Department of Surgical Oncology;
Ilyinskaya Hospital;
Moscow 143421;
Russia;
V.I.Kulakov Research Center for Obstetrics;
Ministry Hlth Russian Federat;
VI Kulakov Res Ctr Obstet Gynecol&Perinatol;
Moscow 119526;
Russia;
Department of Pathology;
Buranazian Federal Medical and Biological Center of the Federal Medical and Biological Agency of Russian Federation;
Moscow 143421;
Russia;
Department of HPB Surgery;
Moscow Clinical Research Center;
Moscow 111123;
Russia;
Department of Radiology;
Vishnevsky Institute of Surgery;
Ilyinskaya Hospital;
Moscow 143421;
Russia;
Department of Pathology;
Bakhrushin Brothers Moscow City Hospital;
Moscow 107076;
Russia;
Department of Pathology;
Vishnevsky Institute of Surgery;
Ilyinskaya Hospital;
Moscow 117997;
Russia;
Groove pancreatitis; Cystic dystrophy of the duodenal wall; Pancreaspreserving duodenectomy; Pancreas-preserving duodenal resection; Chronic pancreatitis; Pancreatoduodenectomy;