Kevin’s actual medical diagnosis in Freak the Mighty is 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 syndrome’s 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 Kevin’s case, the heart grew faster than the body and this led to his demise.