Search on: KLINEFELTER SYNDROME 
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Descriptor English:   Klinefelter Syndrome 
Descriptor Spanish:   Síndrome de Klinefelter 
Descriptor Portuguese:   Síndrome de Klinefelter 
Synonyms English:   48,XXYY Syndrome
49,XXXXY Syndrome
Klinefelter Syndrome, Variants
Klinefelter's Syndrome
XXXY Males
XXY Syndrome
XXY Trisomy
Xxyy Syndrome
Klinefelter Syndromes
Klinefelter Syndromes, Variants
Klinefelters Syndrome
Syndrome, Klinefelter
Syndrome, Klinefelter's
Syndrome, Variants Klinefelter
Syndrome, XXY
Syndrome, Xxyy
Syndromes, Klinefelter
Syndromes, Variants Klinefelter
Syndromes, XXY
Syndromes, Xxyy
Trisomies, XXY
Trisomy, XXY
XXXY Male
XXY Syndromes
XXY Trisomies
Xxyy Syndromes  
Tree Number:   C12.706.316.795.500
C13.351.875.253.795.500
C16.131.260.830.835.500
C16.131.939.316.795.500
C16.320.180.830.835.500
C19.391.119.795.500
C19.391.482.629
Definition English:   A form of male HYPOGONADISM, characterized by the presence of an extra X CHROMOSOME, small TESTES, seminiferous tubule dysgenesis, elevated levels of GONADOTROPINS, low serum TESTOSTERONE, underdeveloped secondary sex characteristics, and male infertility (INFERTILITY, MALE). Patients tend to have long legs and a slim, tall stature. GYNECOMASTIA is present in many of the patients. The classic form has the karyotype 47,XXY. Several karyotype variants include 48,XXYY; 48,XXXY; 49,XXXXY, and mosaic patterns ( 46,XY/47,XXY; 47,XXY/48,XXXY, etc.). 
Indexing Annotation English:   index here karyotypes XXXY, XXXXY, XXYY, XXXYY, XX/XXY, XX/YY, XY/XXY, XXY/XXXY, XXY/XXYY, XY/XXY/XXXY if called KLINEFELTER SYNDROME by author but if not so named by author, index under SEX CHROMOSOME DISORDERS
Allowable Qualifiers English:  
BL blood CF cerebrospinal fluid
CI chemically induced CL classification
CO complications DI diagnosis
DG diagnostic imaging DH diet therapy
DT drug therapy EC economics
EM embryology EN enzymology
EP epidemiology EH ethnology
ET etiology GE genetics
HI history IM immunology
ME metabolism MI microbiology
MO mortality NU nursing
PS parasitology PA pathology
PP physiopathology PC prevention & control
PX psychology RT radiotherapy
RH rehabilitation SU surgery
TH therapy UR urine
VE veterinary VI virology
Record Number:   7889 
Unique Identifier:   D007713 

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