In January 2017, he was selected to attend a combat dive school, which required a chest X-ray. He got one on Jan. 13, 2017, at Womack Army Medical Center at Fort Bragg. The results, he believed, were normal.
But one of the dive school doctors told Stayskal that - given the damage to his left lung in Iraq - he needed a more thorough evaluation of his chest. So, on Jan. 27, 2017, he underwent a CT scan at Womack.
"They said, 'We'll call you if there's anything to notify you about,'" Stayskal said. "And I didn't hear a word about it after."
He was cleared for dive school. But soon he found he could no longer run three miles without struggling. He failed a test in which his hands and feet were tied in the water because he couldn't seem to breathe. He was wheezing. Then, he started coughing up blood.
About five months later, he was rushed to Womack's emergency room. Another X-ray was taken and pneumonia was raised as a possibility. He said one doctor, though, told him that he'd rechecked his CT scan from January and thought there was "something" that needed further investigation. He was told to see a pulmonologist.
By June 2017, as he waited to get an appointment with a military lung doctor, he kept coughing up more blood. Perhaps, he thought, the symptoms were linked to lead levels at a base gun range. Maybe he had severe bronchitis or pneumonia.
"I felt like I was being waterboarded," he said. "There were times I would carry a cup around because I was spitting up blood so much."
He got permission to go to a civilian pulmonologist who could see him faster, he said. In late June of that year, he got a chest scan and a biopsy at the civilian hospital. The diagnosis: advanced lung cancer.
At one point, he said, his new civilian doctor asked him, "Why didn't you come in earlier?"
"I said, 'What are you talking about?' He was like, 'Your scan in January says you had something that points to cancer,'" Stayskal recalled. "We were like, 'Are you kidding me?'"
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New York oncologist Richard Hirschman wrote in his report that Stayskal's mass would have been diagnosed as Stage 1 if it had been caught in January 2017, and he "would have had approximately an 81% chance of a 5-year survival rate which is almost the same thing as cured."