Arthroscopic treatment of diffuse pigmented villonodular synovitis of the elbow.

INTRODUCTION: Pigmented villonodular synovitis (PVNS) is a rare pathology of the elbow, but presents a risk of progression with cartilage destruction. Surgical treatment consists in synovectomy, as complete as possible. Arthroscopy is an excellent tool for the exploration and treatment of intra-articular lesions in the elbow, but the results in PVNS of the elbow have never been evaluated. The aim of this study was to assess the recurrence rate of PVNS of the elbow after arthroscopic synovectomy, and secondarily to assess pain, joint range of motion, functional scores and complication rate. MATERIAL AND METHODS: We performed a retrospective study of a continuous series of 8 patients operated on between February 2012 and February 2019, with a mean age of 43.7 years. The operated side was the dominant side in 75% of cases. Surgery consisted in the most complete synovectomy possible, performed arthroscopically. Recurrence, clinical evaluation, with pain at rest and on mpvement on visual analogue scale (VAS) and joint range of motion, functional MEPS and DASH scores, and any complications were collected. RESULTS: At a mean 66.4 months' follow-up, 2 patients required revision surgery for recurrence. At the last follow-up, VAS for pain at rest was 0.9 and 1.9 for pain on movement. MEPS score was 85.6 and DASH score 82.2. No neurological, vascular or infectious complications of arthroscopic synovectomy were found in our series. DISCUSSION: Arthroscopic synovectomy in the treatment of PVNS of the elbow was a reliable and safe therapeutic alternative, with a low complications rate and 2 cases of recurrence (25%) in our study. This was the first study to report the results of arthroscopic surgical treatment of elbow PVNS. LEVEL OF EVIDENCE: IV Retrospective study without control group.