Which finding on chest X-ray is associated with TB infection?

Which finding on chest X-ray is associated with TB infection?

• A. Chest x-ray identifying tubercles
• B. Ultrasound of liver
• C. EEG
• D. Normal chest x-ray only

Answer: (A)

Tuberculosis prompts granulomatous inflammation in the lungs, and the chest X-ray can reveal the small nodular lesions known as tubercles. These tubercles are classic radiographic signs of TB infection and reflect the immune response to the bacteria. In primary TB you might also see a Ghon complex, consisting of a calcified focus and involved lymph nodes, but the key idea is that identifying tubercles on radiographs points directly to TB involvement. Other tests listed aren’t related to pulmonary TB imaging: ultrasound of the liver is for liver pathology, and EEG assesses brain electrical activity. A normal chest X-ray can occur with latent TB, but it wouldn’t show the infection on imaging, whereas tubercles provide the direct radiographic association.

Tuberculosis prompts granulomatous inflammation in the lungs, and the chest X-ray can reveal the small nodular lesions known as tubercles. These tubercles are classic radiographic signs of TB infection and reflect the immune response to the bacteria. In primary TB you might also see a Ghon complex, consisting of a calcified focus and involved lymph nodes, but the key idea is that identifying tubercles on radiographs points directly to TB involvement.

Other tests listed aren’t related to pulmonary TB imaging: ultrasound of the liver is for liver pathology, and EEG assesses brain electrical activity. A normal chest X-ray can occur with latent TB, but it wouldn’t show the infection on imaging, whereas tubercles provide the direct radiographic association.