Abstract：
Bony outgrowths of the distal phalanx of the great toe have been described in the literature but rarely. These subungual bony outgrowths can be caused by subungual exostosis or subungual osteochondromas. Both of these abnormalities are bony outgrowths with differences in the cartilage cap wherein the exostoses have fibrocartilage, and osteochondromas have hyaline cartilage. The subungual exostosis and osteochondroma that are protruding present symptoms of pain, redness, and deformed nail bed, whereas the nonprotruding osteochondromas have only a lump as the presenting symptom. In both conditions, excision of the lesion and curettage of the base helps prevent a recurrence. Curettage at the end of the excision of the bony outgrowth is required to avoid recurrence. After excision, the specimen should be sent for histopathologic examination to differentiate between the exostosis and osteochondromas, which are underreported in subungual locations, and to rule out malignant transformation. We present a 13-year-old girl with an isolated subungual nonprotruding exostosis of the great toe that was treated by excisional biopsy. The histopathologic examination confirmed it as osteochondroma, which is underreported.
摘要：
文献中已经描述了大脚趾远端指骨的骨性生长，但很少。这些甲下骨生长可能是由甲下外生症或甲下骨软骨瘤引起的。这两种异常都是骨生长，软骨帽存在差异，其中外生骨具有纤维软骨，骨软骨瘤有透明软骨。突出的甲下骨外生症和骨软骨瘤存在疼痛症状，发红,和变形的甲床，而不突出的骨软骨瘤只有一个肿块作为表现症状。在这两种情况下，切除病灶并刮治基底有助于防止复发。在骨生长切除结束时需要刮除以避免复发。切除后,应将标本送去进行组织病理学检查，以区分外生骨和骨软骨瘤，在甲岛以下地区被低估了，并排除恶性转化。我们介绍了一个13岁的女孩，她的大脚趾下无突起外生体，并通过切除活检进行了治疗。组织病理学检查证实它是骨软骨瘤，这是少报的。
