Breast Carcinoma Arising in Fibroadenoma in a 15-Year-Old Girl; Diagnosis and Treatment Challenge

Abstract

Breast cancer in adolescents occurring in fibroadenomas is extremely rare. We report a case of right breast cancer in a 15-year-old female student diagnosed in 2020. This is the youngest reported case of breast cancer arising within fibroadenomas in the literature. The teenager has no personal or family history of cancer or known hereditary disease. Currently, there is no consensus on the management of breast cancer arising from adenofibromas in adolescents. Clinically, the tumor was inflammatory with axillary lymph node involvement (T4dN1M0). The fine-needle aspiration cytologic was suspicious of malignancy. The patient received four courses of neoadjuvant chemotherapy with 5-fluorouracil®, doxorubicin® and cyclosphosphamide®, followed by radical right mastectomy. The histological result of the surgical specimen is a non-specific carcinoma with a therapeutic effect greater than fifty percent. The patient received three courses of adjuvant chemotherapy with paclitaxel®. The adolescent underwent radiation therapy at her chest wall of 50 Gy and regional lymph node of 46 Gy. After radiotherapy, hormone therapy with Tamoxifene® at 20 mg per day was started. At 16 months from radiotherapy, there is no recurrence. The reconstruction of the right breast is planned in a few months.