Abstract
BackgroundCarcinomas occurring at colostomy sites are rare, and most of these are metachronous colorectal cancers. The median time between colostomy and development of a carcinoma at a colostomy site is 22 years, which exceeds the length of the recommended follow-up period. We report a rare case of a carcinoma of the transverse colon occurring at a colostomy site in a patient without a history of colorectal cancer.Case reportAn 89-year-old woman presented with a tumor occurring at a colostomy site. Thirty-five years previously, she had undergone a transverse loop colostomy for an iatrogenic colon perforation that occurred during left ureteral lithotomy. Upon physical examination, the patient had a hard nodule measuring 3 cm at the colostomy site. A biopsy of the nodule suggested adenocarcinoma, and the preoperative diagnosis was transverse colon cancer. A laparotomy was performed via a peristomal incision with 5-mm skin margins, and the tumor was covered by a surgical glove to avoid any tumor seeding. The colon was separated from the tumor by 5-cm margins, and the specimen was removed en bloc. An end colostomy was constructed to a new site on the right side of the abdomen. The deficit in the abdominal wall was repaired, and the skin was closed via a purse-string suture. The final diagnosis of the stoma tumor was transverse colon cancer (T2, N0, M0, stage I). One year and five months after surgery, there was no evidence of recurrence.ConclusionsThe occurrence of carcinomas at colostomy sites in patients without a history of colorectal cancer is rare. It is important to train ostomates to monitor the stoma for possible tumor recurrence.
Highlights
Carcinomas occurring at colostomy sites are rare, and most of these are metachronous colorectal cancers
It is important to train ostomates to monitor the stoma for possible tumor recurrence
Carcinomas occurring at colostomy sites are rare, with only 12 cases previously reported in the English literature (Table 1); most of these are metachronous colorectal cancers
Summary
Carcinomas occurring at colostomy sites are rare, with only 12 cases previously reported in the English literature (Table 1); most of these are metachronous colorectal cancers. We describe a case of an 89-year-old woman who presented with a colostomy tumor 35 years after undergoing a transverse colostomy for iatrogenic colon perforation, and we review the literature related to this malignancy. Case presentation An 89-year-old Japanese woman with a 1-month history of stoma bleeding was referred to our hospital. She had undergone a transverse loop colostomy 35 years previously for an iatrogenic colon perforation that occurred during left ureteral lithotomy. The patient was found to have a hard nodule at the colostomy site, measuring 3 cm (Figure 1). The final diagnosis of the stoma tumor was transverse colon cancer (T2, N0, M0, stage I). The study was conducted according to the Declaration of Helsinki
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