This is not a question. It is an article in CURE magazine. I didn't know about this myself. This may only apply in US.
Planning a flight? Do your homework first. The IATA manual's passenger care section lists the period of time a passenger must wait to fly after having experienced "acute and unstable" medical conditions like surgery or pneumonia. The manual specifically states that symptomatic cancer patients and those undergoing chemotherapy or radiotherapy must be assessed by a doctor with aviation medical experience -- which most oncologists do not have.