Pigmented Villonodular synovitis Wheeless

Description: Pigmented Villonodular synovitis - Discussion: - pigmented villonodular synovitis is a slow growing, benign, and locally invasive tumor of the synovium; - location: most often involves the knee (also in hip, ankle, elbow ect.); - always consider PVNS in a younger patient with unexplained hip pain; - acute episodic attacks of pain and swelling may occur; - patients may have mechanical symptoms (locking and catching); - most have hemorrhagic, dark brown synovial fluid; - biopsy is diagnostic