Carcinoma Cuniculatum: A Rare Cause of a Gastroesophageal Junction Mass

A 68-year-old man presented with several months of progressive dysphagia and 50-pound weight loss. Endoscopy revealed a firm mass at the gastroesophageal junction (Figure A). Multiple biopsies including fine-needle biopsy returned atypical squamous proliferation, most consistent with reactive changes (Figure B). Endoscopic ultrasound and cross-sectional imaging, including a positron emission tomography scan demonstrating a highly positron emission tomography avid mass with no evidence of spread, suggested a T3 lesion.

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