Fig. 9
From: A probabilistic model of bilateral lymphatic spread in head and neck cancer

Comparison of the computed and observed prevalences for scenarios that illustrate the model’s capability of accounting for the correlation between ipsi- and contralateral involvement. We show three scenarios where we consider the joint involvement of contralateral LNL II together with different ipsilateral involvements: (1) the ipsilateral neck shows no involvement in green (LNLs I to V are healthy, LNL VII is unspecified because data on it is missing for some patients), (2) where ipsilateral LNL II is involved in orange (LNLs I, III, IV, and V are healthy), and (3) where ipsilateral LNLs II and III are involved in red (LNLs I, IV, and V are healthy). These three scenarios are plotted for all combinations of T-category (early in top row, advanced in bottom row) and tumor lateralization (lateralized in left column, extending over mid-sagittal plane in the right column).