Table 1. Clinicopathological characteristics of the osteosarcoma population.

Clinicopathological characteristics		N	%
Age at diagnosis (years)	<10	06	18.2
	≥10	27	81.8
	mean 15
Gender	female	17	51.5
	male	16	48.5
Tumor site	femur	12	36.4
	tibia	12	36.4
	humerus	06	18.2
	fibula	03	9.0
Histological type*	osteoblastic	24	77.4
	chondroblastic	03	9.7
	fibroblastic	03	9.7
	telangiectatic	01	3.2
Huvos grade*	grade 1	07	23.3
	grade 2	14	46.7
	grade 3	07	23.3
	grade 4	02	6.7
Tumor size* (cm)	<12	11	52.4
	≥12	10	47.6
Metastasis (during treatment)	no	23	69.7
	yes	10	30.3

*Number of patients with available information.