Supplementary Material for: Chondromyxoid Fibroma of the Clavicle: A Case Report of a Rare Clinical Entity

<b><i>Introduction:</i></b> Chondromyxoid fibroma is a rare benign cartilaginous tumor that accounts for less than 1% of all bone tumors and involves long bones of the lower extremities more frequently. Therefore, the clavicle is a rare location of involvement for this entity. <b><i>Case Presentation:</i></b> The authors report a case of a diaphyseal chondromyxoid fibroma of the right clavicle in a 30-year-old male that was submitted to en bloc resection of the lesion and reconstruction with an autologous tricortical graft from the iliac crest. The post-operative period was uneventful, and the patient had regained excellent function of this right shoulder. At 2 years of follow-up, there was no evidence of a recurrence of the disease. <b><i>Conclusion:</i></b> Chondromyxoid fibroma of the clavicle should be included in the differential diagnosis of an indolent growing mass in this anatomic location.

<b><i>引言：</i></b> 软骨粘液样纤维瘤（chondromyxoid fibroma）是一种罕见的良性软骨性肿瘤，约占所有骨肿瘤的1%以下，更常累及下肢长骨，因此锁骨作为该病变的受累部位十分罕见。<b><i>病例报告：</i></b> 本文报告1例30岁男性患者的右锁骨骨干软骨粘液样纤维瘤病例，患者接受了病变整块切除，并采用自体髂骨三皮质骨移植进行重建。术后病程平稳，患者右肩关节功能恢复良好。随访2年未见肿瘤复发迹象。<b><i>结论：</i></b> 锁骨软骨粘液样纤维瘤应纳入该解剖部位惰性生长肿块的鉴别诊断范畴。