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Dedifferentiated parosteal osteosarcoma.

Wold, L E; Unni, K K; Beabout, J W; Sim, F H; Dahlin, D C


Parosteal osteosarcoma is an uncommon malignant tumor of bone, and in a review of Mayo Clinic records we identified eleven cases of so-called dedifferentiated parosteal osteosarcoma. Ten of the eleven patients had had a long history of treatment for multiple recurrences of the tumor as a low-grade parosteal osteosarcoma and then for a definite recurrence as a high-grade undifferentiated osteosarcoma. The prognosis in this group of patients was similar to that in patients with conventional osteosarcoma.

Copyright © 1984 by The Journal of Bone and Joint Surgery, Incorporated
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