The karyotype 49,XXXXY is a rare form of Klinefelter's syndrome, Vario
us anomalies can be found in this variant - more than other variants o
f Klinefelter's syndrome, Cleft palate is rarely seen among these anom
alies. A cleft palate deformity can be diagnosed early and easily. Thi
s deformity should cause one to suspect an uncommon variant of Klinefe
lter's syndrome. Here we present a patient with an uncommon variant of
Klinefelter's syndrome who was diagnosed with the help of the presenc
e of an incomplete cleft palate deformity.