Leslie Stoll developed a blood clot that led to a pulmonary embolism after she broke her leg in 2014. The embolism was treated, but another occurred when Stoll had surgery on her foot years later. After the treatment, she was referred to a hematologist who could prescribe blood thinners and monitor the clot.

At an appointment in 2024, the hematologist recommended a CT scan. It showed a small anomaly in her lungs. Stoll wasn't worried: She was an athlete and former boxer who had never smoked. Her lung function felt normal.

"I tried to reassure him that it was nothing, and it was probably something that was damaged from my pulmonary embolism, and he didn't think I was very good at diagnosing myself," Stoll told CBS News. "He was like, 'Well, it probably is nothing, but let's schedule a PET

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