Juvenile fibroadenoma and granular cell tumor of the breast in an adolescent.

We describe a case of a 15-year-old girl who presented with 2 painful masses in her right breast. Ultrasound confirmed the presence of 2 lesions, both of which appeared noncharacteristic for fibroadenomas. Both lesions were surgically resected. One was found to be a fibroadenoma and the other a granular cell tumor, both benign upon further histologic evaluation. Breast masses are rare in the pediatric population. The finding of a concurrent fibroadenoma and granular cell tumor is unique and has not been previously reported. Granular cell tumors of the breast are relatively uncommon. Often, they are mistaken for a breast malignancy. The concerning clinical and radiographic findings in this patient warranted operative excision.