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INTRAOSSEOUS CARCINOMA MUCOEPIDERMOID: A CASE REPORT
OOOO Volume 124, Number 2
ABSTRACTS Abstracts e81
lesion because of the presence scaly odontogenic epithelial cells. Cystic decompression with placement of a silicone drain was performed and all tissue removed in the procedure was submitted for histopathologic diagnosis. Histopathologic examination diagnosed the presence of a keratocystic odontogenic tumor. The case still under follow-up for the last 8 months with significant regression of the lesion.
CPP136 - EXTENSIVE PERIPHERAL OSSIFYING FIBROMA IN PALATE: A CASE REPORT. ERIKA PATRÍCIA MOURA GARCEZ, SANDRA APARECIDA MARINHO, DMITRY JOSÉ DE SANTANA SARMENTO, GUSTAVO GOMES AGRIPINO, JOSÉ CADMO WANDERLEY ARAÚJO FILHO, POLLIANNA MUNIZ ALVES, SÉRGIO HENRIQUE GONÇALVES DE CARVALHO.
Peripheral ossifying fibroma is a gingival nodule, which is composed of a cellular fibroblastic connective tissue stroma that is associated with the formation of randomly dispersed foci of mineralized products. The reported case occurred in a white female patient, 35 years old, that was referred to Stomatology department, seeking care for a palatal lesion. In an intraoral exam, was observed a tumor lesion with firm consistence, reddish color and ulcerated surface that extended over hard palate and oropharynx. The lesion compromised the occlusion of patient. Panoramic radiograph showed dental displacement and bone involvement in left maxillary near the maxillary sinus. Incisional biopsy was performed and the histopathologic aspects were conclusive for peripheral ossifying fibroma. The treatment was realized with surgical resection. No recurrence was observed. Lesions that present with rapid growth must be properly diagnosed to discard the possibility of malignant lesions that presents similar growth potential.
CPP137 - INTRAOSSEOUS CARCINOMA MUCOEPIDERMOID: A CASE REPORT. EVERTON FREITAS DE MORAIS, LEORIK PEREIRA DA SILVA, ANTÔNIO BRUNO GOMES MORORÓ, EDILSON PEREIRA PINTO, ADALBERTO MOSQUEDA TAYLOR, LEÃO PEREIRA PINTO, LÉLIA BATISTA DE SOUZA. Intraosseous mucoepidermoid carcinoma (IMC) is a rare malignant salivary gland tumor of unknown pathogenesis, comprising about 4% of all mucoepidermoid carcinomas. Herein we report a 22-year-old female patient, referred to oral diagnosis center after 4 years extraction of tooth 28 and enucleation of cystic lesion associated, with hypothesis of dentigerous cyst. Clinical examination showed swelling in the posterior maxilla. CT showed a hypodense lesion in region 28 with expansion of cortical bone of the maxillary sinus, without disruption. Odontogenic tumor was the diagnostic hypothesis. After incisional biopsy, histopathologic study, immunohistochemistry (SMA; CK-7; AE1/AE3) and histochemical (Alcian-blue; PAS; Mucicarmin) confirmed the diagnosis of IMC. The patient was treated with surgical resection in head and neck surgery service. Followup of18 months without recurrence. Although rare, IMC may be considered a differential diagnosis in cases of proliferative and osteolytic lesions, even when its clinical or radiographic findings do not suggest malignancy.
CPP138 - IMAGING FINDINGS OF SILENT SINUS SYNDROME. GIOVANI ANTONIO RODRIGUES, BIANCA
CARRILHO
MORANDO, EDWIN TAMASHIRO, ANA CAROLINA FRAGOSO MOTTA, CHRISTIANO DE OLIVEIRA SANTOS. Silent sinus syndrome (SSS) is characterized by progressive atelectasis of the maxillary sinus with centripetal collapse of sinus walls and consequent enophthalmos and diplopia. Herein we report 2 cases of female patients who showed lack of definition of the medial cortical of the right maxillary sinus and the lateral wall of the nasal fossa as a radiographic finding on their panoramic exam. Skull posterior and anterior radiography showed opacification of the right maxillary sinus. Diagnostic hypotheses were chronic rhinosinusitis and neoplasm in the maxillary sinus. Cone beam CT revealed opacification of the right maxillary sinus, obstruction of the ostiomeatal complex and discreet inferior bowing of the orbit floor. The final diagnosis was SSS, and patients were referred to otorhinolaryngologist consult for evaluation and treatment. These cases highlight the contribution of maxillofacial imaging in the diagnosis of SSS, to contribute to early treatment and potentially avoid ocular changes.
