The differential diagnosis of globulomaxillary radiolucencies.

The differential diagnosis of radiolucencies which occur in the globulomaxillary region includes a variety of odontogenic cysts and tumors, inflammatory lesions, and a number of nonodontogenic conditions. The accumulating embryologic and histopathologic evidence suggests that the development of fissural cysts in this region of the maxilla is highly unlikely. If they occur at all, such cysts must be extremely rare indeed and therefore do not belong on any clinician's list of differential diagnoses.