. >> jennifer and todd feltner's dream was to have a large family.hild was parker and then came paris, two years later. she was an adorable baby. but at 6 months, she had freckles. >> we went back for the 9-month checkup and that's when the doctor said there are more and they're darker. >> they were referred to a specialist. >> we were looking things up in books. they were calling people on the phone. and the longer we sat there, the more our hearts dropped. >> then finally a diagnosis. >> paris tested positive for xp. and that's the last thing i heard. >> xp is xeroderma pigmentosum. >> dr. barry cunningham has been treating the rare disorder for years. any one of us can get skin cancer. in fact, one in five of us will. but for paris, who had to wear this full bodysuit after she was diagnosed as a baby, the odds are much worse. she lacks the enzyme that repairs dna damage caused by sunlight every day. that means she's 20,000 times more likely to develop cancer when unprotected. >> if you have a kid who is wearing a hood and some joker on the playgro