From the case:
Pigmented villonodular synovitis (PVNS)
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/8641/annotated_viewer_json?lang=us"}
Hyperdense expansion of the joint capsule with bony erosions.
From the case:
Pigmented villonodular synovitis (PVNS)
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/8642/annotated_viewer_json?lang=us"}
Nodular hypertrophy of the knee synovium with low signal on both T1 and T2 weighted sequences, consistent with pigmented villonodular synovitis. Note the erosions of the adjacent bones.
Case Discussion
Case courtesy of Bob Cook, MD. Western Memorial Regional Hospital Corner Brook, Newfoundland.
Editor's note: Per the 2020 WHO Soft Tissue and Bone Tumors Classification (5th ed.), the recommended terminology is tenosynovial giant cell tumor with pigmented villonodular synovitis no longer recommended (although remains in common use).
Unable to process the form. Check for errors and try again.