Our investigation has confirmed the low incidence of mammarian pathology in adolescents and the near absence of malignant neoplastic pathology. Programs of breast control in this age can be valid only by aiming at health education prevention and correction of eventual risk factors. The group of adolescents studied by us has allowed us to define the most frequent pathology as the functional one, that is, mastodinia, and among the organic cases single or multiple fibroadenomas are the most frequent lesions. An exact diagnostic profile is necessary in order to reassure the patient in cases of absence of pathology, or to schedule a follow-up or to program an eventual surgical and/or medical treatment.