ABSTRACT
Osseous hydatid disease is caused by larval stage of Ecchinococcus granulosa and is common in sheep and cattle farming areas. The man is accidental intermediate host. Common sites are liver and lung. Bone involvement is rarely seen. Bonly lesion commonly presents al age of 30 to 60 years. Common sites are vertebral column, pelvis, femur and skull. Joint involvement without bony focus is exceedingly rare. Preoperative diagnosis of bony lesion is very difficult, and high index of suspicion along with plain radiography and immunological test are major tools for diagnosis. Computerized tomography [CT] and Magnetic Resonance Imaging [MRI] are helpful in determining the extent of bony and soft tissue lesions. The treatment is combination of surgery and chemotherapy. Recurrences are common. This report presents case histories of two patients dealt at this institute