Thank you for the query.
or radiotherapy is advisable depending of the clinical stage of the cancer. Only in stage I and II (not every case) chemotherapy is not necessary. All others stages needs chemotherapy. You need to know that chemotherapy is used for eliminating all micrometastasis
. Even one cancer cell
left can cause further spreading of the cancer. Such small metastasis are invisible for MRI
so this test can be decisive for chemotherapy. Such test which can tell about left metastases is PET test, however still it can not show single cancer cells.
Hope this will help.