Country singer Justin Moore revealed that he experienced a cancer scare when doctors discovered the medical condition that left him with a “fat neck.” The “Small Town USA” hitmaker, 42, said he initially feared the growth on his neck could be something more serious, but doctors determined it was benign fatty tissue — and advised against surgery that could’ve threatened his career. “I’ve had some health issues. Nothing life-threatening, thankfully. I’ve got a – I don’t know if you can see this on my neck, I’m sure people think, ‘Golly, he’s been eatin’ good,’” Moore told Tracy Lawrence’s “TL’s Road House” podcast on Wednesday. “We thought…