Krishna Swaroop, Duddi SreehariBai, Sarala JothiShanthi, VRamakrishna, B A2008-01-182009-05-292008-01-182009-05-292008-01-18Krishna Swaroop DS, Bai SJ, Shanthi V, Ramakrishna BA. Osteochondroma-like parosteal osteosarcoma. Indian Journal of Pathology & Microbiology. 2008 Jan-Mar; 51(1): 58-60http://imsear.searo.who.int/handle/123456789/73659Parosteal osteosarcoma is a well-differentiated, predominantly fibro-osseous variant of osteosarcoma, accounting for 5% of all osteosarcomas. We report a case of parosteal osteosarcoma in the metaphyseal area of right femur, of 2 years' duration in a male aged 35 years. It was mistaken for osteochondroma in the initial biopsy, and the possibility of bizarre parosteal osteochondromatous proliferation (BPOP) was also considered. Subsequent excision of the tumor showed it to be a parosteal osteosarcoma. The patient had recurrence of the lesion after 1 year, and he attended a cancer institute. Follow-up showed metastases of the tumor on bone scan.engAdultBone Neoplasms --pathologyDiagnosis, DifferentialFemur --pathologyHumansMaleNeoplasm MetastasisOsteochondroma --diagnosisOsteosarcoma --diagnosisRecurrenceCase Reports