A rare case of solitary fibrous tumour of the sigmoid mesocolon: imaging features and review of literature.

Solitary fibrous tumours are rare spindle cell tumours that generally arise from the pleura but on rare occasions arise in other locations such as the head and neck region, stomach and retroperitoneum. Very few reports exist on the imaging findings of these tumours in extra pleural sites such as the mesentery. We report the computed tomography (CT) imaging findings of a rare case of solitary fibrous tumour in a 68-year-old man who presented with a slowly enlarging painless pelvic mass. CT scan showed a well-defined, multilobulated, highly vascular pelvic mass with dense calcifications and central hypoatteunating areas arising from the mesentery.