He has also been hospitalised numerous times for multiple different illness
Pneumonia (pneumonia is a complication of oesophageal cancer)
Food poisoning where apparently he was "died for nine minutes"
In terms of prognosis for esophageal cancer
"Oesophageal cancer remains one of the most lethal of all malignancies.Survival depends on stage of disease and treatment. With aggressive therapy involving surgery and chemoradiotherapy , 5-year survival for stage 1 disease approaches 80%; for stage 2 disease, it approaches 60%; for stage 3 disease, it ranges between 30% and 50%."
We don't know hiw advanced his cancer is but if he has the most minor staging of cancer he has a 20% chance probability of dying within 5 years