Tumor formation in Hoffa's infrapatellar fat: Case report

• Autor(a) principal: Mozella,Alan de Paula
• Data de Publicação: 2015
• Outros Autores: Moller,João Victor da Silveira, Cobra,Hugo Alexandre de Araújo Barros
• Tipo de documento: Relatório
• Idioma: eng
• Título da fonte: Revista Brasileira de Ortopedia (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162015000100117
• topic: Adipose tissue; Osteochondroma; Synovial chondromatosis

Although tumors or pseudotumoral lesions are rare in the infrapatellar fat, they may affect it. Osteochondroma is the commonest benign bone tumor. However, extraskeletal presentations are rare. There are three extraskeletal variants of osteochondroma: synovial chondromatosis, para-articular chondroma and soft-tissue chondroma. We present a case of a single intra-articular lesion in the area of Hoffa's fat, in a 78-year-old female patient with a complaint of progressive knee pain associated with severe arthrosis. From the clinical and radiological findings, the diagnosis was para-articular osteochondroma. However, the histopathological findings, after excision of the lesion, showed that this was synovial chondromatosis secondary to osteoarthrosis.