Synovial lipoma in intra-patellar fat pad of the knee joint

Intra-articular synovial lipoma is an unusual tumorous pathologically benign condition and only a small number of case reports have been published to date. This manuscript describes the case of a 19-year-old adolescent who presented with right knee pain and loss of movement caused by an intra-articular synovial lipoma of the knee joint. A MRI scan revealed an intra-articular soft tissue neoplasm within the lateral compartment of the joint. Arthroscopy confirmed an encapsulated neoplasm that arose from the intra-patellar fat pad, and extended to the lateral compartment and trochlear groove. Additionally, histological analysis revealed synovial lipoma.