Fig. 1: 4-point scale used to grade iENE. | British Journal of Cancer

Fig. 1: 4-point scale used to grade iENE.

From: Correlation between imaging-detected and pathological extranodal extension in a randomised trial in Human Papillomavirus-positive oropharyngeal cancer

Fig. 1

a Grade 0 iENE: Axial T2 MRI. Well-defined metastatic Level II node, clear perinodal fat (arrow). b Grade 1 iENE: Sagittal CECT. Metastatic Level II node with an irregular nodal margin + perinodal fat stranding (arrow). c Grade 2 iENE: Coronal T2 MRI + sagittal CECT demonstrating coalescence of metastatic Level II + III nodes (arrow). d Grade 3 iENE: Axial T1FS+c MRI demonstrating definite invasion of a metastatic Level II node into adjacent structures. Note the direct infiltration of sternocleidomastoid muscle (arrow)

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