Chemoradiotherapy (CRT, CRTx) is the combination of chemotherapy and radiotherapy to treat cancer. Synonyms include radiochemotherapy (RCTx, RT-CT) and chemoradiation.
Chemoradiation can be concurrent (together) or sequential (one after the other).
The chemotherapy component can be or include a radiosensitizing agent.
Chemoradiotherapy as neoadjuvant therapy before surgery has been shown to be effective in various cancers.
References
Chemoradiotherapy Wikipedia(Text) CC BY-SA