Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 1 Demographic data

From: Definitive surgery of primary lesion should be prioritized over preoperative chemotherapy to treat high-grade osteosarcoma in patients aged 41–65 years

Sex
Male	16
Female	13
Age	52.8 years (41–65 years)
Follow-up period	103.2 months (5–321 months)
Primary/secondary
Primary	25
Secondary	4
Cause of disease
Fibrous dysplasia	1
Paget’s disease	1
Radiation induced	2
Primary site
Pelvis	7
Proximal femur	5
Distal femur	5
Proximal tibia	4
Other	8
Pathological subtype
Osteoblastic	22
Fibroblastic	5
Chondroblastic	1
Small cell type	1
UICC TMN staging system
IIA	8
IIB	21

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