Ramin Farzam - Dept. of Orthopedics, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
Mohammad Abdi - Dept. of Critical Care Nursing, School of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran
Maryam Farhangi - Mahak s’ Pediatric Cancer Treatment and Research Center, Mahak Hospital, Tehran, Iran
Mohammad Zibaei - Dept. of Parasitology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
Hojjat Torkmandi - Dept. of Operating Room, School of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran

Hydatid cysts can be caused by Echinococcus species in various tissues. Skeletal cystic lesions are very rare and may be neglected. Here, we report a case of pathologic fracture following primary hydatid cystic lesions in the proximal and femoral shaft bone. A ۶۲-year-old man suffered a sudden fracture followed by swelling of the thigh. Intramedullary femoral fixation was made and during the surgery, numerous cystic lesions of the hydatid cysts were observed. After  the surgery ultrasound and CT-Scans of the abdomen, lung, spine, and brain did not confirm any sign of mass or cyst elsewhere. The patient was followed up for one year. During this period, the union was not yet completely established and the patient was stillreceiving treatment. Orthopedic surgeons need to be aware of this parasitic complication in bones and joints and provide the best outcome for the patients with proper treatment. Surgery along with albendazole and/or mebendazole  therapy remains the treatment of choice. For this purpose, it is recommended that attention be paid to long-term follow-up in continuous professional development courses.

Hydatid cyst, Femoral bone, Fracture, Pathological fracture, Clinical education