Table 1.

Clinicopathological Data

Age	Range 7–82 years		Mean 22.8 years
Sex	Male		Female
	32 (56.1%)		25 (43.9%)
Histologic variant	Osteoblastic	Chondroblastic	Combined
	42 (73.7%)	6 (10.5%)	9 (15.8%)
Grade	Low	Moderate	High
	18 (31.6%)	20 (35.1%)	19 (33.3%)
Survival*	Yes	No
	13 (22.8%)	44 (77.2%)
First symptom	Pain	Swelling	Pain and swelling	Pain, swelling, and limp
	22 (38.6%)	4 (7%)	21 (36.8%)	10 (17.6%)
Tumor location	Lower third femur	Upper third tibia	Rest femur	Other sites**
	22 (38.6%)	15 (26.3%)	11 (19.3%)	9 (15.8%)
Duration***	≤3 Months	3–6 Months	>6 Months
	29 (50.8%)	22 (38.6%)	6 (10.6%)
Necrosis	Range (%)	Mean (%)	SD (%)
	20–96	71.2	25.4
Extent	90%	80%	70%–50%	≤50%
	20 (35.1%)	8 (14%)	17 (29.9%)	12 (21%)

SD, standard deviation. 

^*5 year follow-up period. 

^**Distribution: 5 Humerus, 3 Thumb, 1 Fibula. 

^***Time intervening between the emergence of the first symptom and the final diagnosis.