Abstract
Meningiomas occasionally display aggressive behavior, but the mechanisms of malignant transformation remain unclear. We encountered the case of a 65-year-old man with a 10-year history of recurrent meningioma. The patient had undergone multiple tumor resections, radiotherapy treatments, and reconstructive surgeries due to wound infection. After the third resection of the tumor and reconstruction with an omental flap, the tumor demonstrated rapid growth and lung metastasis. The final pathological diagnosis was anaplastic meningioma. Because the drastic change of the tumor was observed after omental flap transposition, we investigated the effect of the omentum on tumor cells and performed histopathological analyses of meningiomas using a mouse model. We found that meningioma cells have a high affinity to the omentum and show a growth advantage when co-cultured with adipocytes. Immunohistochemical staining revealed that meningioma cells adjacent to the omentum strongly expressed fatty acid-binding protein 4, a lipid transfer protein, in both mouse and human. Our results suggest that tumor cells can receive lipid supply from omental adipocytes, and the surrounding tissues may induce tumor progression. We conclude that although omental tissue is an ideal material for reconstruction surgery, close follow-up is recommended in meningioma patients when used for cranioplasty.
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Acknowledgments
The authors would like to thank the members of the Division of Experimental Animals and the Department of Pathology (Nagoya University) and Akira Kato for histology assistance and mouse maintenance. This work was supported by Grant-in-Aid for Young Scientists (B) (21790398) to Hiroyuki Momota, by Grant-in-Aid for Scientific Research (B) (21390408) to Atsushi Natsume, and by Grant-in-Aid for Scientific Research (C) (21591867) to Masazumi Fujii from the Japan Society for the Promotion of Science.
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The authors report no conflict of interest concerning the materials or methods used in this study or the findings specified in this paper.
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Iwami, K., Momota, H., Fujii, M. et al. Anaplastic meningioma with rapid growth after omental flap transposition: a case report and experimental study. Brain Tumor Pathol 32, 137–144 (2015). https://doi.org/10.1007/s10014-014-0190-4
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DOI: https://doi.org/10.1007/s10014-014-0190-4