title: Characteristics of hemophagocytic lymphohistiocytosis in neonates: a nationwide survey in Japan.
abstract: OBJECTIVE
  To assess the etiology, prognosis, and appropriate treatment of hemophagocytic lymphohistiocytosis (HLH) in neonates.
  
  
  METHODS
  We collected information on neonates in whom HLH was diagnosed between 1997 and 2007 from participating members of the Japanese Society of Pediatric Hematology.
  
  
  RESULTS
  HLH was diagnosed in 20 patients within 4 weeks after birth. Of the diagnostic criteria for HLH-2004, the incidence of fever was quite low in preterm infants, and hypertriglyceridemia and neutropenia were uncommon. Familial HLH (n = 6) or severe combined immunodeficiency-associated HLH (n = 1) was diagnosed in 7 patients, and 2 of them have survived. Herpes simplex virus-associated HLH was diagnosed in 6 patients, and 2 of them have survived. The overall survival rate for the 20 patients was 40%.
  
  
  CONCLUSIONS
  HLH is rare in neonates and has a poor prognosis. Early diagnosis and immediate treatment are required when considering the possibility of herpes simplex virus-associated or familial HLH.
authors.affiliation: Department of Pediatrics, Sapporo Medical University School of Medicine, Sapporo, Japan. nsuzuki@sapmed.ac.jp
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Suzuki
authors.forename: Akira
authors.initials: A
authors.lastname: Morimoto
authors.forename: Shouichi
authors.initials: S
authors.lastname: Ohga
authors.forename: Kazuko
authors.initials: K
authors.lastname: Kudo
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Ishida
authors.forename: Eiichi
authors.initials: E
authors.lastname: Ishii
mesh_terms: D000212:Acyclovir / Q000627:therapeutic use; D000305:Adrenal Cortex Hormones / Q000627:therapeutic use; D000972:Antineoplastic Agents, Phytogenic / Q000627:therapeutic use; D000998:Antiviral Agents / Q000627:therapeutic use; D003244:Consciousness Disorders / Q000453:epidemiology; D016572:Cyclosporine / Q000627:therapeutic use; D004890:Erythema / Q000453:epidemiology; D005047:Etoposide / Q000627:therapeutic use; D005076:Exanthema / Q000453:epidemiology; D005260:Female; D005316:Fetal Distress / Q000453:epidemiology; D005334:Fever / Q000453:epidemiology; D018380:Hematopoietic Stem Cell Transplantation; D006561:Herpes Simplex / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology; D006801:Humans; D007155:Immunologic Factors / Q000627:therapeutic use; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D007231:Infant, Newborn; D007234:Infant, Premature; D007564:Japan; D007770:L-Lactate Dehydrogenase / Q000097:blood; D007964:Leukocytosis / Q000453:epidemiology; D051359:Lymphohistiocytosis, Hemophagocytic / Q000175:diagnosis* / Q000401:mortality* / Q000628:therapy; D008297:Male; D015835:Ocular Motility Disorders / Q000453:epidemiology; D010951:Plasma Exchange; D011379:Prognosis; D012127:Respiratory Distress Syndrome, Newborn / Q000453:epidemiology; D012640:Seizures / Q000453:epidemiology; D016511:Severe Combined Immunodeficiency / Q000175:diagnosis / Q000453:epidemiology; D001613:beta 2-Microglobulin / Q000652:urine; D005719:gamma-Globulins / Q000627:therapeutic use
chemical_list: D000305:Adrenal Cortex Hormones; D000972:Antineoplastic Agents, Phytogenic; D000998:Antiviral Agents; D007155:Immunologic Factors; D007166:Immunosuppressive Agents; D001613:beta 2-Microglobulin; D005719:gamma-Globulins; D005047:Etoposide; D016572:Cyclosporine; D007770:L-Lactate Dehydrogenase; D000212:Acyclovir