achondroplasty; osteosclerosis congenita; Parrot’s disease (2); a type of chondrodystrophy characterized by an abnormality of conversion of cartilage into bone, predominantly affecting the epiphyses of long bones in which epiphysial growth is retarded and ceases early, resulting in dwarfism apparent at birth, with short extremities, but normal trunk; the head is frequently enlarged, with flattened nose, due to midfacial hypoplasia; autosomal dominant inheritance.
Radiographic Appearance – Radiology:
Skeletal X-Ray
Short bowed wide bones with expanded ends
Increased bone density
Characteristic cupping of metaphases
Incomplete glenoid fossa and acetabulum
Wide joint spaces  

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