title: Diameter of the collagen fibrils in the sclerodermatous skin of porphyria cutanea tarda.
abstract: The diameter of collagen fibrils was studied in a patient with porphyria cutanea tarda in a specimen obtained from the sclerodermatous skin of the back. A bimodal distribution of the diameter of the fibrils was observed with maxima at 33.5 nm and 68.7 nm. The mean diameter was 67 nm with a standard deviation of 10.6 nm. These results are similar to those obtained previously in localized scleroderma (morphoea).
mesh_terms: D000368:Aged; D003094:Collagen; D003238:Connective Tissue / Q000648:ultrastructure*; D006801:Humans; D008297:Male; D011164:Porphyrias / Q000473:pathology*; D012594:Scleroderma, Localized / Q000473:pathology; D012867:Skin / Q000648:ultrastructure*
chemical_list: D003094:Collagen