Teacher:Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.
Teacher: Now, understand the problem? Solve this instance: Question: Does incidental mediastinal dose explain low mediastinal node recurrence rates in patients with early-stage NSCLC treated with stereotactic body radiotherapy?
Answer: Low mediastinal recurrence rates in stage I NSCLC treated with SBRT validates the omission of staging mediastinoscopy. The low incidental dose to MLNSs does not seem to explain the low mediastinal recurrence in the majority of patients. Our findings also confirm that prophylactic radiation to the mediastinum is not necessary and support the hypothesis that local ablation of the primary lesion could indirectly affect subclinical nodal disease through unknown mechanisms.
Student:
no