RESUMO
A rare case of mandibular odontogenic fibroma is presented which transformed to a stage 1A odontogenic fibrosarcoma with a local recurrence after surgical resection and unusually delayed pulmonary metastases eight years later. Prolonged follow-up of these patients after complete surgical resection, including regular chest X-rays, is recommended.
Assuntos
Fibrossarcoma/secundário , Neoplasias Pulmonares/secundário , Neoplasias Mandibulares/patologia , Tumores Odontogênicos/patologia , Neoplasias de Tecidos Moles/secundário , Adulto , Transformação Celular Neoplásica , Humanos , Masculino , Neoplasias Mandibulares/cirurgia , Recidiva Local de Neoplasia/patologia , Tumores Odontogênicos/cirurgiaRESUMO
PURPOSE: The effect of occlusion of the external carotid system on blood flow of the internal maxillary artery was investigated in 16 dogs. METHODS: The external carotid system was occluded by ligation or clamping at different levels separately or simultaneously and the blood flow of the internal maxillary artery was measured with an electromagnetic flowmeter before and after each occlusion. RESULTS: The ligation of the external carotid artery below (low ligation) and above (high ligation) the origin of the occipital, lingual, and facial arteries reduced the blood flow by 61.1% and 71.5%, respectively. Low ligation together with ligation of the lingual artery reduced the blood flow by 73.5%. Multiple ligations (high and low ligations combined with ligations of the occipital, lingual, and facial arteries) reduced the blood flow by 81.8%. The internal maxillary artery was sectioned after the multiple ligations, and retrograde flow from the distal segment was studied. The flow was only a trace and could not be measured with the flowmeter. Total blood loss from both ends almost equaled the blood flow of the proximal segment, 18.2% of normal. CONCLUSIONS: Multiple occlusion appears to be the most effective treatment for hemorrhage from the initial part of the internal maxillary artery.
Assuntos
Artéria Carótida Externa/cirurgia , Técnicas Hemostáticas , Artéria Maxilar/lesões , Artéria Maxilar/fisiologia , Hemorragia Bucal/cirurgia , Animais , Velocidade do Fluxo Sanguíneo , Cães , Fenômenos Eletromagnéticos , Face/irrigação sanguínea , Hemostasia Cirúrgica , Ligadura , Fluxo Sanguíneo Regional , Reologia/instrumentação , Língua/irrigação sanguíneaRESUMO
Leiomyosarcoma of the oral region has rarely been reported. A review of the literature yield only 24 cases. The histopathology with special reference to ultrastructural findings and immunohistochemical examination of an additional case of leiomyosarcoma of mandibular gingiva has been presented. The manifestation and symptoms, treatment and prognosis, and the origin of this tumor are discussed. Because of the high rate of local recurrence and metastases, extensive surgical excision and long-term follow-up are mandatory.
