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Upper Lip Neurilemmoma in a Pediatric Patient: A Case Report
ORAL AND MAXILLOFACIAL PATHOLOGY e70 Abstracts mucous cells and sometimes showing papillary proliferations. Solid arrangements of squamous cells groups were also seen in few areas of the lesion. The final diagnosis was low-grade mucoepidermoid carcinoma. The patient was referred to an oncology center.
PCC-231 - PLEOMORPHIC ADENOMA OF THE LOWER LIP: A CASE REPORT. TEREZA KARLA VIEIRA LOPES DA COSTA, JÉSSICA SOUSA BRITO, AUTRAN DA NÓBREGA ALVES, CASSIANO FRANCISCO WEEGE NONAKA, POLLIANNA MUNIZ ALVES, GUSTAVO PINA GODOY. UNIVERSIDADE ESTADUAL DA PARAÍBA. Pleomorphic adenoma (PA) is the most common neoplasm of the major salivary glands and has occasionally shown a tendency to undergo malignant transformation. Although the etiology of PA is unknown, chromosome abnormalities involving 8q12 and 12q15 have been described. There have been few reports of PA of the lower lip. A 37-year-old female presented with a firm, painless mass, with well-defined limits, in the lower lip mucosa, that evolved over the course of 20 years. The patient reported a history of trauma in the region. The diagnostic hypothesis was traumatic fibroma. The lesion was biopsied, and the histopathological analysis revealed a benign neoplasm characterized by proliferation of epithelial and myoepithelial cells, forming ductal structures in a chondromyxoid stroma. The final diagnosis was PA. During a 2-year follow-up period, there were no signs of tumor recurrence.
PCC-232 - UPPER LIP NEURILEMMOMA IN A PEDIATRIC PATIENT: A CASE REPORT. NATHÁLIA DE ALMEIDA FREIRE, RAPHAELA CAPELLA, FÁBIO RAMOA PIRES, SÉRGIO WINDSON, STEPHANIE NOVAES, MÔNICA SIMÕES ISRAEL, SARAH APARECIDA ANTERO. UNIVERSIDADE DO ESTADO DO RIO DE JANEIRO. Neurilemmoma is a lesion that accounts for only 1% of all benign tumors. Although 25e48% of cases occur in the head and neck region, neurilemmoma is rarely found in the oral cavity. A 13-year-old black male sought treatment at our clinic, presenting with a normochromic nodular lesion, on the upper lip, that had first appeared 1 year earlier. Mobility and pain were present upon palpation. The diagnostic hypotheses were pleomorphic adenoma, adenoid cystic carcinoma, and lipoma. An excisional biopsy was performed, and the histopathological examination confirmed a diagnosis of neurilemmoma. The diagnosis was surprising, not only because the lesion is rare but also because the age of the patient and the affected area were unusual. The authors would like to emphasize the fact that clinical examination is not sufficient to diagnose nodular lesions of the lips. The clinical features are nonspecific, and histopathological analysis is indispensable.
PCC-233 - TRAUMATIC NEUROMA OF THE MANDIBLE WITH SPONTANEOUS REMISSION. KÁRITA CRISTINA SILVA, BRUNO CORREIA JHAM, CLÓVIS MARTINS SILVA, ALINE CARVALHO BATISTA, ELISMAURO FRANCISCO DE MENDONÇA, NÁDIA DO LAGO COSTA. UNIVERSIDADE FEDERAL DE GOIÁS. Traumatic neuroma is a well-known disorder, involving peripheral nerves, which occurs following trauma or surgery. A 22-year-old female presented with an intraosseous traumatic neuroma, discovered incidentally on a panoramic radiograph
OOOO August 2015 obtained for orthodontic documentation. The lesion was an ill-defined multilocular radiolucency on the left side of the mandible, extending from the second premolar to the mandibular ramus. Surgical treatment was scheduled, but the patient was lost to follow-up. Five years later, the patient returned seeking care, and an incisional biopsy was performed. Histopathological examination and immunohistochemical studies confirmed the diagnosis of traumatic neuroma. Surprisingly, 11 months later, regression of the lesion was observed. The patient is currently under close follow-up. Our report shows that traumatic neuromas should be included in the differential diagnosis of radiolucent lesions in the jaws and that, on very rare occasions, the lesion can spontaneously regress.
