Related Experiment Video
Updated: Aug 6, 2026

08:07
Label-Free Non-Linear Optics for the Study of Tubulin-Dependent Defects in Central Myelin
Published on: March 24, 2023
Tuberous sclerosis complex associated with dyschromatosis universalis hereditaria
M P Binitha1, Daisy Thomas, L K Asha
1Department of Dermatology and Venereology, Medical College, Calicut, Kerala, India. mpbinitha@sify.com
Indian Journal of Dermatology, Venereology and Leprology
|August 2, 2006
Summary
Tuberous sclerosis and dyschromatosis universalis hereditaria, both genetic disorders, were found together in a rare case. This unique presentation involved skin pigment changes on the palms, soles, and oral mucosa.
Area of Science:
- Genetics
- Dermatology
- Rare Diseases
Background:
- Tuberous sclerosis is an autosomal dominant genetic disorder causing hamartomas in multiple organs.
- Dyschromatosis universalis hereditaria is an autosomal dominant genodermatosis with widespread pigment macules, typically sparing the face, palms, soles, and oral mucosa.
Observation:
- A patient presented with clinical features of both tuberous sclerosis and dyschromatosis universalis hereditaria.
- The patient exhibited hyperpigmented and hypopigmented macules on the palms, soles, and oral mucosa, which are typically spared in dyschromatosis universalis hereditaria.
Findings:
- This case represents the first reported co-occurrence of tuberous sclerosis and dyschromatosis universalis hereditaria.
- The presentation challenges the typical sparing of palms, soles, and oral mucosa in dyschromatosis universalis hereditaria when associated with tuberous sclerosis.
Implications:
- This association may suggest a shared genetic pathway or modifier genes influencing pigmentary changes in these conditions.
- Further research into this rare co-occurrence could enhance understanding of the pathogenesis of both tuberous sclerosis and dyschromatosis universalis hereditaria.
- Clinical awareness of this potential association is important for accurate diagnosis and management of patients with tuberous sclerosis.
Related Concept Videos
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,...
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,...
Pedigree Analysis
Overview
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.
Genetic Lingo
Overview
Type I Diabetes I: Introduction
Type 1 diabetes mellitus is a chronic metabolic disorder characterized by an absolute deficiency of insulin resulting from the autoimmune destruction of pancreatic β-cells. Although it can occur at any age, it is most commonly diagnosed in childhood, adolescence, or early adulthood. The loss of insulin production impairs cellular glucose uptake, resulting in persistent hyperglycemia and necessitating lifelong insulin therapy.Autoimmune Destruction of β-CellsThe hallmark of type 1 diabetes is an...

