Nonclassic Histologic Variants of Kaposi Sarcoma With Nonspecific Endoscopic Inflammatory Patterns: A Near-Miss Diagnosis Lookout in Gastrointestinal Tract Biopsies

GI-KS often presents with nonspecific endoscopic and histologic findings, frequently mimicking benign reactive and inflammatory conditions. Awareness of the morphologic diversity of KS on limited biopsy material in the setting of immunosuppression is crucial for pathologists to actively consider this diagnosis even in the absence of known cutaneous KS or an endoscopic masslike lesion.