Development of collagenomas during pregnancy

Collagenomas are considered to be connective tissue nevi composed predominantly of collagen. Collagenomas have been classified into 4 different entities: familial cutaneous collagenoma, the Shagreen patch of tuberous sclerosis, eruptive collagenoma, and other isolated collagenomas. We describe a patient with multiple collagenomas that appeared and multiplied during gestation and discuss the reported cases of collagenomas that have been linked to pregnancy.