CPP139 - INCIPIENT SQUAMOUS CELL CARCINOMA OF THE TONGUE. PAULO DE CAMARGO MORAES, FRANCINE KÜHL PANZARELLA, MARCELO SPERANDIO, FABRÍCIO PASSADOR, ANDRESA BORGES SOARES, VERA CAVALCANTI ARAÚJO, NEY SOARES DE ARAÚJO. A white male patient, 35 years old, non-smoker and nonalcoholic sought the dentist because of pain on the right lateral border of the tongue. Clinical examination showed a well-defined white lesion compatible with leukoplakia and lichen planus. Incisional biopsy was performed and revealed moderate to severe epithelial dysplasia. Excision of the lesion was performed 4 months later, which was diagnosed histopathologically as epithelial hyperplasia without dysplasia. Eight years later, the patient was seen again because of a 6 months history of pain at the same aforementioned site. Though rather innocuous in appearance, the lesion with 2 cm presented similar clinical features as before, so a new incisional biopsy was done at same university, revealing a microinvasive squamous cell carcinoma. Immunohistochemistry was negative to p16, thus excluding HPV infection as etiology. Markers were used to evaluate a possible involvement of vessels and nerves. Partial glossectomy was performed and no residual neoplasia was present in the resection specimen. Surgery did not compromise speech or swallowing and a regular clinical follow-up has been done.
CPP140 - LARGE SCHWANNOMA OF THE HARD PALATE: REPORT OF AN UNCOMMON CASE AND 40-YEAR LITERATURE REVIEW. JULIANA CAMPOS PINHEIRO, ALLAN ULISSES CARVALHO DE MELO, JULIANA BATISTA MELO DA FONTE, MARIA DE FÁTIMA BATISTA DE MELO, ERICKA JANINE DANTAS DA SILVEIRA, LÉLIA BATISTA DE SOUZA, RICARDO LUIZ CAVALCANTI DE ALBUQUERQUE -JÚNIOR. Schwannomas are benign tumors derived from Schwann cells that seldom occur in the oral cavity. Tongue is the most common site of intraoral schwannomas and palatal tumors are extremely rare. Herein we report a case of an 18-year-old male patient with a 3 years evolution painless swelling on the right side of the hard palate, measuring 3.5 cm. Cone beam CT scan showed slight resorption of the right posterior palatal cortical bone. Histologic examination showed an encapsulated tumor composed of
ABSTRACTS Abstracts e81
lesion because of the presence scaly odontogenic epithelial cells. Cystic decompression with placement of a silicone drain was performed and all tissue removed in the procedure was submitted for histopathologic diagnosis. Histopathologic examination diagnosed the presence of a keratocystic odontogenic tumor. The case still under follow-up for the last 8 months with significant regression of the lesion.
CPP136 - EXTENSIVE PERIPHERAL OSSIFYING FIBROMA IN PALATE: A CASE REPORT. ERIKA PATRÍCIA MOURA GARCEZ, SANDRA APARECIDA MARINHO, DMITRY JOSÉ DE SANTANA SARMENTO, GUSTAVO GOMES AGRIPINO, JOSÉ CADMO WANDERLEY ARAÚJO FILHO, POLLIANNA MUNIZ ALVES, SÉRGIO HENRIQUE GONÇALVES DE CARVALHO.
Peripheral ossifying fibroma is a gingival nodule, which is composed of a cellular fibroblastic connective tissue stroma that is associated with the formation of randomly dispersed foci of mineralized products. The reported case occurred in a white female patient, 35 years old, that was referred to Stomatology department, seeking care for a palatal lesion. In an intraoral exam, was observed a tumor lesion with firm consistence, reddish color and ulcerated surface that extended over hard palate and oropharynx. The lesion compromised the occlusion of patient. Panoramic radiograph showed dental displacement and bone involvement in left maxillary near the maxillary sinus. Incisional biopsy was performed and the histopathologic aspects were conclusive for peripheral ossifying fibroma. The treatment was realized with surgical resection. No recurrence was observed. Lesions that present with rapid growth must be properly diagnosed to discard the possibility of malignant lesions that presents similar growth potential.
