Most common site of extra thoracic TB in children?

OSSSC Nursing Officer-2023

Child Health Nursing (Pediatrics)

Easy

Appeared in: OSSSC Nursing Officer-2023

Explanation

Lymph node involvement, known as tuberculous lymphadenitis or scrofula, is the most frequent presentation of extrapulmonary tuberculosis (EPTB) in the pediatric population.
This condition typically arises from the lymphatic spread of Mycobacterium tuberculosis following a primary infection.
The cervical (neck), submandibular, and supraclavicular lymph nodes are most commonly affected.
Clinically, it presents as a slow-growing, painless, firm, and often matted mass of lymph nodes, which can sometimes break down to form a draining sinus.

Option B: Skeletal TB, while a serious manifestation, is not the most common form of EPTB in children. It is less frequent than lymph node involvement.
Option C: Central nervous system (CNS) involvement, particularly tuberculous meningitis, is the most severe and life-threatening form of EPTB in children, but it is not the most common.
Option D: Cardiac TB, most commonly presenting as tuberculous pericarditis, is a very rare complication of tuberculosis in children, occurring in less than 4% of cases.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Epidemiology of pediatric extrapulmonary tuberculosis (EPTB) as background academic context rather than a clinical decision trigger.
Nurses should maintain a high index of suspicion for TB in any child presenting with persistent, painless lymphadenopathy, especially in the neck region.
Patient and family education is a critical nursing role, emphasizing the importance of strict adherence to the long course of anti-tubercular therapy (ATT) to ensure a cure and prevent drug resistance.
What if? If the child were immunocompromised (e.g., due to HIV), the risk of disseminated (miliary) TB, involving multiple organs simultaneously, would be significantly higher, and the clinical presentation might be more acute and severe.

How to Approach the Question

First, break down the question to its key components: 'most common site', 'extra thoracic TB' (outside the chest), and 'in children'.
This is a factual recall question that tests your knowledge of the epidemiology of tuberculosis.
Recall the different forms of extrapulmonary TB. Think about which form is most classically associated with the pediatric population.
Tuberculous lymphadenitis, or 'scrofula', is a well-known and the most frequent manifestation of EPTB in children.
Evaluate the other options. CNS and cardiac TB are known to be severe but rare. Skeletal TB is significant but less common than lymph node involvement.
Select the option that represents the highest frequency based on established medical knowledge.

Concept Tested & Keywords

Qa4jAl7cbQBcJbzLO7HMbL

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1847-1849

E6 Medicine Harrison 22e Part 1 p. 1428-1430