Paget's disease of the breast is a rare cutaneous manifestation of breast cancer which has a better prognosis when detected early. We report the case of a 56 year-old woman who attended consultation in primary care in the city of Cali to evaluate the result of uterine cervical cytology. She underwent preventive breast exam and a descamative erythematous nipple-areola lesion of two years of evolution was found. Pathological and immunotyping studies confirmed Paget's disease. The histological report of the surgical specimen removed during lumpectomy with resection of the nipple-areola complex, diagnosed an underlying intraductal carcinoma. The use of the clinical method in primary care in a patient without palpable lesion and malignancy negative mammograms, was the key to success in early detection and recovery of the patient who has performed well. (Acta Med Colomb 2013; 38: 277-281).