Li Suo-Yuan, Yu Xiao, Li Zhi-Qiang, Yang Guang, Lv Jing-Huan, Chen Guang-Xiang, Xu Ren-Jie
Department of Orthopaedics, Soochow University, Suzhou 215007, Jiangsu Province, China.
Department of Orthopaedics, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou 215000, Jiangsu Province, China.
World J Clin Cases. 2022 Jun 6;10(16):5373-5379. doi: 10.12998/wjcc.v10.i16.5373.
The accessory bones are common bone variations around the feet and ankles, which usually originate from nonunion of the secondary ossification center adjacent to the main bone mass, and most of them remain asymptomatic. Os subcalcis is an accessory bone at the plantar aspect of the calcaneus, which is located just posterior to the insertion of the plantar fascia. Focal bone formation at the calcaneal plantar pole with heel pain has rarely been reported.
A 55-year-old man presented to our clinic with left plantar heel pain and a progressive swelling for 8 years. X-ray, computer tomography and magnetic resonance imaging showed a large os subcalcison the plantar side of the calcaneus, located at the insertion of the plantar fascia. He underwent surgical excision of the lesion. Microscopically the bony trabeculae were intermingled with fat and covered with cartilage.
This is a rare case with accessory os subcalcis leading to heel pain. It highlights the awareness of os subcalcis and helps avoid future misdiagnosis of heel pain.
副骨是足踝周围常见的骨骼变异，通常源于与主要骨块相邻的次级骨化中心未愈合，且大多数副骨无症状。跟骨下骨是位于跟骨跖侧的一块副骨，恰好在跖腱膜附着点的后方。关于跟骨跖侧极处出现局灶性骨形成并伴有足跟痛的情况鲜有报道。
一名55岁男性因左足底足跟痛及进行性肿胀8年就诊于我院。X线、计算机断层扫描和磁共振成像显示跟骨跖侧有一块大的跟骨下骨，位于跖腱膜附着处。他接受了病变的手术切除。显微镜下可见骨小梁与脂肪交织，并覆盖有软骨。
这是一例罕见的因跟骨下副骨导致足跟痛的病例。它提高了对跟骨下骨的认识，并有助于避免未来对足跟痛的误诊。
