Frecuencia de criptorquidia y factores asociados en recién nacidos

objectives: to establish the frequency of abnormalities of testicular descent and associated factors in newborn (nb) boys. methods: an observational clinical study, case control type, was performed. all criptorchydic nb were evaluated at the hospital universitario de los andes, from november 2007 to august 2008. they were compared with 105 nb without cryptorchidism. a survey to obtain data from the patients, and their parents was conducted. results: criptorchidism was present in thirty five out of 2084 male newborns, representing 1.7% of the sample. in preterm nb, the frecuency of criptory was 10.8%, compared to 0.8% frequency observed in at term male newborns. prematurity and low birth weight were associated with increased frequency of chryptorchidism (p<0,05). newborns height, apgar index, and the lenght of their penis, were also associated with increased presence of chryptorchidism. the calculated odds ratio risk for criptorchidism is 5.27 times higher in pre-term nb compared to term boys at birth. the risk for chriptorchidism in a newborns with morphological developmental abnormalities, is 7.03 times higher than in a nb without such abnormalities. conclusions: we have verified that criptorchidism in our children is more frequent in pre-term newborns, and that 1.7% is the frequency of criptorchidism in this sample. low birth weight, prematurity, and the small penis dimensions, together with associated morphological developmental abnormalities, are risk factors related to abnormal testicular descent.