We conducted a comparative study. Data were collected from a sample of 38 residents in their 1st to 4th year of residency. The sample was separated into a control group and an experimental group, depending on whether they had been trained in our breast pathology department. Our results indicate a significant benefit from training in a breast pathology department. This was characterized by a significant improvement in overall mastery and autonomy. Conversely, we did not observe any significant difference in feelings of stress. Specific knowledge of breast pathology was judged to be more satisfactory among residents who had completed specialized internships. Eight students completed the satisfaction questionnaire. Six were generally satisfied with their time on the ward. The other 2 were less satisfied. Sixty-seven percent of students in the experimental group were satisfied with the supervision of their internship, compared with 40% in the control group.