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Unique pathological findings of astroblastoma with MN1 alteration in a patient with late recurrence

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Abstract

Astroblastoma is an extremely rare brain tumor that has recently attracted attention owing to its association with MN1 gene alteration. However, its long-term clinical course remains unclear. We report a late recurrence of MN1-altered astroblastoma with unique pathological findings. A 24-year-old woman presented with seizures due to a left frontal lobe tumor. Gross total resection (GTR) was achieved, and the diagnosis was MN1-altered astroblastoma, which presented cell wrapping, i.e., presence of tumor cells enveloping one another. She received local radiotherapy (50 Gy). However, the tumor recurred after 12 years, and its size increased rapidly. The second surgery achieved GTR and confirmed increasing anaplasia. The patient was tumor-free for 1 year without any neurological deficits. This case implies the importance of long-term follow-up of MN1-altered astroblastoma. The pathological significance of cell wrapping in this case is unclear, but it may be associated with MN1-altered astroblastoma and should be noted in future cases.

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Acknowledgements

The authors would like to thank Enago (www.enago.jp) for the English language review.

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Authors and Affiliations

  1. Department of Neuro-Oncology/Neurosurgery, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka, Saitama, 350-1298, Japan

    Masaki Ujihara, Kazuhiko Mishima, Jun-Ichi Adach, Mitsuaki Shirahata, Tomonari Suzuki & Ryo Nishikawa

  2. Department of Pathology, Saitama Medical University, Saitama, Japan

    Atsushi Sasaki

  3. Department of Human Pathology, Gunma University Graduate School of Medicine, Maebashi, Japan

    Sumihito Nobusawa

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  1. Masaki Ujihara
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  2. Kazuhiko Mishima
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  5. Mitsuaki Shirahata
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  7. Sumihito Nobusawa
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Correspondence to Masaki Ujihara.

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Ujihara, M., Mishima, K., Sasaki, A. et al. Unique pathological findings of astroblastoma with MN1 alteration in a patient with late recurrence. Brain Tumor Pathol 38, 243–249 (2021). https://doi.org/10.1007/s10014-021-00401-6

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  • DOI: https://doi.org/10.1007/s10014-021-00401-6

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