Anatomical Variation of Asterion in Human Dry Skull – A Case Report

Sutural bones are usually small, irregularly shaped ossicles, often found in the sutures of the cranium, especially those in relation with the parietal bones. Their size, shape and number vary from skull to skull. The asterion corresponds to the site of the posterolateral (mastoid) fontanelle of the neonatal skull which closes at the end of the first year. The asterion is the junction of the parietal, temporal and occipital bones. During the routine osteology demonstration class for undergraduate students, five Wormian bones were noted at the asterion in an adult skull. The asterion is a surgical landmark to the transverse sinus location which is of great importance in the surgical approaches to the posterior cranial fossa. The study of asterion may be helpful to ENT and Neurosurgeon