Pilomatricoma是一种罕见的良性皮肤附件肿瘤,由毛发基质细胞引起。它通常表现为从公司到公司,界限分明,常被误认为皮样囊肿的无触痛结节。然而,据报道,其临床表现模拟瘢痕疙瘩。此外,虽然它最常见于头部和颈部,很少在耳廓上报道毛囊瘤。在这里,我们报告了一例发生在一名9岁女孩耳廓后部的毛囊瘤。与经典的毛囊瘤不同,肿瘤很像瘢痕疙瘩.然而,切除肿瘤后的组织学检查显示,真皮肿瘤排列在由基底细胞和鬼细胞组成的实巢中,并伴有异物反应。钙化,和骨化,确认pilomatricoma的诊断。稀有,不典型的临床表现,该肿瘤的独特位置导致了该病例的误诊。因此,我们回顾了文献中报道的耳廓毛囊瘤的先前病例,以提供对这种罕见实体的全面了解。
Pilomatricoma is a rare benign skin adnexal tumor arising from hair matrix cells. It usually manifests as a firm-to-hard, well-circumscribed, nontender nodule often mistaken as a dermoid cyst. However, its clinical presentation has been reported to mimic keloid. In addition, although it occurs most frequently in the head and neck area, pilomatricoma is rarely reported on the auricle. Herein, we reported a case of pilomatricoma occurring on the posterior part of a 9-year-old girl\'s auricle. Unlike classic pilomatricoma, the tumor closely resembled a keloid. Nevertheless, histological examination following excision of the tumor revealed a dermal tumor arranged in solid nests consisting of basaloid and ghost cells along with foreign body reaction, calcification, and ossification, confirming the diagnosis of pilomatricoma. The rarity, atypical clinical presentation, and unique location of this tumor contributed to the misdiagnosis of this case. Therefore, we reviewed previous cases of pilomatricoma of the auricle reported in the literature to provide a comprehensive understanding of this rare entity.