In a child with a positive tuberculin skin test, which test should be used to evaluate for active tuberculosis disease?

In a child with a positive tuberculin skin test, which test should be used to evaluate for active tuberculosis disease?

• A. Chest X-ray
• B. Sputum culture
• C. CT chest
• D. Bronchoscopy

Answer: (A)

When evaluating someone with a positive tuberculin skin test, the first step to look for active disease is a chest X-ray. This imaging helps identify signs of active pulmonary tuberculosis, such as infiltrates, consolidation, nodules, cavitation, or hilar lymphadenopathy. In children, chest radiographs are a practical, noninvasive way to screen for active disease and to see patterns that might differ from adults, like prominent hilar or mediastinal lymphadenopathy. Sputum culture is definitive for confirming active TB, but obtaining a good sample from a child can be difficult and results take time, so it’s not the initial screening test. A CT chest provides more detail but exposes the patient to more radiation and is not typically the first test after a positive skin test. Bronchoscopy is invasive and reserved for specific situations where more direct sampling or visualization is needed.

When evaluating someone with a positive tuberculin skin test, the first step to look for active disease is a chest X-ray. This imaging helps identify signs of active pulmonary tuberculosis, such as infiltrates, consolidation, nodules, cavitation, or hilar lymphadenopathy. In children, chest radiographs are a practical, noninvasive way to screen for active disease and to see patterns that might differ from adults, like prominent hilar or mediastinal lymphadenopathy.

Sputum culture is definitive for confirming active TB, but obtaining a good sample from a child can be difficult and results take time, so it’s not the initial screening test. A CT chest provides more detail but exposes the patient to more radiation and is not typically the first test after a positive skin test. Bronchoscopy is invasive and reserved for specific situations where more direct sampling or visualization is needed.