Brown tumor related to hyperparathyroidism rarely affects facial bones. The oral radiographic manifestations of brown tu- mor of hyperparathyroidism (BTH) include root resorption and loss of lamina dura. Woman, 39, had swelling of the mandible extending from tooth #43 to #45, leathery consistency, and mobility of the involved teeth. A well-defined radiolucent area, the presence of the lamina dura, and root resorption were found. An incisional biopsy revealed giant cell lesion. It was decided not to explore the mandibular lesion surgically. Blood biochemistry analysis revealed increased parathormone level. The patient was referred for a surgical procedure to remove the parathyroid ade- noma. Follow-up at 24 months showed hormonal regulation and regression of the BTH. The treatment in this case was conser- vative and the lamina dura was not lost. Clinicians should be aware that this unusual finding indicates a rare manifestation of BTH. Acknowledgment: FAPEMIG. PE-060 - CALCIFYING CYSTIC ODONTOGENIC TU- MOR: CASE REPORT. JOSÉ ANDERSON DE BARROS MATOS, ROBERTA NATALIE DE ANDRADE SANTOS, GILLIENE BATISTA FERREIRA DA COSTA, ANDREZA VERUSKA LIRA CORREIA, ELAINE JUDITE DE AMORIM CARVALHO, DANYEL ELIAS DA CRUZ PEREZ, JUREMA FREIRE LISBOA DE CASTRO. UNIVERSIDADE FED- ERAL DE PERNAMBUCO. Calcifying cystic odontogenic tumor (CCOT) is most often seen in patients during their third and fourth decades of life. The lesion may occur in both jaws but mainly affects the anterior segments. Unerupted tooth tissue is frequently involved by the tumor. Man, 36, was referred for evaluation of a swelling in the right maxilla. Panoramic radiography revealed a well-circum- scribed radiolucent image associated with the unerupted right maxillary canine. Root resorption of the first premolar was also observed. Computed tomography showed significant enlargement of the buccal cortical bone, which appeared thinner. Microscop- ically, a cystic cavity lined by enlarged epithelial cells with eosinophilic cytoplasm (ghost cells) was observed. In addition, basal cells showed reverse nucleus polarity. These findings sup- ported a diagnosis of CCOT. CCOT is a well-defined expansive neoplasm usually associated with unerupted tooth. Root resorp- tion may also be observed. PE-061 - CALCIFYING CYSTIC ODONTOGENIC TU- MOR: BIOPSY ASSISTED BY FIBROSCOPY. FERNANDO KENDI HORIKAWA, JULIANA SEO, DARCIO KITAKAWA, CARLOS HENRIQUE HUEB, MARCELO MARTINSON RUIZ, DECIO DOS SANTOS PINTO JUNIOR, ELIO HITOSHI SHINOHARA. FACULDADE DE ODONTOLO- GIA DA UNIVERSIDADE DE SÃO PAULO/BMF H. MUNICIPAL DE ERMELINO MATARAZO SMS-SP. Calcifying cystic odontogenic tumor (CCOT) constitutes a rare benign cystic neoplasm arising from epithelial odontogenic rests in the jaw. Boy, 14, complained of swelling expanding from the left maxilla in 3 months. Panoramic radiograph showed a unilocular radiolucent lesion with ill-defined margins and areas of radiopacity involving teeth # 21 to #27, with teeth #22 and #23 impacted. Arthroscopy-video-assisted biopsy revealed a unique cavity with whitish spots on the capsule surface. The presumptive diagnosis of CCOT was confirmed by incisional and arthroscopy-video-assisted biopsy. Histopathological examination showed a cystic capsule lined by epithelium in focal areas, tall columnar cells, and odontogenic ghost cell proliferation. Basophilic calcifications and hyaline material with some ghost cells were observed. Arthroscopy is increasing used as a diagnostic procedure with good results in the role of identifying an appropriate area of tissue to focus on for diagnosis. PE-062 - CALCIFYING EPITHELIAL ODONTOGENIC TUMOR (CEOT): CASE REPORT. THÂMARA MANOELA MARINHO BEZERRA, MÁRCIA CRISTINA DA COSTA MIGUEL, BÁRBARA VANESSA DE BRITO MONTEIRO, JOSÉ WILSON NOLETO, MARCOS ANTÔNIO FARIAS DE PAIVA, JULIERME FERREIRA ROCHA, CYNTIA HELENA PEREIRA DE CARVALHO. UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE. Calcifying epithelial odontogenic tumor (CEOT) (Pindborg’s tumor) is a benign odontogenic neoplasm that comprises about 1% of all odontogenic tumors and presents locally aggressive biological behavior. CEOT affects patients in a broad age range and it is usually found on the posterior mandible. Caucasian man, 19, presented swelling in the region of the right maxilla present for 6 months. Imaging showed the presence of an extensive radiolucent lesion associated with the second and third unerupted molars. Needle aspiration was performed, and a white liquid was obtained. An incisional biopsy was done. Histopathological analysis found polyhedral epithelial cells with distinct contours, hyperchromatic nucleus, amyloid-like material, and basophilic calcified material, establishing the diagnosis of CEOT. Marsupi- alization was performed. No significant changes have been seen during close follow-up. The overall prognosis is good. PE-063 - LARGE CALCIFYING EPITHELIAL ODONTO- GENIC TUMOR: CASE REPORT. MANOELA CARRERA, MARIANA SANTOS OLIVEIRA, MARIANE MENEZES NASCIMENTO, JAQUELINE MOREIRA, FELIPE PAIVA, OSLEI PAES DE ALMEIDA, DAVID COSTA MOREIRA. UNIVERSIDADE ESTADUAL DO SUDOESTE DA BAHIAeUESB. Calcifying epithelial odontogenic tumor accounts for 1% of all the odontogenic tumors. This rare benign neoplasm has locally aggressive behavior. Man, 22, had right mandibular swelling. Radiographs revealed a radiolucent image with foci of calcifica- tion associated with an impacted inferior second molar. This lesion extended from the first molar region to the mandibular coronoid process. After an incisional biopsy, histopathologic analysis indicated islands of odontogenic epithelial cells with regular nuclei and eosinophylic cytoplasm dispersed in a highly collagen stroma. Homogeneous hyaline material was present, sometimes in intimate contact with the neoplastic cells; it was positive for Congo red stain. Immunohistochemical results were positive for CK19. Bone curettage was the treatment choice because of the tumor’s growth. After 1 year the patient demon- strates good bone repair without signs of recurrence. PE-064 - CALCIFYING EPITHELIAL ODONTOGENIC TUMOR: CLINICAL MANAGEMENT OF AN INFECTED TUMOR FROM DIAGNOSIS TO REHABILITATION WITH BONE GRAFT AND DENTAL IMPLANTS. LARA CRISTINA OLIVER GIMENEZ, NELISE ALEXANDRE SILVA LASCANE, FERNANDO SIMÕES MORANDO, ANDRÉ CAROLI ROCHA, FABIANA MARTINS MARTINS, ANDREA MANTESSO POBOCIK, DÉCIO DOS SANTOS PINTO JÚNIOR. DENTAL SCHOOL, UNIVERSITY OF SAO PAULO. ORAL AND MAXILLOFACIAL PATHOLOGY OOOO e144 Abstracts February 2014