Peritonitis is defined as inflammation of the peritoneum. The inflammatory response involves vasodilation, exudation of protein-rich fluid, cellular infiltration, pain and, chronically, formation of fibrous adhesion. The disease can be classified into primary and secondary cases.
It begins in the venous plexus along the medial side of the foot, and it runs up the medial side of the leg and knee, alongside the saphenous nerve. In the thigh, the long saphenous vein continues up the medial surface, accompanying the medial femoral cutaneous nerve.
They join the posterior tibial veins in the upper calf. TIBIAL/PERONEAL TRUNK This short vein segment is located in the upper calf, where the posterior tibial and peroneal veins join. POPLITEAL (POP) The popliteal vein begins as the anterior tibial vein joins the tibial/peroneal trunk in the upper calf.