A new case of the pilomatrixoma rare in the preauricular region and review of series of cases

• Autor(a) principal: Pinheiro, Tiago Novaes
• Data de Publicação: 2018
• Outros Autores: Fayad, Flavio Têndolo, Arantes, Pedro, Benetti, Francine [UNESP], Guimarães, Gustav, Cintra, Luciano Tavares Angelo [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1007/s10006-018-0724-8; http://hdl.handle.net/11449/189786
• topic: Calcifying epithelioma of Malherbe; Head and neck; Pilomatricoma; Pilomatrixoma; Skin

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.