Epidermolysis bullosa simplex
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Epidermolysis bullosa simplex | |
---|---|
Synonyms | N/A |
Pronounce | N/A |
Specialty | N/A |
Symptoms | Blister formation on the skin, especially on the hands and feet |
Complications | Infection, scarring, nail dystrophy |
Onset | Infancy or early childhood |
Duration | Chronic |
Types | N/A |
Causes | Genetic disorder |
Risks | Family history of the condition |
Diagnosis | Clinical diagnosis, genetic testing |
Differential diagnosis | Other forms of epidermolysis bullosa, bullous pemphigoid, pemphigus vulgaris |
Prevention | N/A |
Treatment | Wound care, pain management, protective bandaging |
Medication | Topical antibiotics, pain relievers |
Prognosis | Generally good with proper management |
Frequency | 1 in 30,000 to 50,000 live births |
Deaths | N/A |
Epidermolysis bullosa simplex (EBS) is a genetic disorder characterized by the formation of blisters at the dermoepidermal junction. This condition arises due to mutations in the genes encoding for keratin 5 or keratin 14, critical proteins responsible for skin integrity. Often referred to as epidermolytic, EBS is one of several types of epidermolysis bullosa, each differing in its genetic cause and phenotypic expression.
Cause
The primary cause of EBS is the:
- Absence of Keratin-5 and Keratin-14: These proteins are vital for maintaining the structural integrity of the skin. Due to mutations in their corresponding genes, affected individuals lack these keratins from birth, leading to the skin's vulnerability to minor mechanical stresses.
Pathophysiology
Blister formation in EBS occurs at the point where the epidermis meets the dermis, known as the dermoepidermal junction. As a result of the defective or missing keratin proteins:
- Reduced Skin Stability: The skin layers fail to adhere properly, leading to increased susceptibility to blistering.
- Blisters: These can arise from minor trauma or friction, and they may be painful and pose a risk of secondary infection.
Diagnosis
The diagnosis of EBS typically involves:
- Clinical Examination: Presence of blisters, especially in infancy, may hint towards EBS.
- Genetic Testing: Confirmation of the disease can be achieved by identifying mutations in the genes encoding keratin 5 or keratin 14.
- Skin Biopsy: Examining a small tissue sample under the microscope can reveal abnormalities consistent with EBS.
Classification
Epidermolysis bullosa, as a group of disorders, is classified based on the location of blister formation, genetic cause, and clinical presentation. While EBS involves the dermoepidermal junction, other types may have blisters forming deeper within the skin or have different clinical features. Understanding this classification can aid in treatment decisions and prognostic predictions.
See Also
References
Further reading
External links
Diseases of the skin and appendages by morphology | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Cytoskeletal defects | ||||||||||||||||||||
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See also: cytoskeletal proteins
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Contributors: Prab R. Tumpati, MD