Pattamawan ManosuthiJirapa PunyasinghRatthapong WorawongvasuNatthamet WongsirichatMahidol University2018-10-192018-10-192013-10-01Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology. Vol.25, No.4 (2013), 343-346221255582-s2.0-84887208672https://repository.li.mahidol.ac.th/handle/20.500.14594/31670The mass of pilomatricoma with abundant ossification at the preauricular region is unusual and generally present as a single mass. Most pilomatricomas are commonly presented as asymptomatic dermal or subcutaneous nodules or soft or rubbery masses. The hard nodule mass in this region is extreme rare and uncommon in the Oral Maxillofacial Surgery field. This case reports a 17-year-old Thai male, presenting slow growing hard (stony-like) mass at the left preauricular area without any disturbance to the parotid gland or facial nerve. Computed tomography was useful in determining the relationship to the neighboring structures and mass localization for diagnosis and treatment planning for the justified treatment. The histopathological diagnosis of this present case shows a remarkable ossification pilomatricoma. © 2012 Asian AOMS, ASOMP, JSOP, JSOMS, JSOM, and JAMI.Mahidol UniversityDentistryMedicineArticleSCOPUS10.1016/j.ajoms.2012.05.003