Spondyloperipheral dysplasia is a disorder that impairs bone growth. This condition is characterized by flattened bones of the spine (platyspondyly) and unusually short fingers and toes (brachydactyly), with the exception of the first (big) toes. Other skeletal abnormalities associated with spondyloperipheral dysplasia include short stature, shortened long bones of the arms and legs, exaggerated curvature of the lower back (lordosis), and an inward- and upward-turning foot (clubfoot). Additionally, some affected individuals have nearsightedness (myopia), hearing loss, and intellectual disability.

Acromesomelic dysplasia-2C (AMD2C) is characterized by skeletal abnormalities restricted to the limbs; the craniofacial skeleton and axial skeletal structures are normal. The severity of the long bone shortening progresses in a proximal to distal direction. The hands and feet are most severely affected, but the distal phalanges are relative normal. Affected individuals have joint dislocations but the number of joints involved is not constant (summary by Thomas et al., 1996). For a discussion of genetic heterogeneity of acromesomelic dysplasia, see AMD1 (602875).