This is an extremely rare condition, afflicting perhaps one person in a million.

Lincoln had all the essential features of MEN2B:

MEN2B feature	Abraham Lincoln
"Marfanoid" body shape	Tall. Long limbs. Small, thin head.
Large, bumpy lips	Large lower lip. Bumps on lower and upper lips.
Intestinal symptoms	Constipated.
Cancer	Emaciated by the end of his life.
Dominant genetics	Three sons with large, bumpy lips.
Muscular involvement	Multiple signs of low muscle tone.

The Physical Lincoln discusses each of these topics (and more) in detail, reviewing evidence for and against the MEN2B theory, including the greatest challenge to the diagnosis: Lincoln's longevity.

Most importantly, however, Dr. Sotos contributes an enormous amount of new material to the study of the physical Lincoln, extracted from original sources.