UNICAMERAL AND ANEURYSMAL BONE-CYSTS

Unicameral and aneurysmal bone cysts are considered tumorlike conditio ns of unclear origin. The diagnosis of unicameral bone cysts is almost always based on the radiographic appearance, whereas aneurysmal bone cyst imaging may sometimes mimic a sarcomatous lesion. Several pathoge netic hypothesis reported in literature have been described. Classific ations have been proposed to detect the activity of the cysts and to p redict the prognostic behavior. The results observed with different op tions of-treatment have been discussed.