<unk>  is a group of rare skin disorders in the<unk>  family of skin disorders characterized by massive hyperkeratosis with an appearance like spiny scales. This term is also used to refer to a type of epidermal nevi with extensive bilateral distribution.
Ichthyosis hystrix
Aromaticum rosatum
Ichthyosis bullosa of Siemens
Lentigo simplex
Acrokeratosis verruciformis
Tinea faciei
Keratoderma blennorrhagicum
Lichen scrofulosorum