= benign fibroblastic proliferation arising from dermis

Age: 15–45 years

Predisposed: persons of African / Chinese descent

Associated with: trauma, infection, connective tissue disease (at sites of increased skin tension)

Histo: hypocellular densely collagenous lesions

Location: face, shoulder, forearm, hand

• mass effect, pruritus, paresthesia, cosmetic deformity

MR:

• short T2 relaxation

Rx: surgical excision combined with surgical injection of corticosteroids / postsurgical radiation therapy