Osteolipoma of the knee

Tien Phat V. Huynh, Cara A. Cipriano, Ian S. Hagemann, Michael V. Friedman

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

A case of a right knee intra-articular osteolipoma in a 64-year-old man is reported. The patient presented for evaluation of a 1-year history of nontraumatic, mechanically-exacerbated, medial-sided right knee pain. Radiographs demonstrated a partially calcified 3.0 cm mass anterior to the distal medial femur at the suprapatellar fossa. Magnetic resonance imaging examination confirmed a 4.0 × 3.6 cm well-circumscribed mass deep to the medial patellofemoral ligament, with predominantly fat characteristics on T1-weighted and T2-weighted sequences. The mass had irregular ossification superiorly with surrounding heterogeneous enhancement. Histologic examination of an excisional biopsy showed the lesion to be an osteolipoma. Osteolipoma is a rare histologic variant of lipoma with osseous metaplasia, but should be considered in the differential of a fat-containing neoplasm with ossification.

Original languageEnglish
Pages (from-to)124-129
Number of pages6
JournalRadiology Case Reports
Volume12
Issue number1
DOIs
StatePublished - Mar 1 2017

Keywords

  • Knee joint
  • Ossifying lipoma
  • Osteolipoma

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