Related Experiment Video
Updated: May 21, 2026

07:01
Manipulation of Gene Function in Mexican Cavefish
Published on: April 22, 2019
Inherited ichthyoses/generalized Mendelian disorders of cornification
Matthias Schmuth1, Verena Martinz, Andreas R Janecke
1Department of Dermatology and Venereology, Innsbruck Medical University, Innsbruck, Austria. matthias.schmuth@i-med.ac.at
European Journal of Human Genetics : EJHG
|June 29, 2012
Summary
Inherited ichthyoses are genetic skin disorders causing scaling. This review provides a diagnostic algorithm to help clinicians identify specific types of ichthyosis based on clinical clues, guiding further testing and treatment.
Area of Science:
- Dermatology
- Genetics
- Molecular Biology
Background:
- Inherited ichthyoses are Mendelian disorders of cornification.
- They manifest as generalized skin scaling and/or hyperkeratosis.
- Caused by mutations affecting keratinocyte differentiation and epidermal barrier function.
Purpose of the Study:
- To provide a diagnostic algorithm for inherited ichthyoses.
- To aid nonspecialists in diagnosing specific ichthyosis subtypes.
- To guide clinicians in further testing and treatment decisions.
Main Methods:
- Review of clinical and genetic diagnostic approaches.
- Algorithmic strategy based on diagnostic clues.
- Guidance for differential diagnosis in scaling dermatoses.
Main Results:
- The review outlines a structured approach to ichthyosis diagnosis.
- It emphasizes utilizing clinical presentation to narrow down possibilities.
- Facilitates targeted genetic testing and appropriate management.
Conclusions:
- A systematic diagnostic approach is crucial for inherited ichthyoses.
- Clinical clues are key to differentiating between subtypes.
- This algorithm assists clinicians in managing these rare genetic skin disorders.
Related Concept Videos
Skin Diseases and Disorders
Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Pleiotropy
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
Sex-linked Disorders
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
Incomplete Dominance
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
Pedigree Analysis
Overview
Inborn Errors of Metabolism
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
