摘要
BACKGROUND Synchronous colorectal carcinomas(SCRC)are two or more primary colorectal carcinomas identified simultaneously or within 6 mo of the initial presentation in a single patient.Their incidence is low and the number of pathological types of SCRC is usually no more than two.It is very unusual that the pathological findings of a patient with SCRC show more than two different pathological subtypes.Here,we report a rare case of SCRC with three pathological subtypes.CASE SUMMARY A 75-year-old woman who had no previous medical history or family history was admitted to the hospital because of intermittent hematochezia for more than a month.Colonoscopy displayed an irregularly shaped neoplasm of the rectum,a tumor-like lesion causing intestinal stenosis in the descending colon,and a polypoidal neoplasm in the ileocecum.Subsequently,she underwent total colectomy,abdominoperineal resection for rectal cancer,and ileostomy.After operation,the pathological report showed three pathological subtypes including well-differentiated adenocarcinoma of the ascending colon,moderately differen-tiated adenocarcinoma of the descending colon,and mucinous adenocarcinoma of the rectum.She is now recovering well and continues to be closely monitored during follow-up.CONCLUSION Preoperative colonoscopy examination,imaging examination,and extensive intraoperative exploration play important roles in reducing the number of missed lesions.
