The perforating disorders comprise a group of pathologic abnormalities sharing the common characteristic of transepidermal elimination. This is characterized by the elimination or extrusion of altered dermal substances. They have been divided into 4 types: Kyrle's disease, perforating folliculitis, reactive perforating collagenosis, and elastosis perforans serpiginosa. This classification is primarily based on the nature of the eliminated material and the type of epidermal disruption.
In a study, researchers reviewed 5 cases of perforating disorders of skin which included two cases of Kyrle's disease, 2 cases of reactive perforating collagenosis and a single case of perforating folliculitis. However, they did not observe any case of elastosis perforans serpiginosa. Kyrle's disease has two distinct forms: An inherited form that presents in childhood and an acquired form that usually…