title: Immunohistochemical and ultrastructural characterization of tonofilament and hemidesmosome abnormalities in a case of epidermolysis bullosa herpetiformis (Dowling-Meara).
abstract: BACKGROUND
  A neonate with epidermolysis bullosa herpetiformis (EBH) (Dowling-Meara) had an undescribed ultrastructural and immunohistochemical abnormality.
  
  
  OBJECTIVE
  The objective was to clarify the ultrastructural and immunohistochemical abnormalities in EBH to gain further insight into the pathogenesis of this disorder.
  
  
  METHODS
  Tissue from the patient was studied with routine histochemistry, electron microscopy, and immunohistochemistry.
  
  
  RESULTS
  Excessive clumping of tonofilaments on electron microscopic examination, anomalous hemidesmosomes, and immunohistochemical evidence of aberrant keratin expression by basal epidermal cells was found.
  
  
  CONCLUSIONS
  This case of EBH provides further evidence for primary abnormalities involving cytoskeletal-membrane attachment plaque formation in this rare disorder.
mesh_terms: D003896:Desmosomes / Q000648:ultrastructure*; D016110:Epidermolysis Bullosa Simplex / Q000235:genetics / Q000276:immunology / Q000473:pathology*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007382:Intermediate Filaments / Q000648:ultrastructure*; D007633:Keratins / Q000235:genetics; D008854:Microscopy, Electron; D012867:Skin / Q000648:ultrastructure*
chemical_list: D007633:Keratins