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The efficacy of mpMRI in diagnosing and predicting prognosis of soft tissue sarcoma confirmed by 5th edition of the WHO Classification

Research Project

Project/Area Number 22K15802
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionGifu University

Principal Investigator

Kawaguchi Masaya  岐阜大学, 大学院医学系研究科, 招へい教員 (20772114)

Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2024: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2023: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords軟部肉腫 / 脂肪肉腫 / MRI / WHO分類第5版
Outline of Research at the Start

軟部肉腫の診療は、診断、治療選択、治療が速やかに行われることが重要である。近年、軟部肉腫を対象とした病理診断や化学療法の研究が盛んである。2020年の骨軟部腫瘍・WHO分類第5版では軟部肉腫の診断に免疫染色や遺伝子診断が必須となり、細分化されている。一方で軟部肉腫の画像研究は2010年以前に発表されたものが多く、これらの病理診断は2002年のWHO分類第3版に基づいており、内容が現状にそぐわない。そこで本研究は当院で診断された軟部肉腫をWHO分類第5版に基づいて病理診断を再検討し、診断および治療選択に有用な画像所見をmultiparametric MRI(mpMRI)を用いて検討する。

Outline of Final Research Achievements

Three studies were conducted on fatty tumors and soft tissue sarcomas as follows. Fatty tumors with fat necrosis are difficult to distinguish from atypical lipomatous tumors due to the septa. We reviewed CT and MRI findings of lipomas and atypical lipomatous tumors pathologically confirmed with fat necrosis. On images, fat necrosis was characterized by the presence of a ring-shaped fatty septum. Myxoid liposarcoma is sometimes difficult to distinguish from myxofibrosarcoma or dedifferentiated liposarcoma, and the presence of linear/septal fat and high signal on T2-weighted MRI images are helpful in the diagnosis.
We evaluated MRI findings differentiating myxofibrosarcoma from undifferentiated pleomorphic sarcoma. Undifferentiated pleomorphic sarcoma was characterized by low signal on T2-weighted images, low ADC value, and high SUVmax.

Academic Significance and Societal Importance of the Research Achievements

軟部肉腫の病理診断は免疫組織診断、遺伝子診断に伴って年々細分化されている。症例数の少なさや病理診断の複雑性のため、軟部肉腫の画像診断は遅れているのが実状である。今回の研究により、WHO分類第5版により診断した脱分化型脂肪肉腫、粘液型脂肪肉腫、粘液線維肉腫、未分化多形肉腫の画像所見の検討をおこなった。病理診断の進歩にともなって、画像診断も発展することで、組織型の推定のみではなく、治療法の選択、予後の推定に有用な画像所見の研究が期待される。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (10 results)

All 2025 2024 2023 2022

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (6 results)

  • [Journal Article] Radiologic-histopathologic correlation of fatty island sign with fat necrosis in atypical lipomatous tumor and lipoma2024

    • Author(s)
      Masaya Kawaguchi, Hiroki Kato, Kazuhiro Kobayashi, Tatsuhiko Miyazaki, Akihito Nagano, Yoshifumi Noda, Fuminori Hyodo, Masayuki Matsuo
    • Journal Title

      Clinical Radiology

      Volume: 79 Issue: 6 Pages: 446-452

    • DOI

      10.1016/j.crad.2024.02.009

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] MRI features of subcutaneous anterior knee mass associated with a focal defect of the patellar retinaculum2023

    • Author(s)
      Masaya Kawaguchi, Hiroki Kato, Kazuhiro Kobayashi, Tatsuhiko Miyazaki, Akihito Nagano, Masayuki Matsuo
    • Journal Title

      Skeletal Radiology

      Volume: 52 Issue: 4 Pages: 743-749

    • DOI

      10.1007/s00256-022-04224-0

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Differences in MRI findings of superficial spindle cell lipoma and atypical lipomatous tumor/well-differentiated liposarcoma2023

    • Author(s)
      Masaya Kawaguchi, Hiroki Kato, Kazuhiro Kobayashi, Tatsuhiko Miyazaki, Akihito Nagano, Yoshifumi Noda, Fuminori Hyodo, Masayuki Matsuo
    • Journal Title

      Br J Radiol

      Volume: 96 Issue: 1143 Pages: 20220743-20220743

    • DOI

      10.1259/bjr.20220743

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] MRI findings to differentiate musculoskeletal dedifferentiated liposarcoma from atypical lipomatous tumor2022

    • Author(s)
      Masaya Kawaguchi, Hiroki Kato, Kazuhiro Kobayashi, Tatsuhiko Miyazaki, Akihito Nagano, Yoshifumi Noda, Fuminori Hyodo, Masayuki Matsuo
    • Journal Title

      Radiol Med

      Volume: 127 Issue: 12 Pages: 1383-1389

    • DOI

      10.1007/s11547-022-01547-9

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Steatocystoma multiplex (simplex) のCT、MRI所見の検討2025

    • Author(s)
      川口真矢, 加藤博基, 松尾政之
    • Organizer
      第35回 骨軟部放射線研究会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 表在性の紡錘形脂肪腫と異型脂肪腫様腫瘍のMRI所見の比較検討2024

    • Author(s)
      川口 真矢, 加藤 博基, 永野昭仁, 松尾 政之
    • Organizer
      第57回日本整形外科学会骨・軟部腫瘍学術集会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 孤立性線維性腫瘍とデスモイド腫瘍の鑑別に有用なMRI画像所見の検討2024

    • Author(s)
      加賀 徹郎, 加藤 博基, 川口 真矢, 野田 佳史, 兵頭 文紀, 松尾 政之
    • Organizer
      第60回日本医学放射線学会秋季臨床大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 表在性に発生した紡錘形脂肪腫と異型脂肪腫様腫瘍のMRI所見の比較検討2024

    • Author(s)
      川口 真矢, 加藤 博基, 松尾 政之
    • Organizer
      第60回日本医学放射線学会秋季臨床大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 膝蓋支帯の欠損部を介して皮下にヘルニアを生じた膝蓋下脂肪体病変のMRI所見の検討2024

    • Author(s)
      川口真矢, 加藤博基, 松尾政之
    • Organizer
      第34回骨軟部放射線研究会
    • Related Report
      2023 Research-status Report
  • [Presentation] 脱分化型脂肪肉腫と非定型脂肪腫性腫瘍のMRI所見の比較検討2023

    • Author(s)
      川口 真矢, 加藤 博基, 松尾 政之
    • Organizer
      第59回日本医学放射線学会秋季臨床大会
    • Related Report
      2023 Research-status Report

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Published: 2022-04-19   Modified: 2026-01-16  

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