Giant cell reparative granuloma of the ethmoid and maxillary sinusesResumo / Summary O granuloma reparativo de células gigantes é um tumor ósseo não-neoplásico incomum que representa menos que 7% dos tumores mandibulares, sua localização mais freqüen-te. Porém, já foi descrito em seios paranasais, ossos temporais e órbita. O presente trabalho descreve um paciente com granuloma reparativo de células gigantes em seios maxilar e etmoidal, comprometendo também, em menor extensão, os seios esfenoidal e frontal, e um outro paciente com acometimento circunscrito ao seio maxilar. Clinicamente, apresentam-se com proptose acentuada e macromala unilaterais, respectivamente. Os achados clínicos, tomográficos, histopatológicos e terapêuticos são descritos, ao lado de uma revisão da literatura com ênfase no diagnóstico diferencial, sobretudo com o tumor de células gigantes. The giant cell reparative granuloma is a non-neoplasic and uncommon bone tumor that represents fewer than 7% of the mandibular tumors, its most frequent site. However, this tumor has been described in paranasal sinuses, temporal bones and orbit. The present article reports a patient with a maxillo-ethmoidal giant cell reparative granuloma affecting esphenoidal and frontal sinuses, clinically with unilateral severe proptosis and facial deformity, and other patient with maxillary disease associated to macromala. The clinical, tomographic, histophatological and therapeutical findings are described. In addition, a literature review with emphasis in differential diagnosis is offered, in particular with bone giant cell tumor. Rev Bras Otorrinolaringol. V.70, n.4, 555-60, jul./ago. 2004 Palavras-chave: granuloma reparativo de células gigantes, seios paranasais, tumor ósseo. CASE REPORT RELATO DE CASO
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