PCC-234 - TONGUE LYMPHANGIOMA: A CASE REPORT. RAPHAEL LÔBO DE SOUZA, BETHÂNIA SILVA SANTOS, NICOLY GUIMARÃES OLIVEIRA, DANIELLA SANTOS MARINHO DE ALMEIDA SILVA, VERUSCHKA HANA SAKAKI SOUZA MONTEIRO, GLEICY GABRIELA VITÓRIA SPÍNOLA CARNEIRO, MÁRCIO CAMPOS OLIVEIRA. UNIVERSIDADE ESTADUAL DE FEIRA DE SANTANA. Lymphangiomas are rare congenital tumors, with up to 70% reported in the head and neck region. They account for approximately 25% of all vascular neoplasms in children and adolescents and approximately 25% of cervical cysts. The appearance of lymphangiomas varies from a single soft mass to lobulated multicystic masses. A 13-year-old black male presented with a symptomatic pink blister on the dorsum of the tongue, measuring 50 mm in diameter, which had first appeared 24 months earlier. The diagnostic hypothesis was lymphangioma. Preoperative hematological tests were requested, and the results were within normal limits. An incisional biopsy was performed under local anesthesia, and the histopathological examination confirmed the diagnostic hypothesis of lymphangioma. The patient was referred to a head and neck surgeon for evaluation of the case. After 11 months of clinical follow-up, the lesion was stable and presented no significant growth.
PCC-235 - ORAL FOCAL MUCINOSIS: REPORT OF 2 CASES WITH HISTOCHEMICAL AND IMMUNOHISTOCHEMICAL ANALYSIS. AMANDA KATARINNY GOES GONZAGA, TIAGO JOÃO DA SILVA FILHO, DENISE HÉLEN IMACULADA PEREIRA DE OLIVEIRA, MARIA LUIZA DINIZ DE SOUSA LOPES, LÉLIA MARIA GUEDES QUEIROZ, ÉRICKA JANINE DANTAS DA SILVEIRA. UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE. Oral focal mucinosis (OFM) is a rare disease, characterized by overproduction of hyaluronic acid by fibroblasts, concomitant with the production of collagen, resulting in focal myxoid degeneration. Its diagnosis is based on histopathological analysis complemented by histochemical and immunohistochemical methods. Here we report 2 asymptomatic cases: 1 in a 37-yearold female presenting with a lesion on the hard palate measuring 0.5 cm; and the other in a 27-year-old female presenting with a gingival lesion measuring 0.7 cm. Microscopic examination revealed areas of myxomatous connective tissue permeated by spindle-shaped fibroblasts and mild inflammatory infiltrate, limited by dense connective tissue, thus establishing OFM as the diagnosis. The analysis with Alcian Blue showed
PCC-231 - PLEOMORPHIC ADENOMA OF THE LOWER LIP: A CASE REPORT. TEREZA KARLA VIEIRA LOPES DA COSTA, JÉSSICA SOUSA BRITO, AUTRAN DA NÓBREGA ALVES, CASSIANO FRANCISCO WEEGE NONAKA, POLLIANNA MUNIZ ALVES, GUSTAVO PINA GODOY. UNIVERSIDADE ESTADUAL DA PARAÍBA. Pleomorphic adenoma (PA) is the most common neoplasm of the major salivary glands and has occasionally shown a tendency to undergo malignant transformation. Although the etiology of PA is unknown, chromosome abnormalities involving 8q12 and 12q15 have been described. There have been few reports of PA of the lower lip. A 37-year-old female presented with a firm, painless mass, with well-defined limits, in the lower lip mucosa, that evolved over the course of 20 years. The patient reported a history of trauma in the region. The diagnostic hypothesis was traumatic fibroma. The lesion was biopsied, and the histopathological analysis revealed a benign neoplasm characterized by proliferation of epithelial and myoepithelial cells, forming ductal structures in a chondromyxoid stroma. The final diagnosis was PA. During a 2-year follow-up period, there were no signs of tumor recurrence.
PCC-232 - UPPER LIP NEURILEMMOMA IN A PEDIATRIC PATIENT: A CASE REPORT. NATHÁLIA DE ALMEIDA FREIRE, RAPHAELA CAPELLA, FÁBIO RAMOA PIRES, SÉRGIO WINDSON, STEPHANIE NOVAES, MÔNICA SIMÕES ISRAEL, SARAH APARECIDA ANTERO. UNIVERSIDADE DO ESTADO DO RIO DE JANEIRO. Neurilemmoma is a lesion that accounts for only 1% of all benign tumors. Although 25e48% of cases occur in the head and neck region, neurilemmoma is rarely found in the oral cavity. A 13-year-old black male sought treatment at our clinic, presenting with a normochromic nodular lesion, on the upper lip, that had first appeared 1 year earlier. Mobility and pain were present upon palpation. The diagnostic hypotheses were pleomorphic adenoma, adenoid cystic carcinoma, and lipoma. An excisional biopsy was performed, and the histopathological examination confirmed a diagnosis of neurilemmoma. The diagnosis was surprising, not only because the lesion is rare but also because the age of the patient and the affected area were unusual. The authors would like to emphasize the fact that clinical examination is not sufficient to diagnose nodular lesions of the lips. The clinical features are nonspecific, and histopathological analysis is indispensable.
