Pyknodysostosis


 * Autosomal recessive transmission
 * Characterized by:
 * Osteosclerosis
 * Frontal and occipital bossing
 * Short stature
 * Short broad hands and hypoplasia of the nails
 * Often the patients have multiple fractures.

Imaging Findings

 * Narrowed medullary cavities
 * Acroosteolysis
 * Marked delay in closure of the sutures
 * Wormian bones
 * Sclerosis of vertebral bodies and errors in vertebral segmentation