XXXX syndrome
A rare chromosomal disorder that affects females only, caused by the presence of four X chromosomes rather than the normal two. It is characterized by mild to severe mental retardation in most cases, sometimes by physical abnormalities, facial features similar to those seen in Down syndrome, and sterility. Also known as poly-X syndrome.

Medical dictionary. 2011.

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  • 48, XXXX — Infobox Disease Name = XXXX syndrome Caption = DiseasesDB = 32550 ICD10 = ICD10|Q|97|1|q|90 ICD9 = ICDO = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = XXXX syndrome (also called tetrasomy X, quadruple X, or 48, XXXX) is a rare… …   Wikipedia

  • Triple X syndrome — Classification and external resources ICD 10 Q97.0 DiseasesDB 13386 Triple X syndrome is a form of …   Wikipedia

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