Is primary bome cancer rare what are the chances of a 22yo female getting it?

Yes, quite rare: Bone Cancer is rather uncommon. yet it does occur and occurs more in the younger subjects. So a 22 year old female is not exempt from Bone cancer. If she has a swelling or persistent pain in a bone, an X-rays of the bones is advised to look into it further.

Bone cancer: Very rare in general but rare cases do occur. Osteogenic sarcoma affects 400 children under age 20 and 500 adults (most between the ages of 15-30) every year in the USA. See your doctor if you have concerns.