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A clinical and genetic study of X‐linked recessive ichthyosis and contiguous gene defects
Author(s) -
PAIGE D.G.,
EMILION G.G.,
BOULOUX P.M.G.,
HARPER J.I.
Publication year - 1994
Publication title -
british journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.304
H-Index - 179
eISSN - 1365-2133
pISSN - 0007-0963
DOI - 10.1111/j.1365-2133.1994.tb04972.x
Subject(s) - ichthyosis , chondrodysplasia punctata , kallmann syndrome , short stature , steroid sulfatase , genetics , x chromosome , congenital ichthyosis , medicine , gene , genetic counseling , mutation , klinefelter syndrome , infertility , chromosome , biology , disease , pediatrics , pregnancy , endocrinology , pathology , steroid , covid-19 , hormone , infectious disease (medical specialty)
Summary X‐linked recessive ichthyosis (XLI) is caused by a deletion, or mutation, of the steroid sulphatase gene on the distal short arm of the X chromosome (Xp22.3). This region of the X chromosome is particularly susceptible to deletions. Such deletions can occasionally extended to involve neighbouring genes, causing a contiguous gene defect. Therefore, XLI may be associated with Kallmann's syndrome (KS), mental retardation, X‐linked recessive chondrodysplasia punctata and short stature. We have reviewed 33 patients with XLI. Nine showed evidence of contiguous gene defects. A further four had neurological deficit sustained at the time of birth. This study highlights the importance of screening patients with X‐linked recessive ichthyosis for neighbouring genetic disorders and, in particular, the early identification of KS, as delay in diagnosis may lead to infertility and osteoporosis. Parents should be warned about possible obstetric complications due to prolonged labour in future pregnancies.