J Korean Orthop Assoc.  2022 Jun;57(3):249-253. 10.4055/jkoa.2022.57.3.249.

Extra-Articular Chondrolipoma of the Knee

  • 1Department of Orthopaedic Surgery, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea


Chondrolipoma is a rare benign mesenchymoma containing mature cartilage and adipose tissues. Chondrolipoma has been encountered mainly in the oral cavity and breast; however, this type of mesenchymoma occurs extremely rarely in the knee area. This paper reports a case of a 60-year-old woman who presented with a two-year history of a palpable mass lesion at the anterior side of the left knee. Magnetic resonance imaging showed a mass lesion adjacent to the medial side of the patellar tendon. The mass had a heterogenous nature, consisting of fat components and calcification. Surgical excision was performed. The size of the excised mass was approximately 4.5 cm×3 cm×4 cm, and it had a round shape and was encapsulated. The posterior part of the mass had a mixed pattern comprised of fat and cartilage tissues. A pathological examination showed that the chondrolipoma was composed of mature adipose and hyaline cartilage tissues.


chondrolipoma; mesenchymoma; knee
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