malignant neoplasm of ethmoid sinus TNM staging regional lymph nodes (N) N2c
malignant neoplasm of ethmoid sinus tnm staging regional lymph nodes (n) n2c
malignant tumor of ethmoid sinus TNM staging regional lymph nodes (N) N2c
malignant tumor of ethmoid sinus tnm staging regional lymph nodes (n) n2c