Scarce clinical manifestations of prolactin-secreting pituitary tumors in children and adolescents make it difficult to timely diagnosis. Girls have more prevalence of microprolactinomas, manifests as a rule, menstrual irregularities. In males, the greater incidence of macroadenomas results in the presence of neuroophthalmologic signs. The diagnosis of prolactinomas requires both radiographic evidence of pituitary adenoma and laboratory analysis of sustained hyperprolactinemia.