *Growth spurt and Voice changes* - The **growth spurt** (peak height velocity) occurs **mid-to-late in puberty** (Tanner stage 3-4), not initially. - **Voice changes** occur later in puberty due to laryngeal growth, after the initial testicular and pubic hair changes. - These are intermediate signs, not initial signs. *Development of Adam's apple and Voice changes* - The **prominent Adam's apple** (laryngeal prominence) and **voice deepening** are **later manifestations** of laryngeal growth. - These occur after testicular enlargement and pubic hair development. *Development of Adam's apple and Facial hair* - Both **prominent Adam's apple** and **facial hair** are **late secondary sexual characteristics** in boys. - These appear well after the initial signs of testicular enlargement and pubic hair development.

Question 689: Which of the following is usually the first sign of puberty in girls?

A. Onset of menstruation
B. Change in voice
C. Increase in breast size (Correct Answer)
D. Appearance of pubic hair

Explanation: ***Increase in breast size*** - **Thelarche**, or the development of breast buds, is typically the **first physical sign of puberty** in girls, usually occurring between ages 8 and 13. - This is driven by increasing levels of **estrogen** produced by the ovaries. *Onset of menstruation* - **Menarche**, or the first menstrual period, is a **later pubertal event**, usually occurring about 2-3 years after the onset of breast development. - It signifies the maturation of the **hypothalamic-pituitary-ovarian axis**. *Change in voice* - A noticeable change in voice, leading to a deeper tone, is a characteristically **male secondary sexual characteristic** in puberty. - While slight voice changes can occur in girls, it is not considered the primary or first sign of female puberty. *Appearance of pubic hair* - The appearance of pubic hair, known as **pubarche**, is usually the **second sign of puberty** in girls, following thelarche. - This development is primarily driven by **adrenal androgens**.

Question 690: Bilateral grasp is seen at what age?

A. 6 months
B. 3 months
C. 9 months
D. 5 months (Correct Answer)

Explanation: ***5 months*** - At **5 months**, infants typically develop the ability to **reach for and grasp objects with both hands**, demonstrating improved coordination and control. - This age marks a transition from reflexive grasping to more intentional and bilateral manipulation of objects. *6 months* - While fine motor skills continue to develop at 6 months, **bilateral grasp** is usually well-established by this age, having emerged earlier. - At 6 months, infants are often progressing towards **unilateral grasp** and transferring objects between hands. *3 months* - At **3 months**, infants are typically still developing head control and beginning to reach, but their grasp is often still a **reflexive palmar grasp** rather than intentional bilateral grasping. - Reaching at this age is usually more swiping or batting at objects rather than a coordinated grasp. *9 months* - By **9 months**, infants have developed more refined pincer grasp and are capable of complex manipulation of objects with a single hand. - **Bilateral grasp** is a much earlier developmental milestone than the advanced skills seen at 9 months.

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

Practice Questions

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