Pinheiro Tiago Novaes, Fayad Flavio Têndolo, Arantes Pedro, Benetti Francine, Guimarães Gustav, Cintra Luciano Tavares Angelo
Oral Pathology and Oral Medicine, Amazonas State University, Manaus, AM, 69050-010, Brazil.
Maxilofacial Surgery, Amazonas State University, Manaus, AM, 69050-010, Brazil.
Oral Maxillofac Surg. 2018 Dec;22(4):483-488. doi: 10.1007/s10006-018-0724-8. Epub 2018 Oct 3.
Pilomatrixoma is considered a rare benign tumor arising from the hair follicle, most common in the head and neck region, but it is rarely diagnosed on a clinical basis. This report describes a new case of giant pilomatrixoma in a 36-year-old female patient. The nodule was localized in the preauricular area on the right side, appearing as a slow-growing, fixed, painless, with a hardened consistency, unusual giant (4.5 cm). A cone-beam computed tomography (CBCT) examination showed a slightly hyperdense lesion, and fine-needle aspiration cytology (FNAC) revealed peripheral blood and mononucleated inflammatory cells. After enucleation of lesion, a diagnosis of pilomatrixoma was confirmed. The differential diagnosis of pilomatrixoma is broad, because its characteristics also can be found in other lesions common to the head and neck. Thus, a lesion in the head and neck, adherent to the skin, and well demarcated, mainly in the young and in females, should be suspected as pilomatrixoma.
毛母质瘤被认为是一种罕见的起源于毛囊的良性肿瘤，最常见于头颈部区域，但临床上很少能确诊。本报告描述了一名36岁女性患者的巨大毛母质瘤新病例。结节位于右侧耳前区，表现为生长缓慢、固定、无痛、质地硬，为罕见的巨大型（4.5厘米）。锥形束计算机断层扫描（CBCT）检查显示病变稍高密度，细针穿刺细胞学检查（FNAC）显示有外周血和单核炎性细胞。病变摘除后，确诊为毛母质瘤。毛母质瘤的鉴别诊断范围广泛，因为其特征也可见于头颈部其他常见病变。因此，对于头颈部附着于皮肤、边界清晰、主要发生于年轻人和女性的病变，应怀疑为毛母质瘤。
