title: Features of severe periodontal disease in a teenager with Chédiak-Higashi syndrome.
abstract: BACKGROUND
  Chédiak-Higashi syndrome (C-HS) is a rare congenital disease characterized by defective neutrophil function with abnormal lysosomal inclusions, neutropenia, and reduced chemotaxis. The complete syndrome includes oculocutaneous albinism with photophobia, neurologic features, recurrent infections, and enterocolitis.
  
  
  METHODS
  A 14-year-old male C-HS patient was referred to us because of serious periodontal destruction with acute inflamed gingiva and ulcers. Clinical and biological investigations were performed, leading to the diagnosis of C-HS.
  
  
  RESULTS
  Laboratory findings included neutropenia and hypergammaglobulinemia. Peripheral blood smears showed giant granules in neutrophils, eosinophils, and granulocytes. Bone marrow smears showed giant inclusions in leukocyte precursor cells. These granules and inclusions were characteristic of Chédiak-Higashi syndrome. Oral radiographic status showed extensive loss of alveolar bone leading, in most cases, to tooth exfoliation. Bacteria often associated with periodontitis were detected in subgingival plaque samples, including Fusobacterium nucleatum, Campylobacter rectus, Prevotella melaninogenica, Peptostreptococcus anaerobius, and Clostridium sp. Biopsies of periodontal tissues for light and electronic microscopic examinations revealed massive bacterial invasion of the epithelial tissue, epithelial cells, and connective tissue. Ultrastructural observations of periodontal polymorphonuclear leukocytes showed defective granulation, with abnormal granules not discharging their lysosomal content against engulfed bacteria. Viable dividing bacteria were found in the cytoplasm.
  
  
  CONCLUSIONS
  In this case, early-onset periodontitis seems to be the expression of C-HS granulocyte deficiency. Periodontal treatment of these patients is often unsuccessful. This case report illustrates the importance of the dentist in initiating clinical and biological investigations in such early aggressive periodontitis in young patients.
authors.affiliation: Faculté d'Odontologie, Département de Parodontologie, Université Lille, France. edelcourt@univ.lille2.fr
authors.forename: E M
authors.initials: EM
authors.lastname: Delcourt-Debruyne
authors.forename: H R
authors.initials: HR
authors.lastname: Boutigny
authors.forename: H F
authors.initials: HF
authors.lastname: Hildebrand
mesh_terms: D000293:Adolescent; D010520:Aggressive Periodontitis / Q000097:blood / Q000209:etiology* / Q000473:pathology; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology; D002609:Chediak-Higashi Syndrome / Q000097:blood / Q000150:complications* / Q000473:pathology; D003773:Dental Plaque / Q000382:microbiology; D018450:Disease Progression; D006098:Granulocytes / Q000502:physiology; D006801:Humans; D008297:Male; D009504:Neutrophils / Q000502:physiology; D011859:Radiography