Object: Histopathological observations and biochemical analysis of sutural
bones in nine patients with craniosynostosis were compared with control sub
jects of the same age range. Methods: Microscopic examination in craniosyno
stosis showed formation of an active osseous front, with higher osteoblasti
c activity than in controls. Biochemical analysis revealed higher calcium,
phosphorus, alkaline phosphatase, phospholipids and chondroitin sulphate-A
contents in sutural bones of the same patients. Conclusions: The present st
udy systematically establishes a premature increase in osteogenesis in the
sutures of craniosynostosis patients.