title: Parosteal osteosarcoma. 2-23-year follow-up of 33 patients.
abstract: In a study of the working group for bone tumors of the German Orthopedic Society, 33 patients with a histologically confirmed parosteal osteosarcoma at reexamination underwent clinical and radiographic follow-up. Local recurrence occurred in all the cases after intralesional surgery and in 4 of 8 cases after marginal excision. The grade of differentiation was decisive for the prognosis. Despite intralesional surgery, the prognosis for Grade 1 tumors was good. Metastases developed in 1 of 23 patients with a Grade 1 tumor and in 4 of 9 patients with a Grade 2 tumor. The single patient with a Grade 3 tumor was treated with adjuvant chemotherapy and was free of disease after 5 years.
authors.affiliation: Orthopedic Department, University of Vienna, Austria.
authors.forename: P
authors.initials: P
authors.lastname: Ritschl
authors.forename: C
authors.initials: C
authors.lastname: Wurnig
authors.forename: G
authors.initials: G
authors.lastname: Lechner
authors.forename: A
authors.initials: A
authors.lastname: Roessner
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001859:Bone Neoplasms / Q000473:pathology / Q000601:surgery*; D002648:Child; D005260:Female; D005266:Femoral Neoplasms / Q000473:pathology / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D006811:Humerus; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local / Q000601:surgery; D012516:Osteosarcoma / Q000473:pathology / Q000601:surgery*; D011379:Prognosis; D011884:Radius; D012189:Retrospective Studies; D013977:Tibia; D013997:Time Factors