χ2 : Chi square test FE= Fisher Exact test
P: p value for association between EGFR expression in cervical lymph node metastasis with primary lesion cartilage invasion, muscle invasion and lymphovascular invasion.
Table (3): show the relation between EGFR expression in cervical lymph node metastasis and laryngeal primary mass immunohistochemical EGFR analysis (n = 20).