collagenoma Human pathology
Jun 13, 2006· collagenoma. Tuesday 13 June 2006. Definition: Collagenomas (connective tissue nevi of collagen type) are rare hamartomas of the skin in which there is an increase in dermal collagen. Macroscopy. Collagenomas usually present as asymptomatic, firm, fleshcolored plaques and nodules, – cm in diameter, on the trunk and upper part of the arms.