Congenital pachyparathyroidism
Congenital pachyonychia congenita is a rare inherited skin disease of onychomycosis, first named by Jadassohn and Lewandowsky in 1906. Classification: Usually divided into four types, type Ⅰ is the most common, Jadassohn-Lewandowsky syndrome; type Ⅱ is Jackson-Sertoli syndrome; type Ⅲ is also known as Schaferer-Branauer syndrome; type Ⅳ is also known as late-onset congenital thick nails Disease (pachyonychia congenita tarda).
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