title: Fibrous papule of the face. An electron-microscopic study of two cases.
abstract: Fibrous papules on the nose from two patients were examined by electron microscopy. In each, the large characteristic dermal cells had ultrastructural features of fibroblasts, and there was no evidence of either melanocytic or Schwann cell differentiation. Banded structures (long-spacing collagen) were present in one case.
mesh_terms: D005260:Female; D005347:Fibroblasts / Q000648:ultrastructure; D005350:Fibroma / Q000648:ultrastructure*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009669:Nose Neoplasms / Q000648:ultrastructure*; D012878:Skin Neoplasms / Q000648:ultrastructure*