bone cancer is a different type of cancer than leukemia, its usually found in the long bones in growing/adolescent people, its why you see its always associated with the legs, extremely rare instance was found in the ribs or elsewhere. interesting to know how much benzene is in the spray, it usually associated with industrial exposure in a non-circulating room. sorry for the diagnosis.

i had a cousin that never smoked, or had 2nd hand smoke but one day developed progressive coughing, with fever, and then blood in the sputum, turns out it was lung cancer that went to both lungs. hes like a gamer type so its a shutin, apparently its rare, because smoking causing specific type and its predictable, its also more likely better prognosis since it would pretty obvious symptoms, but its not so obvious in non-smokers so it displays as advanced case. we theorized it could be in house chemicals, like cleaners, i wonder if its RADON exposure since hes inside all the time, but they dont have a basement though, no asthma or allergies. the mom is less exposed, since she often goes outside all the time.