collagenoma - Humpath - 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, flesh-colored plaques and nodules, 0.5–5.0 cm in diameter, on the trunk and upper part of the arms.