By Gary M. White, MD


Collagenomas are a subset of connective tissue nevi (CTN) in which an overabundance of collagen causes lesions in the skin. CTN may have an abundance of collagen, elastin or both. Collagenomas may be congenital or acquired.

Collagenomas may occur in various clinical situations including:


Eruptive collagenomas is a condition which presents with the eruption of multiple, flesh-colored asymptomatic nodules usually in adolescence. By definition, there is no family history. If a family history is present, the term familial cutaneous collagenomas is used [JAAD 1999;40;255].

Isolated collagenomas occur as flesh-colored nodules occurring almost anywhere, including the scalp. They may be congenital or acquired.


No effective treatment is known.

Additional Pictures

Firm nodular lesion of the scalp present at birth.



Large zosteriform collagenous nevus IJDVL 2007;73;143


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