Osteocondroma patelar: relato de caso

摘要

Resumo Relato de um caso raro de osteocondroma patelar. Homem de 60 anos apresentou tumor na patela esquerda que tem se desenvolvido por 10 anos, fato raro, considerando‐se a idade do paciente e o local de surgimento do tumor. Dor leve e a presen?a da massa compunham o quadro clínico, sem limita??o da flexoextens?o ou déficit neurovascular. O tumor apresentava 8 cm longitudinal x 6 cm transversal x 3 cm anteroposterior, endurecido, aderido ao plano ósseo patelar. Nas radiografias e tomografias observamos áreas mais densas correspondentes de osso e outras menos densas, que podem corresponder à cartilagem, de crescimento lento, e irregularidades na superfície articular patelofemoral. Foi feita ressec??o simples do tumor e o anatomopatológico confirmou osteocondroma da patela. Osteocondroma, ou exostose osteocartilaginosa, abrange uma grande parte dos tumores ósseos benignos. Ele resulta de altera??es celulares que desencadeiam a produ??o desregulada de osso esponjoso. Seu tratamento é feito basicamente pela retirada cirúrgica da massa tumoral. N?o é essencial, mas recomendada para evitar les?es por contiguidade e risco de maligniza??o. Abstract The aim was to report on a rare case of patellar osteochondroma. A 60‐year‐old man presented a tumor on his left patella that had developed over a 10‐year period, which is a rare occurrence, considering the patient's age and the site at which the tumor appeared. The clinical condition comprised mild pain and the presence of a mass, without limitation of flexion‐extension or any neurovascular deficit. The tumor dimensions were 8 cm longitudinally x 6 cm transversally x 3 cm anteroposteriorly. It was hardened and was adhering to the patellar bone plane. On radiographs and tomographic scans, we observed areas of greater density corresponding to bone and other less dense areas that could correspond to slow‐growing cartilage, with irregularities on the patellofemoral joint surface. Simple resection of the tumor was performed, and the anatomopathological examination confirmed that it was a patellar osteochondroma. Osteochondroma, or osteocartilaginous exostosis, includes a large proportion of the benign bone tumors. It results from cell alterations that trigger unregulated production of spongy bone. It is basically treated by means of surgical removal of the tumor mass. This is not essential, but is recommended in order to avoid lesions caused by contiguity and the risk of malignant transformation.