Fig. 1
From: A probabilistic model of bilateral lymphatic spread in head and neck cancer

Contralateral involvement stratified by T-category (top left panel), the number of metastatic LNLs ipsilaterally (top right panel), and whether the primary tumor extended over the mid-sagittal plane or was clearly lateralized (bottom left panel). In the bottom right panel, we consider lateralized tumors only, and compare the contralateral involvement prevalence for selected scenarios that vary in their T-category and ipsilateral involvement extent.