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Acral synovial chondrosarcoma
D E Wenger1, M Sundaram, K K Unni
1Department of Radiology, Mayo Clinic, 200 First Street, SW, Rochester, MN 55905, USA.
Skeletal Radiology
|February 6, 2002
Summary
This study reports an extremely rare case of acral synovial chondrosarcoma in a 69-year-old man. The tumor, mimicking gout radiographically, originated from the synovium without prior signs of synovial chondromatosis.
Area of Science:
- Orthopedic Oncology
- Musculoskeletal Pathology
- Radiology
Background:
- Acral chondrosarcomas are rare bone tumors.
- Synovial chondrosarcoma is a rare subtype, typically arising from joint synovium.
- Chondrosarcoma without concurrent synovial chondromatosis is exceptionally rare.
Observation:
- A 69-year-old male presented with a rare acral synovial chondrosarcoma affecting the thumb's metacarpophalangeal joint.
- Radiographic imaging mimicked gout, while MRI suggested synovial chondromatosis due to lobulated soft tissue mass contours.
- Histological examination confirmed chondrosarcoma arising from the synovium.
Findings:
- The tumor invaded metacarpophalangeal joint cartilage.
- Bone destruction involved the distal metacarpal and proximal phalanx base.
- Bony joint surfaces were notably spared by the tumor invasion.
Implications:
- Highlights the diagnostic challenge of rare acral synovial chondrosarcoma, especially when mimicking other conditions like gout.
- Emphasizes the importance of integrating imaging findings with histopathology for accurate diagnosis.
- Contributes to understanding the rare presentation and behavior of synovial chondrosarcoma in the acral region.