Loss of heterozygosity 1p36 and 19q13 is a prognostic factor for overall survival in patients with diffuse WHO grade 2 gliomas treated without chemotherapy

Mariani, Luigi; Deiana, Gianluca; Vassella, Erik; Fathi, Ali-Reza; Murtin, Christine; Arnold, Marlène; Vajtai, Istvan; Weis, Joachim; Siegenthaler, Peter; Schobesberger, Martina; Reinert, Michael M (2006). Loss of heterozygosity 1p36 and 19q13 is a prognostic factor for overall survival in patients with diffuse WHO grade 2 gliomas treated without chemotherapy. Journal of clinical oncology, 24(29), pp. 4758-63. Alexandria, Va.: American Society of Clinical Oncology 10.1200/JCO.2006.05.9238

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PURPOSE: This study was conducted to elucidate the impact of loss of heterozygosity (LOH) for chromosomes 1p36 and 19q13 on the overall survival of patients with diffusely infiltrating WHO grade 2 gliomas treated without chemotherapy. PATIENTS AND METHODS: We assessed the LOH status of tumors from patients harboring WHO grade 2 gliomas diagnosed between 1991 and 2000. Patients were either followed after initial biopsy or treated by surgery and/or radiation therapy (RT). Overall survival, time to malignant transformation, and progression-free survival were last updated as of March 2005. RESULTS: Of a total of 79 patients, LOH 1p36 and LOH 19q13 could be assessed in 67 and 66 patients, respectively. The median follow-up after diagnosis was 6 years. Loss of either 1p or 19q, in particular codeletion(s) at both loci, was found to positively impact on both overall survival (log-rank P < .01), progression-free survival, and survival without malignant transformation (P < .05). Tumor volume (P < .0001), neurologic deficits at diagnosis (P < .01), involvement of more than one lobe (P < .01), and absence of an oligodendroglial component (P < .05) were also predictors of shorter overall survival. The extent of surgery was similar in patients with or without LOH 1p and/or 19q; RT was more frequently resorted to for patients without than for patients with LOH 1p/19q (30% v 60%). CONCLUSION: The presence of LOH on either 1p36 or 19q13, and in particular codeletion of both loci is a strong, nontreatment-related, prognostic factor for overall survival in patients with diffusely infiltrating WHO grade 2 gliomas.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Service Sector > Institute of Pathology > Clinical Pathology 04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurosurgery 04 Faculty of Medicine > Service Sector > Institute of Pathology
UniBE Contributor:	Mariani, Luigi, Vassella, Erik, Vajtai, Istvan, Reinert, Michael
ISSN:	0732-183X
ISBN:	16966689
Publisher:	American Society of Clinical Oncology
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:45
Last Modified:	05 Dec 2022 14:14
Publisher DOI:	10.1200/JCO.2006.05.9238
PubMed ID:	16966689
Web of Science ID:	000241191900014
URI:	https://boris.unibe.ch/id/eprint/18829 (FactScience: 1068)