An extremely rare neoplasm ‘atypical spindle cell pleomorphic lipomatous tumor’: a case report

Abstract

Spindle cell lipoma is a rare histological variant of lipoma accounting for 1.5% of adipocytes tumors. It is composed of an admixture of mature adipocytes and fibroblast-like spindle cells in a myxoid stroma. Retroperitoneal atypical spindle cell lipomatous tumor are extremely rare only a single report in the literature reported. Herein we describe a case of a giant lipomatous tumor that was causing partial bowel obstruction. Successful excision with en block resection of the tumor, distal ureter and posterior wall of the bladder was achieved by teamwork between gastrointestinal surgeons and Urologist. The bladder defect was repaired, and left ureteric reimplantation was done. The patient made a good recovery with excellent progress. He has resumed his normal activities as a farmer.

Pediatric case of atypical spindle cell/pleomorphic lipomatous tumor within the vastus lateralis muscle

“…The case presented here is unique due to the patient’s age and the location of the tumor. Most reported cases of ASPLT occur in adults, with a slight male predominance [ 1 ]. The tumor in this case was located within the vastus lateralis muscle, which is a less common location.…”

“…They are often associated with a small risk of local recurrence following marginal excision. These tumors are characterized by ill-defined margins and the presence of variable proportions of mild to moderate atypical spindle cells, adipocytes, lipoblasts, pleomorphic cells, multinucleated giant cells, and a myxoid or collagenous extracellular matrix [ 1 ]. ASPLT typically arises from soft subcutaneous tissues of extremities, shoulder, head, neck region, and in the deep soft tissue of extremities.…”