Short stature and dwarfism are conditions that affect thousands of people throughout the United States. The general size of the chair will be more compact, so you need to ensure that every inch is accounted for. Individuals with achondroplasia will typically have shorter arms and legs and an average-sized trunk. "It's a new thing for him to learn because he doesn't need a chair during the day either.". Others aren't noticed until the first few months or years of life, when a child's growth slows. Some children with diastrophic dysplasia have breathing problems, which can lead to pneumonia. //