system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
What is the most common cause of failure of radiotherapy for stage II cervical carcinoma?
assistant
The correct answer is  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.