Along with the increase in the number of new cases, there is a large percentage of echinococcosis relapses, the frequency of which, according to various authors, varies widely from 3.3 to 54%, due to the existing terminology confusion. Material and methods of research. In the period from 2005 to 2019, 53 patients with recurrent echinococcosis of the lungs were operated on in the surgical Department of the 1st Sammi clinic. Research result. Immediate complications after surgery were observed in 6 (11.3%) patients. Postoperative mortality was observed in 1 (1.9%) case. The cause of death was acute cardiovascular failure. Conclusions. Analysis of the morphological characteristics of echinococcal cysts of the lungs showed that recurrent echinococcosis was most often found in echinococcus veterinorum (50.9%), echinococcus hominis (37.7%), and in echinococcus acephalocystis, there were no relapses of the disease, and if there were (6 – 11.3%), we associate this with reinvasia of the parasite.
