Fig. 7
From: Inflammatory and infectious manifestations of immunodeficiency in the gastrointestinal tract
This patient presented with right lower quadrant pain and a mass on physical examination. Biopsy samples from an ileocecal valve mass revealed confluent, centrally necrotic granulomata in the submucosa a. A histochemical stain for acid fast bacilli (AFB) demonstrates numerous curved rods, consistent with M. tuberculosis b. A patient with AIDS underwent upper endoscopy for evaluation of abdominal pain and diarrhea. Biopsy specimens from the duodenum show macrophages filling the lamina propria c. Intracellular bacilli, consistent with MAI, are seen on a Ziehl–Neelsen stain d. (Hematoxylin and eosin a, c Ziehl–Neelsen stain b, d; original magnification: × 200 a; × 600 b; × 400 c, d)
