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Updated: Sep 25, 2025

Intradermal Inoculation of Mycobacterium avium in the Mouse Ear
Published on: July 3, 2025
Gastrointestinal infection by Mycobacterium avium with an unusual endoscopic presentation
Gina Patricia de Lima Piña1, Juan Carrascosa Gil2, Luis Alfonso Díaz Galvis3
1Anatomía Patológica, Hospital Universitario de Navarra, España.
Abstract:
A 38-year-old male with medical history of HIV group C3 with voluntary abandonment of antiretroviral therapy, was hospitalized due to general deterioration, abdominal pain, diarrhea and rectal bleeding without signs of acute abdomen. The patient presented anemia, renal and hepatic dysfunction, and metabolic acidosis. Abdominal CT and CT angiography were performed without observing signs of perforation or active bleeding. In the same year, he was also diagnosed of intestinal Cryptosporidiosis, cutaneous Kaposi's sarcoma and disseminated infection by Mycobacterium avium (MA) with lung, liver and bone marrow involvement. Panendoscopy was performed, showing violaceous lesions on the soft palate. In the stomach and duodenum, he presented multiple, large, well-defined and occasionally confluent red-violet lesions Colonoscopy did not show macroscopic alterations.
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