Grover Cleveland, 1885-1889 and 1893-1897 —
Grover Cleveland suffered from obesity and gout and was treated for cancer in his jaw while in office.
"President Cleveland was one of the most compelling stories of concealment in the high office," said Jerrold Post, professor emeritus of psychiatry, political psychology and international affairs at George Washington University. "He was brushing his teeth one day and found a lump on roof of the mouth. Instead of telling the public, he smuggled his dentist, head and neck surgeon and surgical team onto a pleasure yacht, where they removed the roof of his mouth to get rid of the carcinoma. He emerged a week later complaining of a toothache."