Research Article

Prognostic Factors and Treatment Results of High-Grade Osteosarcoma in Norway: A Scope Beyond the “Classical” Patient

Table 3

Patients who received inadequate treatment dependent of subgroup of high-grade osteosarcoma (OS).

PatientsaNot adequate treatment (%b)Reason for inadequacy
Surgery (%c)Chemotherapy (%c)Both (%c)

Classical OS20056 (28)0 (0)52 (93)4 (7)
Nonclassical OS218146 (67)32 (22)45 (31)69 (47)
 Nonextremity only3920 (51)9 (45)6 (30)5 (25)
 Primary metastasis only4623 (50)15 (65)2 (9)6 (26)
 Age >40 only4532 (71)0 (0)24 (75)8 (25)
 Several factors combined8871 (81)8 (11)13 (18)50 (71)

Six uncertain cases were not included. bIn % of cases from second column. cIn % of all cases of inadequate treatment for each subgroup.