Role of Gold-198 in Arresting the Growth of Cancer

The radioisotope of gold (Gold-198, ¹⁹⁸Au) has a Half Life of 2.7 days and its radiations are beta particles (b-particles) and gamma rays (g-rays). In the form of colloidal suspension ¹⁹⁸Au is used as the cancer therapy. The most common use of ¹⁹⁸Au is in the treatment of ascites (accumulation of fluid in the peritoneal cavity) and pleural effusion due to metastasis of cancer in the serous surface of cavities. Only the medical practitioners associated with nuclear medicine, administer such therapy. The dose for the treatment of pleural effusion is 25 - 75 mCi and for the treatment of ascites, the dose is 50 - 150 mCi. The patient needs to be hospitalized for the first few days during the course of treatment with the radioisotope.