<prompt> Dyskeratosis is seen in:Pemphigus vulgarisBullous PemphigoidDariers diseaseHailey-Hailey disease  <response>: Dariers disease is characterized by defect in Ca2 pump that is necessary for desmosome function, due to mutation in ATP2A2 gene.Both HHD and Dariers disease are characterized by acantholysis and suprabasal blister, but dysteratosis premature keratinization in epidermis is seen classically with Dariers disease. 