ABSTRACT
23 patients with pulmonary hydatid disease were observed in Chukotka. The patients observed were divided into 2 groups (14 and 9 patients) matched for sex, age, invasion intensity and topography. The patients of the first group were operated after they had been diagnosed, and the patients of the second group were observed without operation. In the both groups, the symptoms of invasion were low expressive, its course was torpid, the complications were rare and the dissemination was not recorded. Two patients observed without operation recovered after the break of the cyst into the bronchus and its evacuation. Relapses of invasion after operation were not recorded in any case. The causes of the good clinical course of pulmonary hydatid disease in the aborigines of Chukotka and the necessity of revising the treatment course are discussed.
