Delayed Diagnosis: Breast Malignancy Camouflaged by Hamartoma

Breast hamartomas are rare benign masses composed of glandular, adipose and fibrous tissue. While it is not uncommon to see ductal hyperplasia, apocrine metaplasia or adenosis in hamartomas, rare case reports of coexistent lobular or ductal intraepithelial neoplasms and in situ carcinomas have been reported in these lesions. Imaging with ultrasound and mammography was undertaken for a patient who presented with complaints of right breast pain. Right breast malignancy was detected on mammography, and guided biopsy using USG was undertaken from the same lesion. Triple-positive right breast malignancy was detected. This case highlighted the rare occurrence of a malignancy coexisting with a fairly large breast hamartoma.