but it turns out onene viewer s listening and watching a lot more closely than most. she noticed something. a lump, not his adam's apple. this w lower. and she called the production company immediately. she's a registered nurse in texas who said, get to a doctor. tarek el moussa checked in with us today. here's what the nurse t toldhim. >> this is not a joke. i'm a registered nurse and i have seen the lump on your neck. you need to get that checked out right away. >> reporter: he did. and the doctor diagnosed thyroid cancer. he'd been to a doctor before, but says he was told not to worry. >> in this case, the doctor didn't notice. a random nurse that was watching televisision did. >> yeah, i actually went to see my doctor multiple times, physically looked at it, it was noug. >> reporter: he tells everyone, trust your gut. get a second and third opinion. tonight, in remission. house, hoping to flip and just this week, reuniting with that nurse from texas. hugging tarek. and you can see him saying, "thank you, thank you." >> the night i had my surgery, we were texting back and forth d it was like 2:00 a.m. in texas, but