A 6-year-old girl having severe muscle wasting, delayed growth and increased susceptibility to infection. What will be the ideal supplement?

Appeared in: SGPGI Nursing Officer-2023

Explanation

Cobalamin (Vitamin B12) is the only option that comprehensively explains the triad of symptoms presented.
Its deficiency causes neurological damage (subacute combined degeneration of the cord), leading to the observed muscle wasting and weakness.
It also results in megaloblastic anemia, which impairs oxygen transport and contributes to delayed growth and fatigue.
Vitamin B12 is vital for the proliferation of immune cells; its deficiency impairs the immune response, leading to increased susceptibility to infections.

Option A: Thiamine (B1) deficiency causes Beriberi. While 'dry' beriberi involves peripheral neuritis and muscle wasting, it does not typically present with the prominent immune suppression and growth failure seen in the patient.
Option B: Riboflavin (B2) deficiency, or ariboflavinosis, primarily manifests with mucocutaneous symptoms such as cheilosis (cracks at the corners of the mouth), glossitis (sore tongue), and seborrheic dermatitis. It does not cause severe muscle wasting or significant growth delay.
Option D: Folate (B9) deficiency also causes megaloblastic anemia, which can explain delayed growth. However, it does not cause the neurological damage that is characteristic of B12 deficiency. Therefore, it cannot account for the severe muscle wasting.

Clinical Relevance

Nursing practice connection: Knowing Diagnosis of vitamin deficiencies from clinical symptoms helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
A critical nursing responsibility is to differentiate between folate and B12 deficiency. Administering folate to a B12-deficient patient can correct the anemia but will not stop, and may even worsen, the irreversible neurological damage.
Infants of mothers on strict vegan diets are at high risk for B12 deficiency, as this vitamin is found almost exclusively in animal products. Early recognition is key to preventing developmental delays.
What if? If the child presented with megaloblastic anemia but had no neurological symptoms, Folate deficiency would be an equally likely diagnosis, and both levels should be checked before starting supplementation.

How to Approach the Question

First, identify the key clinical features presented in the question: 1) severe muscle wasting, 2) delayed growth, and 3) increased susceptibility to infection.
Consider how each of the B-vitamin deficiencies listed in the options manifests.
Evaluate which deficiency best explains the entire cluster of symptoms, not just one or two.
Recognize that severe muscle wasting often implies neurological involvement.
Eliminate Riboflavin (B2) and Folate (B9) as they do not typically cause significant neurological symptoms leading to muscle wasting.
Compare Thiamine (B1) and Cobalamin (B12). While both can cause muscle wasting, Cobalamin (B12) deficiency provides a more complete explanation for the combination of neurological, growth, and immune system problems.

Concept Tested & Keywords

Concept Tested: Diagnosis of vitamin deficiencies from clinical symptoms.
Stem keywords: 6-year-old, severe muscle wasting, delayed growth, increased susceptibility to infection
Lead-in keywords: ideal supplement
Clinical cues: The combination of neurological (muscle wasting), hematological (delayed growth), and immunological (infection) symptoms is a key clue.

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E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 108-110

Practise the full SGPGI Nursing Officer-2023

Attempt every question from this paper in a timed mock, then review the full solution for each one.