Colonic aggressive fibromatosis with perforation: a case report

Aggressive fibromatosis (AF) is a rare soft tissue tumor derived from mesenchymal tissue characterized by invasion into the surrounding muscle and soft tissue growth without distant metastasis. Although AF originates from the mesentery, omentum, and pelvis and has been described, primary AF originating from the colon has rarely been reported. In this case, an 18-year-old male patient with sudden left lower abdominal pain for 10 hours with nausea and vomiting was admitted to the hospital for an emergency medical examination. Imaging revealed a mass located near his sigmoid colon that was considered interstitial or malignant. The patient underwent urgent exploratory surgery, and perforation of the tumor was found. Histopathological examination showed that the tumor was colonic AF. Considering the patient's medical history of acute abdomen pain, we assume this to be a rare case of colonic AF with perforation.