A Case of Recurrent Thymoma Which Was Accurately Diagnosed Using MRI-DWI (Diffusion Weighted Imaging)

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  • Toba Hiroaki
    Department of Oncological and Regenerative Surgery, the University of Tokushima Graduate School
  • Kondo Kazuya
    Department of Adult and Gerontological Nursing, the University of Tokushima Graduate School
  • Takizawa Hiromitsu
    Department of Oncological and Regenerative Surgery, the University of Tokushima Graduate School
  • Kenzaki Koichiro
    Department of Oncological and Regenerative Surgery, the University of Tokushima Graduate School
  • Sakiyama Shoji
    Department of Oncological and Regenerative Surgery, the University of Tokushima Graduate School
  • Tangoku Akira
    Department of Oncological and Regenerative Surgery, the University of Tokushima Graduate School

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Other Title
  • ＭＲＩ拡散強調像が診断に有用であった再発胸腺腫の１例

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Description

Background. Recent technological advances in MRI-DWI now allow it to be applied to the whole body. A patient with a recurrent thymoma was accurately diagnosed using MRI-DWI. Case. A 30-year-old woman was given a diagnosis of thymoma (Masaoka's stage IVa) with myasthenia gravis (type IIb) and received induction chemotherapy and underwent an operation. She also received chemoradiation therapy postoperatively. Three years and 9 months later, an intrathoracic recurrence appeared and the lesion was resected. Five years and 9 months after the initial operation, FDG-PET/CT revealed accumulation of FDG in the para-aortic lesion and the posterior side of the right XIth intercostal space. In contrast, MRI-DWI revealed a high intensity of these lesions and 5 other small lesions in the right thoracic cavity, which showed no FDG accumulation in FDG-PET/CT. The lesions were completely resected and all 7 lesions were confirmed to be recurrent thymoma. Conclusion. Small recurrent thymomas could be successfully detected using MRI-DWI, but not FDG-PET/CT. MRI-DWI was therefore considered to be a useful tool for detecting disseminated lesions of thymoma in this case.<br>

Journal

  • Haigan

    Haigan 48 (6), 700-703, 2008

    The Japan Lung Cancer Society

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