FIELD: medicine; oncology. SUBSTANCE: ultrasound instrument sensor is positioned in region of right-hand hypochondrium in oblique-longitudinal projection relative to patient's body. Conventional dial is projected on pancreas head picture obtained. If variations are detected in sector from 3 to 6 h, tumor of large duodenal papilla is diagnosed. In sector from 6 to 12 h tumor of dial common bile duct is diagnosed. In sector of 9-12-5 h or in case variations occupying the entire dial are detected, tumor of pancreas head is diagnosed. EFFECT: provision for differential diagnostics of tumors. 3 dwg, 3 expj
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