To Evaluate the Efficacy and Feasibility of Modified Reduce-volume Target IMRT in the Treatment of Patients With Non-metastatic NPC

A Retrospective Real-world Study in Patients With Nasopharyngeal Carcinoma: to Evaluate the Efficacy and Feasibility of Modified Reduce-volume Target IMRT in the Treatment of Patients With Non-metastatic NPC

This is a retrospective real-world study to evaluate the efficacy and feasibility of modified reduce-volume target IMRT in the treatment of patients with non-metastatic NPC

Inclusion Criteria:

1. Pathologic diagnosis (pathologically confirmed by nasopharyngeal biopsy) was nasopharyngeal carcinoma;
2. Newly diagnosed, non-metastatic and treated with modified reduce-volume IMRT;
3. Patients with baseline MRI date of nasopharynx and neck, and completed the first course of treatment in our hospital;
4. Diagnosis time: November 1, 2014 to December 31 , 2017

Exclusion Criteria:

1. Disease progression during IMRT;
2. Previous malignancy or other concomitant malignant diseases;
3. The evaluation information of tumor efficacy can not be obtained;
4. Receive blind treatment in other clinical research.