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Lymphoplasmacyte-rich meningioma with hematologic signs and PD-L1 over-expression.

Gabriele GaggeroMichela CamporaDavide TaiettiGiannamaria CerrutiEnrico Lo BueMonica TruffelliMarco CeraudoPietro Fiaschi
Published in: Autopsy & case reports (2022)
Lymphoplasmacyte-rich meningioma (LPRM) is one of the rarest variants of grade I meningiomas. It can be clinically associated with prominent peripheral blood abnormalities, anemia, and/or various gammopathy, which usually disappear after surgical removal of the tumor. We document a case of right frontal LPRM in a 72-year-old male who presented general cognitive decadence. The patient suffered from mild anemia. The LPRM is a rare variant of meningioma, with only a few cases globally reported in the literature. It has been categorized as a grade I tumor in the 2021 World Health Organization (WHO) classification central nervous system. Due to the rarity, this meningioma variant origin and biological behavior are still not clear. Immunohistochemistry profile showed prominent PD-L1 expression, leading to additional interrogation on LPRM immunomorphological characteristics, the significance of the inflammatory tumoral microenvironment and its correlation with the immune-checkpoints.
Keyphrases
  • optic nerve
  • peripheral blood
  • chronic kidney disease
  • poor prognosis
  • systematic review
  • machine learning
  • stem cells
  • deep learning
  • copy number
  • working memory
  • functional connectivity
  • dna methylation