Cytogenetic evaluation of 163 azoospermics.
A constitutional chromosomal aberration was diagnosed in 38/163 (23.3%) azoospermic patients. Whereas the 47,XXY complement was the commonest (31/38 cases), the following abnormal karyotypes were also found: 46,XX; 46,X,del(Y) (q11); 46,X,r(Y); 46,XY,inv(1) (p3500q21.3)mat; and 46,Y,t(X;3) (q26;q13.2)mat (both the deleted and the annular Y were observed twice). Pooled data from the literature showed that the frequency of chromosomal abnormalities is higher in azoospermic (150.4/1000) than in infertile (55.3/1000) males, which in turn is higher than in newborns (less than 6/1000). The observed different frequency between azoospermic and infertile individuals is given by several types of chromosomal abnormalities, mainly by the complement 47,XXY. The analysis also showed that the male infertility secondary to rob translocations and supernumerary marker chromosomes is usually not related to azoospermia. The contrary occurs in certain rcp and gonosome;autosome translocations and in autosome inversions.
Rivas
F
F
División de Genética, Unidad de Investigación Biomédica, Jalisco, Mexico.
Garcia-Esquivel
L
L
Diaz
M
M
Rivera
H
H
Cantu
J M
JM
D000328:Adult; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male; D009845:Oligospermia / Q000235:genetics*