Darier disease and Hailey-Hailey disease.

Area of Science:

• Dermatology
• Genetics
• Medical Research

Background:

• Darier disease (DD) and Hailey-Hailey disease (HHD) are rare genodermatoses inherited in an autosomal dominant pattern.
• DD is linked to mutations in the ATP2A2 gene, while HHD is associated with ATP2C1 gene mutations.
• Both conditions present with skin lesions but can involve other systems.

Purpose of the Study:

• To investigate and compare the clinical and laboratory findings of two patients, one with Darier disease and one with Hailey-Hailey disease.
• To emphasize the distinct nature of these genodermatoses despite superficial similarities.

Main Methods:

• Clinical examination of two patients diagnosed with Darier disease and Hailey-Hailey disease.
• Review of laboratory findings and family history for both cases.
• Comparison of clinical, genetic, and histopathological features.

Main Results:

• The patient with Darier disease presented with mucosal and dental lesions, alongside mild mental retardation.
• The patient with Hailey-Hailey disease exhibited skin lesions associated with neuropsychiatric and endocrinologic disorders.
• Both patients inherited their respective mutations from a parent.

Conclusions:

• Darier disease and Hailey-Hailey disease, though sharing some clinical characteristics, are distinct entities.
• Genetic mutations (ATP2A2 for DD, ATP2C1 for HHD) and varied clinical manifestations confirm their separate identities.
• Understanding these differences is crucial for accurate diagnosis and management.