Radiolucencies with distinct borders.

: The differential diagnosis of circumscribed radiolucencies or those with distinct borders requires careful evaluation of lesion-specific characteristics. This evaluation is necessary because of the variable prognosis and possible aggressiveness of lesions that may fall into this category, which also contains many benign conditions. This section reviews the clinical features, radiographic appearance, histopathologic findings, and treatment recommendations for a selected group of lesions.