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Juxta-articular chondroma Kaposi's Sarcoma Large cell lymphoma, Leimyosarcoma, Leiomyosarcoma, Letterer-Siwe disease, Leukemia, Low-grade intramedullary osteogenic sarcoma, Lumbosacral lipoma, Lymphangioma, Lymphangiomatosis, Lymphoma, Lymphoma pseudotumor (Actual: radiation osteitis), Lymphoma pseudotumor (Actual: stress fracture), Lymphoma with secondary osteogenic sarcoma Maffucci's Syndrome, Maligant fibrous histiocytoma pseudotumor (Actual: Hematoma), Malignant fibrous histiocytoma (MFH).
Synovial chondromatosis - Knee - Photomicrograph
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Synovial chondromatosis - Knee - Photomicrograph
  • Case ID: 366
  • Diagnosis: Synovial chondromatosis
  • Category: Soft Tissue Tumors
  • Category Type: Cartilaginous
  • Category Sub Type: Benign
  • Location: Knee
  • Age: 28
  • Sex: F
  • Treatment: Synovectomy
  • Image ID: 2485
  • Image Type: Photomicrograph
  • Images relating to this case: 2483 , 2484 , 2485.

Low power photomicrograph reveals embryonic cartilage arising from the subsynovial tissue obtained at the time of the subtotal synovectomy. There was no evidence of degenerative osteoarthritis at the time of surgery. Because of the young age of the patient and the presence of primitive chondroid tissue in the synovial tissue, the diagnosis is primary osteochondromatosis.


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