Adam Rainer (1899 – 4 March 1950) was an Austrian man who was the only person in recorded history to have been both a dwarf and a giant.

Several years later, likely as a result of a pituitary tumor that was identified later, Rainer had a dramatic growth spurt.

[6] Two doctors examined Rainer in detail between August 1930 and May 1931, at which time his height was 216 cm (7 ft 1 in).

[4] Prior to the removal of the tumor, Rainer had already been rendered weak and unable to stand due to his malfunctioning pituitary gland and the rapid growth that resulted.

Shortly after the surgery, Rainer entered a "home for the aged" where he resided for the remainder of his life.