Primary objectives:
* To correlate structural and functional MRI signature with one of three pain phenotypes in head and neck cancer survivors: 1) no pain, 2) central pain, and 3) nociceptive pain.
* To correlate the presence of chronic systemic symptoms with pain phenotype
Exploratory objectives:
\- DNA, RNA, and plasma will be collected for genomic, transcriptomic, and proteomic studies. Results will be vertically integrated along with the results of clinical studies described within this protocol to identify targets for future correlative studies.
