Related Experiment Video
Updated: Jul 6, 2026

06:48
Fingerprinting Cardiolipin in Leukocytes by Mass Spectrometry for a Rapid Diagnosis of Barth Syndrome
Published on: March 23, 2022
Shah-Waardenburg syndrome.
1Dermatology Consultation, Kalamassery, Ernakulam, India.
Dermatology Online Journal
|March 6, 2008
Summary
Shah-Waardenburg syndrome, a rare Waardenburg syndrome variant, presents with pigmentary anomalies and congenital megacolon. This genetic disorder likely stems from neural crest cell migration defects.
Area of Science:
- Genetics
- Developmental Biology
- Clinical Medicine
Background:
- Waardenburg syndrome is a group of rare genetic disorders.
- These disorders are characterized by varying degrees of hearing loss and pigmentation abnormalities.
Observation:
- This report details a case of Shah-Waardenburg syndrome, a rare variant.
- The syndrome presents with distinct pigmentary anomalies and congenital megacolon.
Findings:
- Shah-Waardenburg syndrome is inherited in autosomal recessive or dominant patterns.
- The underlying pathology is presumed to involve defective neural crest cell migration during development.
Implications:
- Understanding this rare variant aids in diagnosing and managing complex genetic disorders.
- Further research into neural crest cell migration defects can illuminate broader developmental processes.
Related Concept Videos
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.
Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
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.
Huntington Disease l: Introduction
Huntington disease or HD is a progressive, fatal neurodegenerative disorder inherited in an autosomal dominant pattern.PathophysiologyIt is caused by expansion of the CAG trinucleotide repeat in the HTT gene on chromosome 4 (4p16.3), producing an abnormal huntingtin protein with an expanded polyglutamine tract. This misfolded protein disrupts cellular function, leading to neuronal death. Normal alleles have ≤26 repeats, 27–35 are intermediate (risk of expansion), 36–39 show reduced penetrance,...
Portal Hypertension
Portal hypertension is an increase in blood pressure within the portal venous system. Normally, this pressure is less than 5 mmHg. It is considered clinically significant when it rises above 10 mmHg. At this threshold, complications from altered blood flow and venous congestion emerge.EtiologyPortal hypertension arises from conditions that impede blood flow through the liver. The most common cause is cirrhosis, in which chronic liver injury leads to fibrotic scarring. This fibrosis narrows or...

