Recurrent Hydatosis at the Site of Non-union Humerus Fracture

Hydatid disease is still endemic in several regions of the world and iscaused by two species of tapeworms, echinococcus granulosus andechinococcus alveolaris. it primary involves liver and lung, and boneinvolvement is relatively rare (0.2–4%), where it is most commonlyseen in the spine. the skeletal involvement is usually due to secondaryextension such as hematogenous spread. the disease has usually a silentmanifestation until a complication exists; so, many cases are diagnosedintraoperatively. treatment of hydatid disease because of its boneinvolvement and spillage of fluid with subsequent contamination seedingis difficult, so it has a high mortality rate and many cases will recur.therefore, we can prevent these occurrences if we treat hydatid diseasecompletely and in the primary stage. adjuvant medical treatment, if thediagnosis is known, prevents systemic spread and recurrence. here, wepresent a primary recurrent hydatosis at the site of non-union humerusfracture. we have pointed out osseous hydatosis as one of the importantdifferential diagnoses in destructive bone lesions and the necessity of itsradical resection.