Also known as Ichthyosis hystrix gravior or porcupine man.

Ichthyosis hystrix is a group of rare skin disorders in the ichthyosis family of skin disorders characterized by massive hyperkeratosis with an appearance like spiny scales.

HID syndrome is also known as Ichthyosis hystrix, Rheydt type after the German city of Rheydt near Düsseldorf where it was first discovered.

Disorder of Cornification 8, Curth-Macklin Type DOC 8, Curth-Macklin Type None Ichthyosis hystrix, Curth-Macklin type is a rare inherited skin disorder.