Xeroradiography in relation to a Stafne bone cavity.

A symptomless radiolucency was noted to be lying between the inferior dental canal and the lower border of the left side of the mandible. Sialography of the left submandibular gland showed the existence of salivary gland tissue in relation to this radiolucency. However, xeroradiography revealed that this radiolucency was formed by an infolding of the lower border of the mandibular cortex, thus supporting the hypothesis that a Stafne bone cavity arises from the incorporation of salivary tissue into the developing mandibular cortical bone.