Khalifa Mohamed Ali, Jedidi Mehdi, Hassini Lassaad, Bouattour Karim, Osman Walid, Ayeche Mohamed Laziz Ben
Department of Orthopaedic Surgery, University Hospital, Sahloul, Sousse, Tunisia.
J Orthop Case Rep. 2018 Sep-Oct;8(5):47-49. doi: 10.13107/jocr.2250-0685.1206.
Villonodular synovitis (SVN) is a rare benign pseudotumoral proliferation of the synovial joint, of unknown etiology. In general, it reaches the big joints, especially the knee. Localization at the subtalar level is extremely rare, with only a few cases published in the literature.
We report the case of an SVN of the subtalar in a 60-year-old patient without particular histories, who consulted for a swelling of the external border of the right foot evolving for 2 years. Biology, as well as the standard radiographs, was without anomalies. The diagnosis was evoked on magnetic resonance imaging (MRI) and confirmed by surgical biopsy and excision. The operative follow-up was simple with no recurrence after 3 years.
SVN of the subtalar is rare. Surgical treatment is based mainly on synovectomy, and the prognosis depends mainly on the osteocartilaginous lesion and the quality of excision.
色素沉着绒毛结节性滑膜炎（SVN）是一种病因不明的滑膜关节罕见良性假瘤样增生。一般来说，它好发于大关节，尤其是膝关节。距下关节水平的病变极为罕见，文献中仅报道过少数病例。
我们报告一例60岁无特殊病史患者的距下关节色素沉着绒毛结节性滑膜炎病例，该患者因右脚外侧缘肿胀2年前来就诊。血液检查及标准X线片均无异常。磁共振成像（MRI）提示了诊断，并经手术活检及切除得以证实。手术随访过程顺利，3年后无复发。
距下关节色素沉着绒毛结节性滑膜炎较为罕见。手术治疗主要基于滑膜切除术，预后主要取决于骨软骨病变及切除质量。
