" Plain radiograph"
" Signal characteristics"
"T2: intermediate to high signal"
"STIR/IMFS: heterogeneously high signal"
"T1 C+ (Gd): enhancement"
"Ewing sarcoma"
Expected headings
" Plain radiograph"
" Signal characteristics"
"solid, lamellated or spiculated periosteal reaction and occasionally Codman triangle 1"
"form, location and size"
"Periosteal osteosarcoma is of intermediate grade with the prognosis being better than conventional osteosarcoma, but not as good as parosteal osteosarcoma (which is usually low grade) with 5-year and 10-year survival rates of 89 and 77-86% 1,8. Bone marrow invovement is rare but if present is associated with less favourable outcome 1. Treatment usually consists in wide excision. Chemotherapy does not seem to influence prognosis or survival and has been associated with the occurance of secondary malignancies in occasional cases 9. Local recurrences, metastases and death usually occur within a period of 3 years after the diagnosis 1,8."
"History and etymology"