Related Experiment Video
Updated: Jun 15, 2026

07:54
Design, Fabrication, and Administration of the Hand Active Sensation Test (HASTe)
Published on: September 8, 2015
The H syndrome
1Department of Dermatology, Venereology and Andrology, Ain Shams University, Cairo, Egypt. krmhmd@yahoo.com
Pediatric Dermatology
|March 5, 2010
Summary
H syndrome, a genodermatosis from hENT3 mutations, causes skin issues like sclerosis and hyperpigmentation. This review discusses a case and related reports of this rare genetic disorder.
Area of Science:
- Genetics
- Dermatology
- Molecular Biology
Background:
- H syndrome is a rare autosomal recessive genodermatosis.
- It results from mutations in the nucleoside transporter hENT3.
- This condition presents with distinct dermatological and systemic manifestations.
Observation:
- The case study details a patient with H syndrome.
- Characterized by progressive cutaneous sclerosis, hyperpigmentation, and hypertrichosis.
- These skin changes follow a specific, recognizable pattern.
Findings:
- Mutations in hENT3 are confirmed as the cause of H syndrome.
- The syndrome involves significant systemic manifestations alongside skin changes.
- Analysis of related reports provides further insight into the disease spectrum.
Implications:
- Understanding hENT3's role is crucial for H syndrome diagnosis.
- This research highlights the link between nucleoside transport and genodermatosis.
- Further studies may reveal therapeutic targets for H syndrome and related disorders.
Related Concept Videos
Hyperosmolar Hyperglycemic State
Hyperosmolar Hyperglycemic State, or HHS, is a serious and life-threatening complication of type 2 diabetes mellitus. It is characterized by three main features: severe hyperglycemia, profound dehydration, and elevated serum osmolality, all occurring without significant ketoacidosis.HHS typically develops in older adults or individuals with limited access to fluids. This may result from illness, cognitive impairment, or medications such as diuretics or corticosteroids. These factors reduce...
Cardiomyopathy III: Hypertrophic Cardiomyopathy
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
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,...
Horney's Sociocultural Approach
Karen Horney's psychoanalytic theories emphasize the potential for self-realization and the importance of addressing social and cultural, rather than biological, factors in personality development. She challenged traditional Freudian views, particularly Freud's concept of "penis envy," which she argued stemmed from cultural influences rather than inherent biological differences. Horney believed that any sense of inferiority in women was a result of societal conditioning, such as dependence on...
Hazard Ratio
The hazard ratio (HR) is a widely used measure in clinical trials to compare the risk of events, such as death or disease recurrence, between two groups over time. It reflects the ratio of hazard rates—the instantaneous risk of the event occurring—between a treatment group and a control group. This measure provides valuable insights into the relative effectiveness of a treatment by assessing how the risk of an event differs between the two groups.
For example, in a clinical trial evaluating a...
For example, in a clinical trial evaluating a...
Hypothalamic-Pituitary Axis
The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.

