Extensive wormian bones in a patient with the Hallermann-Streiff syndrome.

A case is reported of a 5-month-old girl with Hallermann-Streiff syndrome who was evaluated for possible premature closure of the cranial sutures. Skull radiographs revealed numerous Wormian bones along sutures in the parietal skull bilaterally. Hallermann-Streiff syndrome is added to the list of diseases in which extensive Wormian bones can appear.