12 July 2025
: Case report 
HIV-Negative African American Man with Gastrointestinal Kaposi Sarcoma Associated with Adalimumab Treatment for Cardiac Sarcoidosis: A Case Report
Challenging differential diagnosis, Unusual setting of medical care, Rare disease, Adverse events of drug therapy
Vaishnavi Ghantasala ABEF 1, Aadi Palvia BF 2, Abhiram Rao Damera BF 3, Marcela Salomao DE 4, Lucinda A. Harris DE 5, Jana G. Hashash CEF 6, Karthik Gnanapandithan AE 7*DOI: 10.12659/AJCR.947163
Am J Case Rep 2025; 26:e947163
Figure 4 (A) Colonic biopsy of polypoid lesion shows a proliferation of spindle cells with few blood-filled channels (arrowheads). (B) Positive LNA-1 immunohistochemistry confirms the diagnosis of Kaposi sarcoma (A: Hematoxylin-eosin stain, 300× magnification; B: LNA-1 immunohistochemical stain, 300× magnification).