title: Array-comparative genomic hybridization in sporadic benign pheochromocytomas.
abstract: Pheochromocytomas (PCC) are catecholamine-producing tumors arising from the adrenal medulla that occur either sporadically or in the context of hereditary cancer syndromes, such as multiple endocrine neoplasia type 2 (MEN2), von Hippel-Lindau disease (VHL), neurofibromatosis type 1, and the PCC-paraganglioma syndrome. Conventional comparative genomic hybridization studies have shown loss of 1p and 3q in the majority of sporadic and MEN2-related PCC, and 3p and 11p loss in VHL-related PCC. The development of a submegabase tiling resolution array enabled us to perform a genome-wide high-resolution analysis of 36 sporadic benign PCC. The results show that there are two distinct patterns of abnormalities in these sporadic PCC, one consisting of loss of 1p with or without concomitant 3q loss in 20/36 cases (56%), the other characterized by loss of 3p with or without concomitant 11p loss in 11/36 (31%). In addition, we found loss of chromosome 22q at high frequency (35%), as well as the novel finding of high frequency chromosome 21q loss (21%). We conclude that there appear to be two subgroups of benign sporadic PCC, one of which has a pattern of chromosomal abnormalities that is comparable with PCC from patients with MEN2 and the other that is comparable with the PCC that arise in patients with VHL disease. In addition, genes on 21q and 22q might play a more important role in PCC pathogenesis than had been assumed thus far.
authors.affiliation: Department of Pathology, Josephine Nefkens Institute, Erasmus MC-University Medical Center Rotterdam, Rotterdam, The Netherlands. t.vannederveen@erasmusmc.nl
authors.forename: Francien H
authors.initials: FH
authors.lastname: van Nederveen
authors.forename: Esther
authors.initials: E
authors.lastname: Korpershoek
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: deLeeuw
authors.forename: Albert A
authors.initials: AA
authors.lastname: Verhofstad
authors.forename: Jacques W
authors.initials: JW
authors.lastname: Lenders
authors.forename: Winand N M
authors.initials: WN
authors.lastname: Dinjens
authors.forename: Wan L
authors.initials: WL
authors.lastname: Lam
authors.forename: Ronald R
authors.initials: RR
authors.lastname: de Krijger
mesh_terms: D000293:Adolescent; D000310:Adrenal Gland Neoplasms / Q000235:genetics*; D000328:Adult; D000368:Aged; D002648:Child; D002869:Chromosome Aberrations; D002878:Chromosomes, Human, Pair 1 / Q000235:genetics; D002891:Chromosomes, Human, Pair 21 / Q000235:genetics; D002892:Chromosomes, Human, Pair 22 / Q000235:genetics; D002893:Chromosomes, Human, Pair 3 / Q000235:genetics; D055028:Comparative Genomic Hybridization; D005260:Female; D006801:Humans; D019656:Loss of Heterozygosity; D008297:Male; D008875:Middle Aged; D018813:Multiple Endocrine Neoplasia Type 2a / Q000235:genetics; D009154:Mutation / Q000235:genetics; D020411:Oligonucleotide Array Sequence Analysis; D010673:Pheochromocytoma / Q000235:genetics*; D051794:Von Hippel-Lindau Tumor Suppressor Protein / Q000235:genetics; D055815:Young Adult
chemical_list: D051794:Von Hippel-Lindau Tumor Suppressor Protein; C497446:VHL protein, human