I'm so sorry to hear about your son. If you don't mind, what kind of cancer? We have a dear friend who was found to have cancer at 4 MONTHS old. It was in her abdomen. She was in the hospital for a year but survived.
She just had her 5th birthday and they found out two days later the cancer has returned. She just lost all of her hair last week (after her 3rd chemo treatment). She was very sad as she is old enough to know she looks differently than her friends now. We have made her (and are making more) cute little hats with flowers etc and that has helped. We just keep telling her that her beauty (or handsome good looks in your sons case

) don't depend on her hair. She is beautiful because of her beautiful heart that shines through her smiles. She is getting more used to it and even took off her hat at the park today because she was too hot. All of the kids there handled it so well. Brought tears to my eyes.
Love, hugs and healing to your son and all who love him!