Osteoma is the most frequent benign tumor in the craniomaxillofacial region. The most common initial manifestation is facial pressure or headache. The clinical examination showed increased volume in the right supraorbital region, asymmetry of the orbital contour, exophthalmia, dystopia, proptosis and clinical restraint of ocular movement for supraversion. The lesion measured approximately 4 cm in diameter with irregular contour. Osteotomy was performed with saw surrounding the tumor, with aid of a surgical piezo on the orbital medial wall. The result of histopathological examination was osteoma. The patient is 2.5 years postoperatively and so far without complications.

Dentigerous cysts are the second most common odontogenic cysts of the jaws, and sometimes inhibit the eruption of teeth. Almost all of the dentigerous cyst encloses the crown of an unerupted tooth and the radiolucent area is attached to the tooth at the cementoenamel junction. Dentigerous cyst is more common in male patients and most commonly develop in the second and third decades of life. Clinically, a localized swelling of the alveolar bone can be detected, however, dentigerous cysts can be asymptomatic during a long period of time, leading to a significant destruction of bone. The conventional treatment plan is cyst removal and marsupialization. Marsupialization therapy can be useful to promote the spontaneous eruption of the involved tooth within the cyst. However, tooth eruption does not always occur spontaneously after marsupialization. This article aims to report a clinical case of the diagnosis and treatment of a dentigerous cyst in the maxilla associated with an unerupted canine in a pediatric patient and discussion of the treatment performed.

The aim of this study was to compare the proliferative pattern of dentinogenic ghost cell tumors (DGCT) and unicystic calcifying cystic odontogenic tumors (UCCOT) using antibodies against PCNA, p53 and Ki-67. Three cases diagnosed as DGCT and ten as UCCOT were retrieved from the fi les of the Surgical Oral Pathology Service at the University of São Paulo, Brazil. Immunohistochemistry was performed in formalin-fi xed and paraffi n-embedded tissue specimens. Only nuclear staining was considered specifi c for the three antibodies. Immunoexpression of PCNA, Ki-67 and p53 was analyzed semi-quantitatively and quantitatively. The results showed that PCNA was positive in both lesions, mainly in the basal cells, and p53 showed positivity in all cases. UCCOT showed statistically signifi cantly higher Ki-67 labeling indices than did DGCT. In conclusion, our results do not support the correlation between proliferative activity as shown by these proteins and reported biologic behavior. Odontogenic Cyst, Calcifying; Cell Proliferation; Immunohistochemistry. Expressão de PCNA, p53 e Ki-67 em tumor dentinogênico de células fantasmas e tumor odontogênico cístico calcifi cante unicístico • O objetivo deste estudo foi avaliar a expressão dos antígenos PCNA, p53 e Ki-67 (marcadores de proliferação), em três casos diagnosticados como tumor dentinogênico de células fantasma (TDCF) e dez casos como tumor odontogênico císticos, calcifi cante unicístico (TOCCU) obtidos dos arquivos do Serviço de Patologia Oral e Cirúrgica da Universidade de São Paulo, Brasil. Foram realizadas reações de imunohistoquímica em espécimes de tecido parafi nado. Apenas a marcação nuclear foi considerada específi ca para os três anticorpos. A imunoexpressão das proteínas PCNA, p53 e Ki-67 foi analisada semi-quantitativamente e quantitativamente. Os resultados mostraram que o PCNA foi expresso em ambas as lesões, principalmente na camada basal, e que p53 também mostrou positividade em todos os casos. O TOCCU mostrou um aumento estatisticamente signifi cante na expressão do Ki-67 em relação ao TDCF. Em conclusão, nossos resultados não mostraram correlação entre a atividade proliferativa e o comportamento biológico desses tumores.

Mucormycosis is an opportunistic, and frequently lethal, fungal infection that occurs in patients with immunocompromised states, such as diabetes mellitus. This infection invades not only the paranasal sinuses, but also the maxillae, zygoma, and rhinocerebral structures, which results in massive destruction of the facial skeleton and soft tissue. It progresses in patients with underlying comorbidities, such as diabetes mellitus, haematologic malignancy, cerebral malignancy, renal failure, and systemic immunosuppression. Most cases occur in tropical countries. The relationship between mucormycosis and these underlying conditions has been widely discussed in the literature. This study sought to report the case of a patient diagnosed with glioblastoma and mucormycosis in the maxilla, who was successfully treated with surgery and isavuconazonium sulfate (Cresemba).