title: Psoriasis of the tongue.
abstract: BACKGROUND
  Psoriasis is a common, chronic dermatologic disease. Cases affecting the oral mucous membranes are rarely reported in the international literature, in particular tongue lesions are hardly ever documented.
  
  
  METHODS
  This article presents a 61 year old patient with persistent whitish lesion on his tongue. Biopsy specimens from mid surface and tip of the tongue were taken. Histopathologic sections were stained with haematoxylin-eosin (H-E) as well as with Periodic acid-Schiff (PAS) and examined by light microscopy.
  
  
  RESULTS
  Tongue lesions showing epithelial hyperplasia, parakeratosis, long papillae, neutrophils and microabscesses of Munro.
  
  
  CONCLUSIONS
  The reported case suggests that the clinical and histological appearances of the lesions are consistent with mucosal psoriasis.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University of Kiel, Germany.
authors.forename: Guido C
authors.initials: GC
authors.lastname: Lier
authors.forename: Ulrich
authors.initials: U
authors.lastname: Mrowietz
authors.forename: Mona
authors.initials: M
authors.lastname: Wolfart
authors.forename: Patrick H
authors.initials: PH
authors.lastname: Warnke
authors.forename: Jörg
authors.initials: J
authors.lastname: Wiltfang
authors.forename: Ingo N G
authors.initials: IN
authors.lastname: Springer
mesh_terms: D001706:Biopsy; D004396:Coloring Agents; D003937:Diagnosis, Differential; D004848:Epithelium / Q000473:pathology; D006801:Humans; D006965:Hyperplasia; D007972:Leukoplakia, Oral / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009504:Neutrophils / Q000473:pathology; D011565:Psoriasis / Q000473:pathology*; D014060:Tongue Diseases / Q000473:pathology*
chemical_list: D004396:Coloring Agents