What is Kevin's actual medical diagnosis in Freak the Mighty?

Kevins actual
medical diagnosis inis morquio syndrome. This is a recessive genetic disease whereby the body
lacks or has an insufficient quantity of the substance that is required for the breakdown of
glycosaminoglycans. A progressive accumulation of glycosaminoglycans to a certain level causes
organ damage. Kevin displayed a number of the syndromes symptoms including dwarfism. He is
described as being about only three feet tall, a height way below par for an eighth grader. This
is in addition to an abnormal skeleton development and hyper mobile joints that render him
immobile by way of legs causing him to use crutches as a walking aide and also have leg braces.
In addition to that, Kevin experienced scoliosis, a bending of the spinal cord that caused him
to have a twisted body. This syndrome basically results in internal body organs to develop much
faster than the body itself leading to life threatening consequences. In Kevins case, the heart
grew faster than the body and this led to his demise.

href="https://medlineplus.gov/ency/article/001206.htm">https://medlineplus.gov/ency/article/001206.htm