Revised nomenclature and classification of inherited ichthyoses: results of the First Ichthyosis Consensus Conference in Sorèze 2009.
BACKGROUND
Inherited ichthyoses belong to a large, clinically and etiologically heterogeneous group of mendelian disorders of cornification, typically involving the entire integument. Over the recent years, much progress has been made defining their molecular causes. However, there is no internationally accepted classification and terminology.


OBJECTIVE
We sought to establish a consensus for the nomenclature and classification of inherited ichthyoses.


METHODS
The classification project started at the First World Conference on Ichthyosis in 2007. A large international network of expert clinicians, skin pathologists, and geneticists entertained an interactive dialogue over 2 years, eventually leading to the First Ichthyosis Consensus Conference held in Sorèze, France, on January 23 and 24, 2009, where subcommittees on different issues proposed terminology that was debated until consensus was reached.


RESULTS
It was agreed that currently the nosology should remain clinically based. "Syndromic" versus "nonsyndromic" forms provide a useful major subdivision. Several clinical terms and controversial disease names have been redefined: eg, the group caused by keratin mutations is referred to by the umbrella term, "keratinopathic ichthyosis"-under which are included epidermolytic ichthyosis, superficial epidermolytic ichthyosis, and ichthyosis Curth-Macklin. "Autosomal recessive congenital ichthyosis" is proposed as an umbrella term for the harlequin ichthyosis, lamellar ichthyosis, and the congenital ichthyosiform erythroderma group.


CONCLUSIONS
As more becomes known about these diseases in the future, modifications will be needed.


CONCLUSIONS
We have achieved an international consensus for the classification of inherited ichthyosis that should be useful for all clinicians and can serve as reference point for future research.
Oji
Vinzenz
V
Department of Dermatology, University Hospital Münster, Münster, Germany. ojiv@uni-muenster.de
Tadini
Gianluca
G
Akiyama
Masashi
M
Blanchet Bardon
Claudine
C
Bodemer
Christine
C
Bourrat
Emmanuelle
E
Coudiere
Philippe
P
DiGiovanna
John J
JJ
Elias
Peter
P
Fischer
Judith
J
Fleckman
Philip
P
Gina
Michal
M
Harper
John
J
Hashimoto
Takashi
T
Hausser
Ingrid
I
Hennies
Hans Christian
HC
Hohl
Daniel
D
Hovnanian
Alain
A
Ishida-Yamamoto
Akemi
A
Jacyk
Witold K
WK
Leachman
Sancy
S
Leigh
Irene
I
Mazereeuw-Hautier
Juliette
J
Milstone
Leonard
L
Morice-Picard
Fanny
F
Paller
Amy S
AS
Richard
Gabriele
G
Schmuth
Matthias
M
Shimizu
Hiroshi
H
Sprecher
Eli
E
Van Steensel
Maurice
M
Taïeb
Alain
A
Toro
Jorge R
JR
Vabres
Pierre
P
Vahlquist
Anders
A
Williams
Mary
M
Traupe
Heiko
H
D000293:Adolescent; D000328:Adult; D002648:Child; D003226:Congresses as Topic; D003879:Dermatologic Agents / Q000627:therapeutic use; D005260:Female; D005602:France; D005786:Gene Expression Regulation; D020022:Genetic Predisposition to Disease; D006801:Humans; D016113:Ichthyosiform Erythroderma, Congenital / Q000145:classification* / Q000188:drug therapy / Q000235:genetics*; D007057:Ichthyosis / Q000145:classification; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D017410:Practice Guidelines as Topic / Q000592:standards*; D011379:Prognosis; D012720:Severity of Illness Index; D009626:Terminology as Topic; D055815:Young Adult
D003879:Dermatologic Agents