HSPA5 and oropharyngeal carcinoma: To further clarify the relationship between EGFR and GRP78 expression and the prognosis of patients with oropharyngeal carcinoma, we divided the patients into four groups: EGFR (-) GRP78 (-), EGFR (+) GRP78 (-), EGFR (-) GRP78 (+) and EGFR (+) GRP78 (+).