What is the most common cause of failure of radiotherapy for stage II cervical carcinoma?: (A) Liver metastasis, (B) Bone metastasis, (C) Para-aortic node metastasis, (D) Resistance of the central tumor
Answer is C. In stage II cervical cancer, the incidence of nodal involvement is 25%-40%. Most tumors are not radioresistant, and distant metastasis (i.e., a more advanced stage) are a late complication of more advanced stages of the disease.