PMID- 21270467 OWN - NLM STAT- MEDLINE DCOM- 20110810 LR - 20191210 IS - 1708-8283 (Electronic) IS - 0883-0738 (Linking) VI - 26 IP - 4 DP - 2011 Apr TI - Idiopathic hypersomnia: a report of three adolescent-onset cases in a two-generation family. PG - 522-5 LID - 10.1177/0883073810384865 [doi] AB - Idiopathic hypersomnia is an uncommon sleep disorder characterized by prolonged sleep time and excessive daytime sleepiness without cataplexy. This study concerned a case of familial occurrence. The proband expressed an idiopathic hypersomnia with long sleep time at the age of 12 years. Clinical interview and ad libitum polysomnographic study did not reveal any symptoms of narcolepsy or other sleep disorders. Family history revealed that a 20-year-old sister had experienced symptoms of hypersomnia from the age of 16 and their mother had been diagnosed with idiopathic hypersomnia previously. The diagnosis of idiopathic hypersomnia with long sleep time was confirmed in the sister by clinical interview and ad libitum polysomnography. Human leukocyte antigen (HLA) did not reveal the DQB1-0602 phenotype in the proband and relatives. This report confirms the hypothesis of a genetic predisposition in idiopathic hypersomnia. FAU - Janackova, Sona AU - Janackova S AD - Neuropediatric Unit, University Hospital of Reims, France. sona.janackova@post.cz FAU - Motte, Jacques AU - Motte J FAU - Bakchine, Serge AU - Bakchine S FAU - Sforza, Emilia AU - Sforza E LA - eng PT - Journal Article DEP - 20110126 PL - United States TA - J Child Neurol JT - Journal of child neurology JID - 8606714 SB - IM MH - Adult MH - Age of Onset MH - Child MH - *Family Health MH - Female MH - Humans MH - Idiopathic Hypersomnia/*genetics/immunology/*physiopathology MH - Polysomnography MH - Young Adult EDAT- 2011/01/29 06:00 MHDA- 2011/08/11 06:00 CRDT- 2011/01/29 06:00 PHST- 2011/01/29 06:00 [entrez] PHST- 2011/01/29 06:00 [pubmed] PHST- 2011/08/11 06:00 [medline] AID - 0883073810384865 [pii] AID - 10.1177/0883073810384865 [doi] PST - ppublish SO - J Child Neurol. 2011 Apr;26(4):522-5. doi: 10.1177/0883073810384865. Epub 2011 Jan 26.