<prompt> Answer this question truthfullyFor what purpose is medical therapy employed in the management of anal cancer?  <response>: <reason> Minimal invasive methods such as infrared coagulation is indicated for localized anal cancer. Chemotherapy and radiation are the first-line therapy for metastatic disease. Localized anal cancer is treated with minimal invasive treatment as infrared coagulation.Metastatic anal cancer is treated with chemotherapy fluorouracil 5-FU and cisplatin concurrent with radiation. 