title: 5-Aminolaevulinic Acid-Induced Fluorescence in Primary Central Nervous System Lymphoma.
abstract: OBJECTIVE
  Diagnosis of primary central nervous system lymphoma (PCNSL) is usually confirmed by brain biopsy and subsequent neuropathologic workup. 5-Aminolevulinic acid (5-ALA)-induced fluorescence has been established for diagnostic and therapeutic purposes in glioma treatment during the last few years and is discussed for use in other cranial tumors. Its role in diagnosis and treatment of PCNSL is still elusive.
  
  
  METHODS
  This retrospective study includes clinical, magnetic resonance imaging, pathologic and surgical data of selected 11 patients with PCNSL at two university hospitals within the last 4 years undergoing surgical treatment for resection because of imminent mass effect or suspected cerebral glioma. Patients received 5-ALA for fluorescence-guided resection preoperatively.
  
  
  RESULTS
  The 11 subjects age ranged from 59 to 81 years. Postsurgical pathologic workup revealed malignant B cell lymphoma with morphologic features of diffuse large B cell lymphoma. Eight of these 11 patients with PCNSL showed a clear fluorescence induced by 5-ALA. After surgical resection, patients were treated with combination chemotherapy regimens.
  
  
  CONCLUSIONS
  In patients with glioma, the use of 5-ALA is known to be associated with increased extent of resection and survival benefit. Our data and retrospective analysis of a larger patient cohort suggest that the use of 5-ALA in PCNSL should be included in a surgical approach, if this is reconsidered for select patients within a clinical study. In addition, even photodynamic therapy in combination with 5-ALA might be studied.
authors.affiliation: Department of Medicine, Hematology and Oncology, University Hospital of Muenster, Muenster, Germany.
authors.forename: Georg
authors.initials: G
authors.lastname: Evers
authors.affiliation: Department of Neurosurgery, University Hospital of Düsseldorf, Düsseldorf, Germany.
authors.forename: Marcel
authors.initials: M
authors.lastname: Kamp
authors.affiliation: Department of Neurosurgery, University Hospital of Muenster, Muenster, Germany.
authors.forename: Nils
authors.initials: N
authors.lastname: Warneke
authors.affiliation: Department of Medicine, Hematology and Oncology, University Hospital of Muenster, Muenster, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Berdel
authors.affiliation: Department of Neurosurgery, University Hospital of Düsseldorf, Düsseldorf, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Sabel
authors.affiliation: Department of Neurosurgery, University Hospital of Muenster, Muenster, Germany.
authors.forename: Walter
authors.initials: W
authors.lastname: Stummer
authors.affiliation: Department of Neurosurgery, University Hospital of Muenster, Muenster, Germany. Electronic address: christian.ewelt@ukmuenster.de.
authors.forename: Christian
authors.initials: C
authors.lastname: Ewelt
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000622:Aminolevulinic Acid / Q000008:administration & dosage*; D001932:Brain Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery*; D005260:Female; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000008:administration & dosage*; D006801:Humans; D016393:Lymphoma, B-Cell / Q000000981:diagnostic imaging* / Q000601:surgery*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D010778:Photochemotherapy / Q000379:methods; D012189:Retrospective Studies
chemical_list: D005456:Fluorescent Dyes; D000622:Aminolevulinic Acid
keywords: 5-Aminolevolinic acid; Diffuse large B cell lymphoma; Fluorescence-guided surgery; Photodynamic therapy; Primary central nervous system lymphoma