passages.id: split_5_test_3018_passage
passages.type: progene_text
passages.text: Patients with head and neck squamous cell carcinoma ( HNSCC ) are biased toward the Th2 phenotype as they have increased levels of the Th2 cytokines IL-4 , IL-6 and IL-10 and diminished levels of the Th1 cytokine IFN-gamma .