24 Platyspondylic lethal skeletal dysplasia, Torrance type is a severe disorder of bone growth.People with this condition have very short arms and legs,underdeveloped pelvic bones, and unusually short fingers and toes (brachydactyly).This disorder is also characterized by flattened spinal bones (platyspondyly) and an exaggerated curvature of the lower back (lordosis).Infants with this condition are born with a small chest with short ribs that can restrict the growth and expansion of the lungs