For citations:
Drozdov E.S., Grishchenko M.Yu., Kharitonkin V.I., Lyan N.I., Borodin O.Yu., Fesik E.A., Korotkevich A.G. A rare clinical case of a patient with mixed neuroendocrine-non-neuroendocrine neoplasms of the ampulla of vater. Siberian journal of oncology. 2023;22(2):168-174. (In Russ.) https://doi.org/10.21294/1814-4861-2023-22-2-168-174