Volume 64, Issue 1 pp. 51-61
Review Article

Revisiting X-linked congenital ichthyosis

Baishun Zhou

Baishun Zhou

Department of Pathology, School of Medicine, Hunan Normal University, Changsha, People's Republic of China

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Cancan Liang

Cancan Liang

Department of Pathology, School of Medicine, Hunan Normal University, Changsha, People's Republic of China

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Peiyao Li

Corresponding Author

Peiyao Li

Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, China NHC Key Laboratory of Carcinogenesis, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China

Correspondence

Heng Xiao

Department of Pathology

School of Medicine

Hunan Normal University

371 Tongzipo Road

Changsha

Hunan 410013

People's Republic of China

E-mail: [email protected]

Peiyao Li

Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education

China NHC Key Laboratory of Carcinogenesis

Xiangya Hospital

Central South University

Changsha

Hunan 410008

People's Republic of China

E-mail: [email protected]

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Heng Xiao

Corresponding Author

Heng Xiao

Department of Pathology, School of Medicine, Hunan Normal University, Changsha, People's Republic of China

Correspondence

Heng Xiao

Department of Pathology

School of Medicine

Hunan Normal University

371 Tongzipo Road

Changsha

Hunan 410013

People's Republic of China

E-mail: [email protected]

Peiyao Li

Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education

China NHC Key Laboratory of Carcinogenesis

Xiangya Hospital

Central South University

Changsha

Hunan 410008

People's Republic of China

E-mail: [email protected]

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First published: 31 July 2024
Citations: 2

Conflict of interest: None.

Funding source: This work was supported by the National Natural Science Foundation of China (81903199, 81802871) and the Natural Science Foundation of Hunan Province (2021JJ40373, 2023JJ30901).

Abstract

X-linked recessive ichthyosis (XLI) is a hereditary skin disease characterized by generalized dryness and scaling of the skin, with frequent extracutaneous manifestations. It is the second most common type of ichthyosis, with a prevalence of 1/6,000 to 1/2,000 in males and without any racial or geographical differences. The causative gene for XLI is the steroid sulfatase gene (STS), located on Xp22.3. STS deficiency causes an abnormal cholesterol sulfate (CS) accumulation in the stratum corneum (SC). Excess CS induces epidermal permeability barrier dysfunction and scaling abnormalities. This review summarizes XLI's genetic, clinical, and pathological features, pathogenesis, diagnosis and differential diagnoses, and therapeutic perspectives. Further understanding the role of the STS gene pathogenic variants in XLI may contribute to a more accurate and efficient clinical diagnosis of XLI and provide novel strategies for its treatment and prenatal diagnosis.

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