since you are defecient in vitamin d, go buy some supplements and take it every day, ask a physician if the testosterone is recoverable. when did this all start, yes please urge your doctor to see the endocrinologist. most likely its your vitamin d issues causing your problems. you should also check for other metabolic disorders, like diabetes,hyper or hypothyroidism.
cancer is highly unlikely, because cause more serious issues.
Hi I also have very low testosterone Mine is caused by Diabetes, I was prescribed a roll on treatment it worked wonders I had energy my life was 100%better then someone came out with the dangers of testosterone treatments. Now I cant get the help I had , I would take my chances so I can live my life with the medication and be happy and feel good . then to have no energy and sit like a vegetable all day . Free Country????????
HE SHOULD GET check with diabetes.