Hydatid disease is a parasitic infestation caused by Echinococcus granulosus. Echinococcosis occurs worldwide and can affect multiple organs. Majority of the intracranial cysts are secondary and solitary. https://www.roneverhart.com/Ryukyu-Kobujutsu-Buki-Jutsu-Vol-2-DVD-with-Kiyoshi-Yogi/