Melanotrichia

From Dog

Melanotrichia is an uncommon skin disorder of dogs characterized by hyperpigmentation of hair follicles.

Histologically, it appears as increased epidermal and occasionally dermal melanin within hair shafts and hair follicles.

This condition is commonly seen following healing of deep epidermal wounds such as vasculitis and panniculitis and resolution of hormonal diseases such as hyperadrenocorticism]].