Alghamdi Bader, Koaban Saeed, Alnaqa Hossam
Orthopaedics, Prince Mohammad Bin Abdulaziz Hospital, Riyadh, SAU.
Orthopaedic Surgery, Security Forces Hospital, Riyadh, SAU.
Cureus. 2021 Jul 26;13(7):e16632. doi: 10.7759/cureus.16632. eCollection 2021 Jul.
A giant cell tumor of the tendon sheath (GCTTS) is a benign, soft tissue (synovial membrane) tumor that frequently involves the fingers. However, the localized form of the GCTTS can be rarely seen in large joints such as knees, ankles, and shoulders. GCTTS may occur due to questionable etiology that includes inflammation, trauma, or chromosomal abnormalities. This is a case of a 30-year-old female, who presented with a painful mass in her right knee. Examination revealed a palpable, tender, slightly mobile mass lateral to the patella. MRI demonstrated a cystic lesion that underwent excision. Data from the reported cases imply that local recurrence was observed in 10%-20% of patients due to incomplete primary resection. Physicians should consider the likelihood of a GCTTS when an intra-articular knee prominence is found. Early diagnosis and appropriate treatment can help with rapid clinical improvement.
腱鞘巨细胞瘤（GCTTS）是一种良性软组织（滑膜）肿瘤，常累及手指。然而，GCTTS的局限性形式在膝关节、踝关节和肩关节等大关节中很少见。GCTTS的病因尚不清楚，可能包括炎症、创伤或染色体异常。这是一例30岁女性患者，她右膝出现疼痛性肿块。检查发现髌骨外侧有一个可触及、压痛、稍有活动度的肿块。MRI显示一个囊性病变，该病变已被切除。报告病例的数据表明，由于初次切除不完全，10%-20%的患者出现局部复发。当发现膝关节内有突出物时，医生应考虑GCTTS的可能性。早期诊断和适当治疗有助于临床快速改善。
