(A) Right ankle, seen from an anterior perspective. Number 1 denotes the anteromedial portal (i.e. inflow portal), and number 2 the anterolateral portal (i.e., outflow portal). (B) Right ankle, seen from an anterolateral perspective, Number 2 denotes the anterolateral portal (i.e., outflow portal). (ML, lateral malleolus; MM, medial malleolus; N, superficial peroneal nerve; TibA, tendon of the tibialis anterior muscle.)