Cutaneous horns generally present as curved hard yellow brown horns.
They can be surrounded by normal skin or have a border of thickened skin.
The side of the horn may be terrace-like with horizontal ridges.
The base of the horn may be flat, protruding, or like a crater.
Inflammation may be present, due to recurrent injury.
Typically, the horn is taller than twice the width at the base.
It may vary from a few millimetres to several centimetres in size.
Giant horns exist – the largest described is a 76 year old Parisian woman named Madame Dimanche (Widow Sunday) in the 19th century, who grew a 25cm horn from her forehead
Cutaneous horns are usually singular, but can be multiple.
They can occur anywhere on the body, but are more common on sun-exposed areas especially the head and ears, back of hands and forearms.
They may also occur on the chest, neck, shoulder and penis.
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