Fig. 6
From: A probabilistic model of bilateral lymphatic spread in head and neck cancer

The joint distribution \(P \left( \mathbf{X}^\text {i}, \mathbf{X}^\text {c} \right)\) over ipsi- and contralateral states and midline extension for late T-category tumors. The distribution is shown as two separate heatmaps for the two binary values of the midline extension variable \(\epsilon\). These matrices are the result of Eq. 14, visualized in Fig. 5.