a Class B3 TB in the past; however, Class B3 has been omitted from the classification scheme because it has not been found to be associated with active TB. Minor musculoskeletal findings - Minor findings needing no follow-up. Minor cardiac findings - Minor findings needing no follow-up. Extrapulmonary tuberculosis Peritoneal tuberculosis may mimic peritoneal carcinomatosis on CT scan. There is low-quality evidence that abdominal ultrasound has 63% sensitivity and 68% specificity in diagnosing abdominal tuberculosis when tuberculosis is bacteriologically confirmed in HIV-positive individuals. Therefore, a negative abdominal ultrasound finding does not rule out the disease due to its low sensitivity. References External links Additional X-ray images Chest X-ray Atlas - Select Diseases|Tuberculosis for TB CXR case studies (X-ray pictures showing cavities, infiltrates, scarring, pleural effusion, interstitial nodules of military TB, and TB spine) - from Loyola University Chicago Stritch School of Medicine © Teaching File Radiology of Tuberculosis Projectional radiography Tuberculosis