ABSTRACT Pilomatrixoma is a follicular benign tumor of unknown etiology that originates in the matrix of a hair follicle. It develops more frequently in children and young adults, with a slight predominance in female patients. It is a slow-growing tumor that presents as a mobile nodule, firm, and with well-defined borders. The present study aimed to report the clinical, histopathologic, and radiographic aspects of pilomatrixoma in the cheek area of a 20-year-old female patient as the established treatment at an oral maxillofacial department. Pilomatrixoma is rarely included in the differential diagnosis of masses and nodules in the skin, and it is often confused with other nodular lesions, such as epidermoid cysts. The diagnostic method to identify this entity is an incisional biopsy. Because of its high incidence in the head and neck region, oral surgeons should be well-acquainted with this type of tumor so that it can be included as a diagnostic hypothesis of masses and nodules of the head and neck.

Osteocondroma de côndilo mandibular é raro na região craniofacial. Este artigo descreve um caso de osteocondroma de côndilo mandibular em uma mulher de 20 anos que foi encaminhada ao nosso serviço apresentando assimetria facial, desvio de mento, mordida cruzada para o lado contralateral, alterações na morfologia condilar, limitação de abertura bucal e maloclusão. Tomografia computadorizada foi realizada para melhor avaliação da condição patológica da ATM. Devido à base no exame clínico, histórico do paciente e exames complementares, foi estabelecida uma hipótese de osteocondroma. Um procedimento de condilectomia utilizando abordagem preauricular com uma total remoção da lesão foi executado. Após três anos de acompanhamento pós-operatório e ortodôntico, o paciente está livre dos sintomas e tem uma abertura normal sem desvio de padrão durante a abertura.

Osteochondroma of the mandibular condyle has been found in the oral and maxillofacial region rarely. This paper describes a case of osteochondroma of the mandibular condyle in a 20-year-old woman, who was referred to our service with facial asymmetry, prognathic deviation of chin, cross-bite to the contralateral side, changes in condylar morphology, limited mouth opening, and malocclusion. Computed tomography (CT) was performed for better evaluation to the pathological conditions on the temporomandibular joint. Based on the clinical examination, patient history, and complementary exams, the hypothesis of osteochondroma was established. Condylectomy was performed using a preauricular approach with total removal of the lesion. After 3 years of postoperative follow up and orthodontic therapy, the patient is symptom-free, and has normal mouth opening with no deviation in the opening pattern.