“…Bone contamination is mainly hematogenous [11] , but a secondary bone invasion from primary soft tissue involvement is possible. Hydatid osteopathy is infiltrative, diffuse, slow, and progressive with numerous microvesicles without encystation of the parasite [2 , 12] . The importance of spongy tissues in the pelvis constitutes favorable ground for the spread of hydatid lesions [4] .…”