my grandfather, father, and i also share this late-20s growth spurt. theirs were far more significant than mine however, probably since they were both very sick at some point during their earlier growth periods.

my father was so sick he completely stopped growing. My grandparents took him to the doctor only to be told to keep him in bed, well fed, and hope for the best. for about 6 weeks my father was bedridden, and he was shorter than his younger brothers for years because of it. this pause in development showed up as a horizontal line across all of his teeth. few children this sick in the 50s ever lived, but my father was one of them. when my father was 25 he grew 1 inch.

my grandfather grew 3 inches between the time he was 25 and 27. he knew something was up when his full set (!) of dentures stopped fitting. He had all his teeth pulled at 25. I don't know why.

I only grew a half an inch taller, at about age 28. My brothers didn't see any noticeable growing after their late teens, if you don't count the waistline.

It happens. Doctors are still surprised when I tell them though. They always assume that I was simply sick for years and years, and when I got healthy again i finished growing. I explain the genetic history and they understand.

a pituitary gland tumor (which are never malignant) can be a cause for abnormal growth.