Extra-articular pigmented villonodular synovitis of the subacromial space
- 조철현; 손승원; 송광순; 강철형; 민병우; 배기철; 이성문
- Alternative Author(s)
- Cho, Chul Hyun; Sohn, Sung Won; Song, Kwang Soon; Kang, Chul Hyung; Min, Byung Woo; Bae, Ki Cheor; Lee, Sung Mun
- Publication Year
- Pigmented villonodular synovitis (PVNS) is a rare, benign, proliferating disease affecting
the synovium of joints, bursae, and tendon sheaths. The knee is the most common
site of involvement and accounts for up to 80% of cases. Involvement of the shoulder
is extremely rare.
Only 1 case of involvement of the subacromial space has been reported worldwide.
We report a case of localized extra-articular PVNS of the subacromial space that was
satisfactorily treated with open excisional biopsy and subacromial bursectomy after diagnostic
glenohumeral arthroscopy. We visualized the glenohumeral joint to rule out
articular invasion and intra-articular pathology with an arthroscope, which revealed a
highly vascular synovium protruding into the intra-articular area of the rotator interval,
with no direct invasion by the extra-articular mass. An open excisional biopsy and subacromial
burseclomy was perlbrmed. The disease has not recurred during an 18-month
follow-up period. The clinical manifestation, treatment, and prognosis of extra-articular
PVNS are poorly understood, but if the lesion is left untreated. It can invade the surrounding
soft tissue and joint. Therefore, early diagnosis and treatment are important for
the satisfactory management of PVNS.
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