The similarity of a desmoid tumor with parasitic leiomyoma: a very rare case report and literature review

Introduction: Desmoid tumors are rare cases that arise from aponeurotic tissue. Parasitic leiomyoma is a rare type of leiomyoma that grows in reproductive age, but differential diagnostics have something in common. Case report: A case of a 34-year-old Asian woman, secundigravida, outpatient clinic, referred from surgery division with chief complaint of a lump in the stomach that has become bigger in the past 4 years. There was no menstrual complaint, and the patient had a history of one previous cesarean section. Computed Tomography (CT) revealed a mass on the abdominal wall that extends to the abdominal cavity, and the patient underwent a mass biopsy and the histopathology results were obtained in the form of uterine leiomyoma or fibroid. During the operation, the mass was obtained from the abdominal wall and had no connection to internal reproductive organs, and due to the large mass, we consulted to digestive surgery division for mass resection, and a mesh graft was placed. Based on the results of tissue examination, the desmoid fibromatosis tumor was obtained from histological findings. Conclusion: Preoperative management by performing magnetic resonance imaging (MRI) can be useful to evaluate the difference between both diseases. Immunohistochemistry stain should be performed to differentiate between both diseases in case the MRI unavailable.