It is indeed a case with conflicting data but the Wiki article, if accurate, had a few salient points regarding his medical exam.
https://en.wikipedia.org/wiki/Falcon_Lake_Incident
"According to Michalak, he was disoriented from the event, feeling nauseous, and eventually vomiting, and attempted to return to his motel room at the Falcon Motor Hotel. A nearby
highway patrol officer from the
Royal Canadian Mounted Police (RCMP), Constable G.A. Solotki, who had spotted Michalak assumed he was drunk,
[2] but did not smell alcohol on Michalak. Solotki's report indicated that he offered to help Michalak return and seek treatment at Falcon Beach, but was declined.
[7] According to Michalak's account, Solotki was dismissive of his situation and refused to offer him aid.
[7] He safely returned, talking with the owner of the motel about seeing a doctor, but was told that the local doctor was absent.
[2] Michalak then rested and phoned his wife telling her that an accident had occurred, and that he would return to his home in
Winnipeg by means of the
Greyhound bus.
[7][1] Upon returning home, Michalak sought medical attention at the
Misericordia Health Centre[13][7] for his injuries, and was admitted to the emergency room.
[2]
"Michalak experienced burns on his chest and stomach which matched with his claims of being hit by the exhaust panel. A grid-like pattern of raised sores from his burns appeared on Michalak's body.
[14][12] Michalak continued to suffer from prolonged bouts of diarrhea, headaches, blackouts, and continued weight loss, eventually seeking help from the
Mayo Clinic.
[1] The Mayo Clinic's report determined that Michalak was of sound mind.
[12] His physical condition following the event was allegedly consistent with
radiation poisoning,
[9] but tests administered at
Pinawa, Manitoba, following the incident came up negative.
[3][15] Michalak allegedly lost 13 pounds (6 kg) following the incident,
[2] with his
lymphocyte count drastically falling to near lethal levels.
[15] He continued to suffer from intermittent reappearances of his burns,
[14] and its effects would never fully subside by the time Michalak died in 1999"
The RCMP report emphasized their inability to explain Michalak's physical effects, burns, and the burned circle of vegetation from the site.
[
Analysis of the site yielded unusual results, including a 4.5-meter (15 ft) circle of burned vegetation in the site Michalak claimed the landing occurred,
[14] and the presence of highly radioactive elements within soil samples and clothing Michalak had removed.
[9][1] Metal that was superheated was found to have been melted into cracks of rock and exhibited high levels of radioactivity.
[8][1][4] The anomalous readings were subsequently uncovered to be due to a
radium vein which was near the site...."
Skeptics later said his body marks were an 'allergy'....not ikely imho to be in a grid pattern , and that he or someone else planted materials and burn marks in the area after the fact to bolster his tale....really?
I believe he had an anomalous experience but like so many of these events it remains bizarre, lacking any apparent reaon, and seems inconsistent.