A CASE OF TRANSVERSE COLON CANCER THAT UNDERWENT SPONTANEOUS REGRESSION AFTER BIOPSY

Abstract

The patient was a 73-year-old man with positive_fecal occult blood test. Colonoscopy revealed a lesion in the transverse colon. Histopathological analysis of a biopsy specimen indicated that the lesion was a moderately differentiated tubular adenocarcinoma, and was thus a candidate for surgical colectomy. When the preoperation endoscopy was performed on the 80th day after the first endoscopic examination, the lesion in the transverse colon had become a scar. Laparoscopic-assisted right hemicolectomy was performed. However, pathological examination of the surgical specimen revealed no neoplastic cells. Thus, it was believed that spontaneous regression of the malignant tumor had occurred.