Publication Details
Zimmermann-Laband syndrome in monozygotic twins with a mild neurobehavioral phenotype lacking gingival overgrowth-A case report of a novel KCNN3 gene variant
RYBA, L.
KŘEPELOVÁ, A.
MOSLEROVÁ, V.
ZELINOVÁ, M.
TURNOVEC, M.
MARTINKOVÁ, J.
KRATOCHVÍLOVÁ, L.
Drahanský Martin, prof. Ing., Ph.D.
MACEK, M.
HAVLOVICOVÁ, M.
channelopathy, gingival fibromatosis, KCNN3, monozygotic twins, ZimmermannLaband
syndrome
Zimmermann-Laband syndrome is a rare, heterogeneous disorder characterized by
gingival hypertrophy or fibromatosis, aplastic/hypoplastic nails, hypoplasia of
the distal phalanges, hypertrichosis, various degrees of intellectual disability,
and distinctive facial features. Three genes are considered causative for ZLS:
KCNH1, KCNN3, and ATP6V1B2. We report on a pair of female concordant monozygotic
twins, both carrying a novel pathogenic variant in the KCNN3 gene, identified
using exome sequencing. Only six ZLS patients with the KCNN3 pathogenic variant
have been reported so far. The twins show facial dysmorphism, hypoplastic distal
phalanges, aplasia or hypoplasia of nails, and hypertrichosis. During infancy,
they showed mild developmental delays, mainly speech. They successfully completed
secondary school education and are socio economically independent. Gingival
overgrowth is absent in both individuals. Our patients exhibited an unusually
mild phenotype compared to published cases, which is an important diagnostic
finding for proper genetic counseling for Zimmermann-Laband syndrome patients and
their families.
@article{BUT176372,
author="SCHWARZ, M. and RYBA, L. and KŘEPELOVÁ, A. and MOSLEROVÁ, V. and ZELINOVÁ, M. and TURNOVEC, M. and MARTINKOVÁ, J. and KRATOCHVÍLOVÁ, L. and DRAHANSKÝ, M. and MACEK, M. and HAVLOVICOVÁ, M.",
title="Zimmermann-Laband syndrome in monozygotic twins with a mild neurobehavioral phenotype lacking gingival overgrowth-A case report of a novel KCNN3 gene variant",
journal="American Journal of Medical Genetics, Part A",
year="2021",
volume="2021",
number="12",
pages="1--5",
doi="10.1002/ajmg.a.62616",
issn="1552-4833",
url="https://onlinelibrary.wiley.com/doi/10.1002/ajmg.a.62616"
}