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

Made available in DSpace on 2019-10-06T16:52:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-12-01 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. Oral Pathology and Oral Medicine Amazonas State University Maxilofacial Surgery Amazonas State University Maxilofacial Surgery Amazonas State University Maxilofacial Surgery Residency Endodontics School of Dentistry São Paulo State University (Unesp) Periodontics School of Dentistry University Center São Lucas Endodontics School of Dentistry São Paulo State University (Unesp)