Over the next few years, the X-ray technician from Albuquerque, New Mexico, developed a persistent cough and wheezing, which her doctors attributed to exercise-induced asthma. She had other symptoms, too: weight loss, fever, and several bouts of pneumonia.
Still, when Rivas finally decided to perform a chest X-ray on herself, cancer was the last thing on her mind.
The image revealed a mass on her right lung that turned out to be a malignant tumor. Rivas was 32 and had never smoked a cigarette in her life. "I want people to know lung cancer can happen to anyone," she says.