Barry Manilow has lung cancer. What to know about the disease.

Barry Manilow is recovering after catching a "cancerous spot" on his lung early.

The 82-year-old singer revealed on Instagram that a lengthy bout with bronchitis led to the discovery of the cancer spot.

"Even though I was over the bronchitis and back on stage at the Westgate Las Vegas, my wonderful doctor ordered an MRI just to make sure that everything was OK," he wrote in the Instagram statement. "The MRI discovered a cancerous spot on my left lung that needs to be removed. It's pure luck (and a great doctor) that it was found so early. That's the good news."

Lung cancer is the leading cause of cancer deaths in the United States, and the second most common cancer diagnosis, according to the National Cancer Institute.

Here's what you need to know about the disease.