Interactive Quiz: Pain and Swelling in the Thigh

Answer: Colonoscopy

Colonoscopy showed normal-appearing rectal mucosa (Figure 5). Histopathology results of a biopsy specimen suggested nonspecific colitis and showed colonic intraepithelial lymphocytosis (15-20+ lymphocytes per 100 epithelial cells) with surface epithelial damage and increased mixed inflammatory cells within the lamina propria in a patchy distribution (Figure 6).

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