Front. Surg. Frontiers in Surgery Front. Surg. 2296-875X Frontiers Media S.A. 10.3389/fsurg.2020.00014 Surgery Correction Corrigendum: Quantitative Modulation of PpIX Fluorescence and Improved Glioma Visualization Reinert Michael 1 2 3 4 * Piffaretti Deborah 1 5 Wilzbach Marco 6 Hauger Christian 6 Guckler Roland 6 Marchi Francesco 1 2 D'Angelo Maria Luisa 1 1Laboratory for Biomedical Neurosciences, Neurocenter of Southern Switzerland, Ente Ospedaliero Cantonale, Torricella-Taverne, Switzerland 2Department of Neurosurgery, Neurocenter of Southern Switzerland, Ente Ospedaliero Cantonale, Lugano, Switzerland 3Faculty of Biomedical Neurosciences, Università Della Svizzera Italiana, Lugano, Switzerland 4Medical Faculty, University of Bern, Bern, Switzerland 5Faculty of Medicine, Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland 6Carl Zeiss Meditec AG, Oberkochen, Germany

Edited and reviewed by: Mark Preul, Barrow Neurological Institute (BNI), United States

 *Correspondence: Michael Reinert michael.reinert@eoc.ch

This article was submitted to Neurosurgery, a section of the journal Frontiers in Surgery

 02 04 2020 2020 7 14 12 02 2020 10 03 2020 Copyright © 2020 Reinert, Piffaretti, Wilzbach, Hauger, Guckler, Marchi and D'Angelo. 2020 Reinert, Piffaretti, Wilzbach, Hauger, Guckler, Marchi and D'Angelo

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 A Corrigendum on Quantitative Modulation of PpIX Fluorescence and Improved Glioma Visualization by Reinert, M., Piffaretti, D., Wilzbach, M., Hauger, C., Guckler, R., Marchi, F., et al. (2019). Front. Surg. 6:41. doi: 10.3389/fsurg.2019.00041 GBM—glioblastoma multiforme 5-ALA=5-aminolevulinic acid protoporphyin IX quantification breakdown visualization microscope

In the published article there is an error in Figure 4. In the images the third and fifth column of the first row are the same. The image in the third column of the first row (Genistein 25 μM) has been corrected. The image in the fifth column of the first row (DFO 100 μM + Genistein 25 μM) remains as it is.

PpIX fluorescence accumulation after single and combined treatments. Confocal images showing the increment in PpIX fluorescence (represented in red, excitation 405 nm and emission 635 nm) in GBM cells after single and combined treatment with two or three drugs compared to 5-ALA alone (represented as 0%). Scale bars represent 50 μm. Table summarizes the increment of PpIX fluorescence in percentage. DFO (deferoxamine), SnPP (tin protoporphyrin IX).

The authors apologize for these errors and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.