In the treatment of premalignant epithelial cancers of the female lower genital tract, the CO2 laser beam is used with precision through a surgical microscope for tissue ablation and excision. Intra-abdominal vaporization of abnormal tissues can be performed endoscopically through fiberoptics. Surgical lasers provide thermal scalpels for hemostatic excision of malignant lesions. Photodynamic therapy is applied in the treatment of isolated malignancies persistent after conservative treatment. Surgical laser systems are important tools in the treatment of gynecologic malignancies.