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).