Localised Nodular Synovitis: an Uncommon Cause of Knee Pain
KK Cheng, CH Chan, SL Yip, SK Chan, HL Chow
Hong Kong J Radiol 2013;16:296-300
DOI: 10.12809/hkjr1312128
Localised nodular synovitis is a benign localised synovial proliferative tumour that occurs in the tendon sheath. This tumour rarely involves the large joints such as the knee. This report is of a patient with localised nodular synovitis at the infrapatellar region of the knee, who presented with chronic knee pain. Magnetic resonance imaging was performed and the diagnosis was confirmed histologically after excision of the tumour. There are many differential diagnoses for solitary lesion of the knee, and the clinical manifestations can be non-specific. Systematic imaging is an important part of making the diagnosis. Synovial lesion of the knee is an infrequent condition, and localised nodular synovitis is one of the rarer differential diagnoses, but it should be considered in cases of knee pain and solitary nodule in the knee.
中文摘要
局限性結節性滑膜炎：膝關節疼痛的罕見病因
鄭加勁、陳志軒、葉紹亮、陳紹騏、仇鴻烈
局限性結節性滑膜炎發生於腱鞘，屬於一種局部滑膜增生的良性腫瘤。這種腫瘤很少累及如膝關節的大關節。本文報告一名臨床表現為膝關節慢性疼痛的髕下區局限性結節性滑膜炎病例。病人接受了磁共振掃描，腫瘤切除後得到病理學證實。膝關節孤立性病變可有多種不同的鑑別診斷，而且臨床表現並無特異性。系統性成像成為診斷的重要部份。膝關節滑膜病變不常見，局限性結節性滑膜炎是其中一種更罕見的鑑別診斷；但當出現膝關節疼痛合併孤立性病變時，須考慮該病的可能性。