Abstract
The authors report a case of localized nodular tenosynovitis originating from the medial plicae of the knee that was grossly observable, palpable, and symptomatic. A 41-year-old male visited our hospital with a complaint of knee pain that began 4 years ago. He complained of intermittent catching and a mass that appeared in the medial side of the knee 18 months ago. On magnetic resonance imaging, the mass was found on the plicae area of the medial side of the knee, and thus excisional biopsy was performed under arthroscopy. Histological study showed characteristics of localized nodular tenosynovitis originating from the synovium of the knee. At the 1-year postoperative outpatient follow-up, no symptoms or signs of recurrence were found. Since the authors experienced excellent postoperative results of arthroscopically assisted resection of a grossly observable and palpable localized nodular tenosynovitis originating from the synovium of the knee plicae, we report the case with a review of the literature.
Highlights
The authors report a case of localized nodular tenosynovitis originating from the medial plicae of the knee that was grossly observable, palpable, and symptomatic
Giant cell tumor of tendon sheath is a relatively common disease that originates from the synovium, which can be divided into localized nodular tenosynovitis and diffuse pigmented villonodular synovitis
Localized nodular tenosynovitis usually occurs in the synovium of the metacarpophalangeal joint of the hand1-3) and, though rare, once it occurs in the knee, it affects all portions of the synovium including the anterior and posterior cruciate ligaments4-7)
Summary
The authors report a case of localized nodular tenosynovitis originating from the medial plicae of the knee that was grossly observable, palpable, and symptomatic. Giant cell tumor of tendon sheath is a relatively common disease that originates from the synovium, which can be divided into localized nodular tenosynovitis and diffuse pigmented villonodular synovitis.
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