{
  "abstract": "A 52-year-old man with Bence Jones protein λ-type multiple myeloma developed a large sacral bone-associated, paraskeletal mass. After radiotherapy and idecabtagene vicleucel, serum and urine immunofixation tests were negative, marrow minimal residual disease assessment was negative, and post-treatment 11C-methionine positron emission tomography/computed tomography showed no abnormal uptake in the residual lesion, although computed tomography showed a persistent mass. A re-biopsy was not clinically justified in this case. A re-evaluation of the diagnostic tissue revealed plasma cell-rich areas and acellular collagen-rich stroma with extracellular matrix-associated proteins and λ light chain-derived peptides. Observation was selected, and the mass gradually decreased without any clinical relapse.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 16,
  "authors": [
    {
      "name": "Seiji Kakiuchi"
    },
    {
      "name": "Chiharu Mishima"
    },
    {
      "name": "Kanae Yamakawa"
    },
    {
      "name": "Naru Tomigaki"
    },
    {
      "name": "Akimasa Sakamoto"
    },
    {
      "name": "Shutaro Fujioka"
    },
    {
      "name": "Isamu Harima"
    },
    {
      "name": "Hiroaki Akiyama"
    },
    {
      "name": "Ryotaro Niwa"
    },
    {
      "name": "Ikumi Takagi"
    },
    {
      "name": "Yoko Kozuki"
    },
    {
      "name": "Yoshiharu Miyata"
    },
    {
      "name": "Nobuko Iwata"
    },
    {
      "name": "Kyoko Yoshihara"
    },
    {
      "name": "Satoshi Yoshihara"
    },
    {
      "name": "Kyoko Otani"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/23gmgvcdfyes3.bib",
  "cited_by": 0,
  "doi": "10.2169/internalmedicine.7907-26",
  "fulltext_url": "https://www.jstage.jst.go.jp/article/internalmedicine/advpub/0/advpub_7907-26/_article",
  "id": "23gmgvcdfyes3",
  "issns": [
    "1349-7235",
    "0918-2918"
  ],
  "landing_url": "https://www.jstage.jst.go.jp/article/internalmedicine/advpub/0/advpub_7907-26/_article",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "jstage-journal",
      "medicine/general"
    ],
    [
      "openalex",
      "2720|Multiple Myeloma Research and Treatments"
    ]
  ],
  "openalex": "W7203670634",
  "pdf_url": "https://www.jstage.jst.go.jp/article/internalmedicine/advpub/0/advpub_7907-26/_pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/23gmgvcdfyes3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:31Z",
      "native_id": "10.2169/internalmedicine.7907-26",
      "source": "jstage",
      "url": "https://www.jstage.jst.go.jp/article/internalmedicine/advpub/0/advpub_7907-26/_article"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2720|Multiple Myeloma Research and Treatments",
      "subfield": "general"
    }
  ],
  "title": "Diagnostic Tissue Re-Evaluation Supporting the Observation of a ¹¹C-Methionine PET-Negative Residual Paraskeletal Mass in Multiple Myeloma",
  "title_text": "Diagnostic Tissue Re-Evaluation Supporting the Observation of a ¹¹C-Methionine PET-Negative Residual Paraskeletal Mass in Multiple Myeloma",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:31Z",
  "url": "https://research.draconitic.com/paper/23gmgvcdfyes3",
  "venue": "Internal Medicine",
  "versions": []
}