Tumor Recurrence at the Colostomy Site: A Rare Case Report and Literature Review

Recurrence at the site of a colostomy is a rare event, though it has been documented in the literature. The time to development of carcinoma at a colostomy site after the initial diagnosis varies, ranging from 5 months to 35 years post-surgery, with a median of 22 years. This condition is generally associated with a poor prognosis.We report the case of a patient who initially underwent colostomy for an obstructive left-sided colon adenocarcinoma. This was followed by radical surgery with clear resection margins. Despite this, the patient later developed a recurrence at the site of the former colostomy.The recurrent mass was surgically removed, including excision of the lesion and re-excision of the surgical margins. In this case, the most plausible explanation for the recurrence is direct invasion of the abdominal wall by tumor cells.This case highlights the importance of regular follow-up and thorough examination of stoma sites, as there remains a rare but significant risk of tumor recurrence in these areas.