title: Multimodal optical analysis of meningioma and comparison with histopathology.
abstract: Meningioma is the most frequent primary central nervous system tumor. The risk of recurrence and the prognosis are correlated with the extent of the resection that ideally encompasses the infiltrated dura mater and, if required, the infiltrated bone. No device can deliver real-time intraoperative histopathological information on the tumor environment to help the neurosurgeon to achieve a gross total removal. This study assessed the abilities of nonlinear microscopy to provide relevant and real-time data to help resection of meningiomas. Nine human meningioma samples (four World Health Organization Grade I, five Grade II) were analyzed using different optical modalities: spectral analysis and imaging, lifetime measurements, fluorescence lifetime imaging microscopy, fluorescence emitted under one- and two-photon excitation and the second-harmonic generation signal imaging using a multimodal setup. Nonlinear microscopy produced images close to histopathology as a gold standard. The second-harmonic generation signal delineated the collagen background and two-photon fluorescence underlined cell cytoplasm. The matching between fluorescence images and Hematoxylin and Eosin staining was possible in all cases. Grade I meningioma emitted less autofluorescence than Grade II meningioma and Grade II meningioma exhibited a distinct lifetime value. Autofluorescence was correlated with the proliferation rates and seemed to explain the observed differences between Grade I and II meningiomas. This preliminary multimodal study focused on human meningioma samples confirms the potential of tissue autofluorescence analysis and nonlinear microscopy in helping intraoperatively neurosurgeons to reach the actual boundaries of the tumor infiltration. Correspondence between H&E staining (top pictures) and the two-photon fluorescence imaging (bottom pictures).
authors.affiliation: IMNC Laboratory, UMR8165-CNRS, Orsay, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Zanello
authors.affiliation: IMNC Laboratory, UMR8165-CNRS, Orsay, France.
authors.forename: Fanny
authors.initials: F
authors.lastname: Poulon
authors.affiliation: Neuropathology Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: Pascale
authors.initials: P
authors.lastname: Varlet
authors.affiliation: Neuropathology Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: Fabrice
authors.initials: F
authors.lastname: Chretien
authors.affiliation: Neuropathology Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: Felipe
authors.initials: F
authors.lastname: Andreiuolo
authors.affiliation: Neuropathology Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: Mélanie
authors.initials: M
authors.lastname: Pages
authors.affiliation: IMNC Laboratory, UMR8165-CNRS, Orsay, France.
authors.forename: Ali
authors.initials: A
authors.lastname: Ibrahim
authors.affiliation: Neurosurgery Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: Johan
authors.initials: J
authors.lastname: Pallud
authors.affiliation: Neurosurgery Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: Edouard
authors.initials: E
authors.lastname: Dezamis
authors.affiliation: Neurosurgery Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: Georges
authors.initials: G
authors.lastname: Abi-Lahoud
authors.affiliation: Neurosurgery Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: François
authors.initials: F
authors.lastname: Nataf
authors.affiliation: Neurosurgery Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: Baris
authors.initials: B
authors.lastname: Turak
authors.affiliation: Neurosurgery Department, Sainte-Anne Hospital, France.|Paris Descartes University, Paris, France.
authors.forename: Bertrand
authors.initials: B
authors.lastname: Devaux
authors.affiliation: IMNC Laboratory, UMR8165-CNRS, Orsay, France.|University Paris 7-Paris DIDEROT, F-75012, Paris, France.
authors.forename: Darine
authors.initials: D
authors.lastname: Abi Haidar
mesh_terms: D006801:Humans; D008577:Meningeal Neoplasms / Q000000981:diagnostic imaging*; D008579:Meningioma / Q000000981:diagnostic imaging*; D018613:Microscopy, Confocal; D064847:Multimodal Imaging; D060787:Neoplasm Grading; D061848:Optical Imaging; D011379:Prognosis
keywords: Fluorescence; fluorescence lifetime; histology; meningioma; multiphoton microscopy; spectroscopy