PCC-233 - TRAUMATIC NEUROMA OF THE MANDIBLE WITH SPONTANEOUS REMISSION. KÁRITA CRISTINA SILVA, BRUNO CORREIA JHAM, CLÓVIS MARTINS SILVA, ALINE CARVALHO BATISTA, ELISMAURO FRANCISCO DE MENDONÇA, NÁDIA DO LAGO COSTA. UNIVERSIDADE FEDERAL DE GOIÁS. Traumatic neuroma is a well-known disorder, involving peripheral nerves, which occurs following trauma or surgery. A 22-year-old female presented with an intraosseous traumatic neuroma, discovered incidentally on a panoramic radiograph
OOOO August 2015 obtained for orthodontic documentation. The lesion was an ill-defined multilocular radiolucency on the left side of the mandible, extending from the second premolar to the mandibular ramus. Surgical treatment was scheduled, but the patient was lost to follow-up. Five years later, the patient returned seeking care, and an incisional biopsy was performed. Histopathological examination and immunohistochemical studies confirmed the diagnosis of traumatic neuroma. Surprisingly, 11 months later, regression of the lesion was observed. The patient is currently under close follow-up. Our report shows that traumatic neuromas should be included in the differential diagnosis of radiolucent lesions in the jaws and that, on very rare occasions, the lesion can spontaneously regress.
PCC-234 - TONGUE LYMPHANGIOMA: A CASE REPORT. RAPHAEL LÔBO DE SOUZA, BETHÂNIA SILVA SANTOS, NICOLY GUIMARÃES OLIVEIRA, DANIELLA SANTOS MARINHO DE ALMEIDA SILVA, VERUSCHKA HANA SAKAKI SOUZA MONTEIRO, GLEICY GABRIELA VITÓRIA SPÍNOLA CARNEIRO, MÁRCIO CAMPOS OLIVEIRA. UNIVERSIDADE ESTADUAL DE FEIRA DE SANTANA. Lymphangiomas are rare congenital tumors, with up to 70% reported in the head and neck region. They account for approximately 25% of all vascular neoplasms in children and adolescents and approximately 25% of cervical cysts. The appearance of lymphangiomas varies from a single soft mass to lobulated multicystic masses. A 13-year-old black male presented with a symptomatic pink blister on the dorsum of the tongue, measuring 50 mm in diameter, which had first appeared 24 months earlier. The diagnostic hypothesis was lymphangioma. Preoperative hematological tests were requested, and the results were within normal limits. An incisional biopsy was performed under local anesthesia, and the histopathological examination confirmed the diagnostic hypothesis of lymphangioma. The patient was referred to a head and neck surgeon for evaluation of the case. After 11 months of clinical follow-up, the lesion was stable and presented no significant growth.
PCC-235 - ORAL FOCAL MUCINOSIS: REPORT OF 2 CASES WITH HISTOCHEMICAL AND IMMUNOHISTOCHEMICAL ANALYSIS. AMANDA KATARINNY GOES GONZAGA, TIAGO JOÃO DA SILVA FILHO, DENISE HÉLEN IMACULADA PEREIRA DE OLIVEIRA, MARIA LUIZA DINIZ DE SOUSA LOPES, LÉLIA MARIA GUEDES QUEIROZ, ÉRICKA JANINE DANTAS DA SILVEIRA. UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE. Oral focal mucinosis (OFM) is a rare disease, characterized by overproduction of hyaluronic acid by fibroblasts, concomitant with the production of collagen, resulting in focal myxoid degeneration. Its diagnosis is based on histopathological analysis complemented by histochemical and immunohistochemical methods. Here we report 2 asymptomatic cases: 1 in a 37-yearold female presenting with a lesion on the hard palate measuring 0.5 cm; and the other in a 27-year-old female presenting with a gingival lesion measuring 0.7 cm. Microscopic examination revealed areas of myxomatous connective tissue permeated by spindle-shaped fibroblasts and mild inflammatory infiltrate, limited by dense connective tissue, thus establishing OFM as the diagnosis. The analysis with Alcian Blue showed