Solitary Fibrous Tumor Low Rectum Simulating Cancer

Abstract

Introduction: The solitary fibrous tumor is a benign mesenchymal tumor of rare extra-pleural location. We report a case of solitary fibrous tumor observed in the lower rectum simulating cancer. The objective was to discuss the diagnostic and therapeutic management of the solitary fibrous in Madagascar. Observation: This is a sixty-five-year-old man, seen in consultation for dyskinesia, with no family history of neoplasia. The digital rectal examination revealed a large, non-budding, firm mass at the level of the right posterolateral surface with a lower pole located 2 cm from the anal margin, the remains of the physical examination are normal. Abdominal computed tomography showed a mass measuring 8 × 7 × 5.5 cm at the expense of the rectal wall of regular tissue density, without a mesenteric node or secondary localization. the biopsy had not found any malignant cells. This result is due to insufficiently deep biopsy samples of the mass, which led us to perform a complete surgical excision by coloprotectomy. The operative follow-up to which was simple. Immunohistochemical study of the surgical specimen confirmed the diagnosis with a positive CD 34 marker. The outcome was favourable without metastasis or recurrence after a six-month follow-up. Conclusion: The rectal localization of the solitary fibrous tumor is exceptional. The diagnosis is histological confirmed by the immunohistochemical study with a positive CD 34 marker.