[Hydatidosis of the humerus complicated with fracture, bacterial infection, fistula, and extraosseous localization].

The clinical case of an apparently healthy 63-year-old man from a rural area, with previous contact with dogs, who had a pathological fracture of the right humerus is presented. Initially he presented slight local pain, and functional discapacity. Eight months later, after a radiological study and surgery (curettage), diagnosis of hydatid disease was made. Later on, after receiving two courses with albendazole, the parent continued in similar conditions for seven years, when his situation became complicated with bacterial, fistula and extraoseous hydatidosis. The humerus was resected and a segmentary prothesis was successfully set.