There are two main types of radiation therapy - external beam radiation therapy and internal radiation therapy (IRT). The cost of external radiation therapy for mouth cancer treatment in India ranges between INR 70,000 (USD 9000) and INR 100000 ( USD 12890). Also known as brachytherapy, internal radiation therapy (IRT) costs around INR ₹ 61,960 (USD 800) to ₹ 5,16,337 ( USD 6,655).