Osteochondrolipoma Presenting as a Popliteal Cyst

Area of Science:

• Orthopedics
• Radiology
• Pathology

Background:

• Popliteal masses can present diagnostic challenges.
• Differentiating benign conditions from rare tumors is crucial for appropriate patient management.

Observation:

• A 63-year-old woman presented with knee pain and a popliteal fossa mass.
• Initial imaging suggested a simple cyst, but radiography revealed bony fragments.
• Ultrasound-guided biopsy and MRI were performed, followed by excisional biopsy.

Findings:

• Histological examination confirmed the mass as an osteochondrolipoma.
• This rare tumor exhibits features of lipoma with cartilaginous and osseous differentiation.

Implications:

• Osteochondrolipomas should be considered in the differential diagnosis of popliteal masses.
• Comprehensive evaluation, including advanced imaging and biopsy, is essential for accurate diagnosis.
• Misdiagnosis of popliteal masses can lead to delayed or incorrect treatment.