Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector7186210.17816/kazmj71862Research ArticlePerforation of "simple" ulcers of the small intestineMorozovV. G.info@eco-vector.com1502196142175772106202121062021Copyright © 2021, Morozov V.G.2021<p>Nonspecific ulcers of the small intestine are rare and very serious diseases.</p>Kazan Medical archiveКазанский медицинский архив