Premium
Somatic mosaicism of chromosome 7 in a highly proliferating melanocytic congenital naevus in a ring chromosome 7 patient
Author(s) -
Mehraein Yasmin,
Ehlhardt Sandra,
Wagner Arnold,
Göttert Elisabeth,
Tilgen Wolfgang,
Zang Klaus D.,
DillMüller Dorothee
Publication year - 2004
Publication title -
american journal of medical genetics part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.064
H-Index - 112
eISSN - 1552-4833
pISSN - 1552-4825
DOI - 10.1002/ajmg.a.30370
Subject(s) - ring chromosome , somatic cell , chromosome , biology , genetics , nevus , karyotype , melanoma , gene
Ring chromosome 7 is a rare but well documented chromosomal aberration in man. So far at least 14 cases have been reported in the literature showing a variable but distinct pattern of phenotypic characteristics in affected individuals. Besides others, skin findings as pigmented naevi are especially frequent. Loss of chromosomal material from the terminal chromosome arms in the structurally abnormal ring chromosome 7 as well as somatic mosaicism with loss or gain of chromosome 7 has been suggested to be responsible for the clinical symptoms. We now report another case of a ring chromosome 7 in a 14‐year‐old boy with multiple remarkable congenital naevi, where we could demonstrate for the first time somatic mosaicism showing significant gain of chromosome 7 within a highly proliferating melanocytic congenital naevus (MCN). © 2004 Wiley‐Liss, Inc.