Imaging of Parosteal Lipoma: A Case Report

Abstract

Parosteal lipoma is an extremely rare benign tumor, accounting for 0.3% of all lipoma. They are often located in the lower limbs, contiguous to the periosteum, and associated with osseous changes. We present a case of a parosteal lipoma appearing in the distal femur with a bony excrescence in a 57-year-old female patient, presenting with a painless soft tissue mass that had been progressing for 10 years. Imaging showed a juxta cortical adipose mass, located in the mid and distal left femoral diaphysis, with adjacent cortical thickening, and osseous excrescences.