CPP137 - INTRAOSSEOUS CARCINOMA MUCOEPIDERMOID: A CASE REPORT. EVERTON FREITAS DE MORAIS, LEORIK PEREIRA DA SILVA, ANTÔNIO BRUNO GOMES MORORÓ, EDILSON PEREIRA PINTO, ADALBERTO MOSQUEDA TAYLOR, LEÃO PEREIRA PINTO, LÉLIA BATISTA DE SOUZA. Intraosseous mucoepidermoid carcinoma (IMC) is a rare malignant salivary gland tumor of unknown pathogenesis, comprising about 4% of all mucoepidermoid carcinomas. Herein we report a 22-year-old female patient, referred to oral diagnosis center after 4 years extraction of tooth 28 and enucleation of cystic lesion associated, with hypothesis of dentigerous cyst. Clinical examination showed swelling in the posterior maxilla. CT showed a hypodense lesion in region 28 with expansion of cortical bone of the maxillary sinus, without disruption. Odontogenic tumor was the diagnostic hypothesis. After incisional biopsy, histopathologic study, immunohistochemistry (SMA; CK-7; AE1/AE3) and histochemical (Alcian-blue; PAS; Mucicarmin) confirmed the diagnosis of IMC. The patient was treated with surgical resection in head and neck surgery service. Followup of18 months without recurrence. Although rare, IMC may be considered a differential diagnosis in cases of proliferative and osteolytic lesions, even when its clinical or radiographic findings do not suggest malignancy.
CPP138 - IMAGING FINDINGS OF SILENT SINUS SYNDROME. GIOVANI ANTONIO RODRIGUES, BIANCA
CARRILHO
MORANDO, EDWIN TAMASHIRO, ANA CAROLINA FRAGOSO MOTTA, CHRISTIANO DE OLIVEIRA SANTOS. Silent sinus syndrome (SSS) is characterized by progressive atelectasis of the maxillary sinus with centripetal collapse of sinus walls and consequent enophthalmos and diplopia. Herein we report 2 cases of female patients who showed lack of definition of the medial cortical of the right maxillary sinus and the lateral wall of the nasal fossa as a radiographic finding on their panoramic exam. Skull posterior and anterior radiography showed opacification of the right maxillary sinus. Diagnostic hypotheses were chronic rhinosinusitis and neoplasm in the maxillary sinus. Cone beam CT revealed opacification of the right maxillary sinus, obstruction of the ostiomeatal complex and discreet inferior bowing of the orbit floor. The final diagnosis was SSS, and patients were referred to otorhinolaryngologist consult for evaluation and treatment. These cases highlight the contribution of maxillofacial imaging in the diagnosis of SSS, to contribute to early treatment and potentially avoid ocular changes.
CPP139 - INCIPIENT SQUAMOUS CELL CARCINOMA OF THE TONGUE. PAULO DE CAMARGO MORAES, FRANCINE KÜHL PANZARELLA, MARCELO SPERANDIO, FABRÍCIO PASSADOR, ANDRESA BORGES SOARES, VERA CAVALCANTI ARAÚJO, NEY SOARES DE ARAÚJO. A white male patient, 35 years old, non-smoker and nonalcoholic sought the dentist because of pain on the right lateral border of the tongue. Clinical examination showed a well-defined white lesion compatible with leukoplakia and lichen planus. Incisional biopsy was performed and revealed moderate to severe epithelial dysplasia. Excision of the lesion was performed 4 months later, which was diagnosed histopathologically as epithelial hyperplasia without dysplasia. Eight years later, the patient was seen again because of a 6 months history of pain at the same aforementioned site. Though rather innocuous in appearance, the lesion with 2 cm presented similar clinical features as before, so a new incisional biopsy was done at same university, revealing a microinvasive squamous cell carcinoma. Immunohistochemistry was negative to p16, thus excluding HPV infection as etiology. Markers were used to evaluate a possible involvement of vessels and nerves. Partial glossectomy was performed and no residual neoplasia was present in the resection specimen. Surgery did not compromise speech or swallowing and a regular clinical follow-up has been done.
CPP140 - LARGE SCHWANNOMA OF THE HARD PALATE: REPORT OF AN UNCOMMON CASE AND 40-YEAR LITERATURE REVIEW. JULIANA CAMPOS PINHEIRO, ALLAN ULISSES CARVALHO DE MELO, JULIANA BATISTA MELO DA FONTE, MARIA DE FÁTIMA BATISTA DE MELO, ERICKA JANINE DANTAS DA SILVEIRA, LÉLIA BATISTA DE SOUZA, RICARDO LUIZ CAVALCANTI DE ALBUQUERQUE -JÚNIOR. Schwannomas are benign tumors derived from Schwann cells that seldom occur in the oral cavity. Tongue is the most common site of intraoral schwannomas and palatal tumors are extremely rare. Herein we report a case of an 18-year-old male patient with a 3 years evolution painless swelling on the right side of the hard palate, measuring 3.5 cm. Cone beam CT scan showed slight resorption of the right posterior palatal cortical bone. Histologic examination showed an encapsulated tumor composed of