{
  "abstract": "INTRODUCTION: Portal annular pancreas (PAP) is a rare congenital anomaly in which the uncinate process encircles the portal vein (PV) or superior mesenteric vein (SMV) and fuses with the dorsal aspect of the pancreatic body. We herein report a case of ampullary carcinoma associated with PAP treated by subtotal stomach-preserving pancreaticoduodenectomy.\n\nCASE PRESENTATION: A 51-year-old woman presented with scleral icterus and watery diarrhea. Following a detailed examination, she was diagnosed with carcinoma of the ampulla of Vater and underwent surgical treatment. During pancreatic resection, 2 pancreatic cut surfaces were identified on the ventral and dorsal sides of the SMV, leading to the intraoperative diagnosis of PAP. A lifted jejunal limb was rotated in a spiral fashion, and pancreaticojejunostomy was performed for each pancreatic stump. The postoperative course was uneventful, with no evidence of postoperative pancreatic fistula, and the patient was discharged in good condition.\n\nCONCLUSIONS: Although PAP is a rare anatomical anomaly, it requires careful attention during surgical procedures and reconstruction; therefore, it should be recognized preoperatively whenever possible. The reconstruction method employed in the present case may be useful as a reconstructive option for PAP because it avoids excessive pancreatic resection. We report this case with a review of the relevant literature.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Surgery, Nagoya Tokushukai General Hospital, Kasugai, Aichi, Japan",
    "Department of Surgery, Shizuoka Tokushukai, General Hospital, Shizuoka, Shizuoka, Japan"
  ],
  "article_type": "case report",
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Hiroto Suzuki"
    },
    {
      "affs": [
        0
      ],
      "name": "Ken Ishikawa"
    },
    {
      "affs": [
        1
      ],
      "name": "Takuya Bamba"
    },
    {
      "affs": [
        0
      ],
      "name": "Masataka Nakano"
    },
    {
      "affs": [
        0
      ],
      "name": "Yuki Inagaki"
    },
    {
      "affs": [
        0
      ],
      "name": "Kentaro Hamada"
    },
    {
      "affs": [
        0
      ],
      "name": "Sizuka Shoji"
    },
    {
      "affs": [
        1
      ],
      "name": "Mitsuo Mori"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b7yp2gktp3e8z.bib",
  "cited_by": 0,
  "doi": "10.70352/scrj.cr.26-0511",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13730793/",
  "id": "b7yp2gktp3e8z",
  "issns": [
    "2198-7793"
  ],
  "landing_url": "https://doi.org/10.70352/scrj.cr.26-0511",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Case Report"
    ],
    [
      "openalex",
      "2730|Pancreatic and Hepatic Oncology Research"
    ]
  ],
  "openalex": "W7224812237",
  "pdf_url": "https://www.jstage.jst.go.jp/article/scrj/12/1/12_cr.26-0511/_pdf",
  "pmcid": "PMC13730793",
  "pmid": "42979414",
  "published": "2026-10-31",
  "publisher": "Japan Surgical Society",
  "ris": "https://research.draconitic.com/paper/b7yp2gktp3e8z.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T12:23:17Z",
      "native_id": "PMC13730793",
      "source": "pmc",
      "url": "https://doi.org/10.70352/scrj.cr.26-0511"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2730|Pancreatic and Hepatic Oncology Research",
      "subfield": "oncology"
    }
  ],
  "title": "Spiral Jejunal Reconstruction of Both Pancreatic Stumps in Type II Portal Annular Pancreas during Pancreaticoduodenectomy: A Case Report",
  "title_text": "Spiral Jejunal Reconstruction of Both Pancreatic Stumps in Type II Portal Annular Pancreas during Pancreaticoduodenectomy: A Case Report",
  "type": "peer-reviewed",
  "updated_at": "2026-11-07T12:23:17Z",
  "url": "https://research.draconitic.com/paper/b7yp2gktp3e8z",
  "venue": "Surgical Case Reports",
  "versions": []
}