Before revision: Finally, surgery is recommended in cases where patients have the presence of cholesterol crystals or inflammatory apical true cysts (the top of an enclosed space lined by the epithelium and usually contains fluid) due to the fact that these can prevent the healing of the lesions .
After revision: Finally, surgery is recommended in cases where patients have the presence of cholesterol crystals or inflammatory apical true cysts (the top of an enclosed space lined by the epithelium and usually contains fluid) due to the fact that these can prevent the healing of the lesions