Challenging diagnosis of clear cell hidradenocarcinoma of the female breast: a case report and the role of pre-operative ultrasonography in differentiating the origin of the tumor.

Clear cell hidradenocarcinoma is a rare neoplasm of the breast that can mimic tumors originating from superficial breast tissue. Early recognition of the tumor's origin is essential for guiding appropriate evaluation and treatment. We report a case involving a 75-year-old patient with hidradenocarcinoma of the breast and highlight the utility of preoperative ultrasonography in differentiating the tumor's origin. Due to the limited data available on the nature of this disease, a modified radical mastectomy was performed following a wide excisional biopsy.