Incidentally Detected Mixed Type Mucinous Carcinoma of the Breast in an Asymptomatic 79 Year Old Female

Mucinous carcinoma is a rarely occurring form of breast cancer that exists in two forms, pure and mixed. Differentiation between these is based on the amount of extracellular mucin in the tumor. This malignancy has a more favorable prognosis when compared to other forms of breast cancer, however diagnosis can be challenging as the imaging findings may not be suggestive of breast cancer. Because of a high mucin content these tumors can demonstrate findings associated with benign entities such as enhanced through transmission on ultrasound and high T2 signal on MRI. This report describes the incidental diagnosis of a case of mixed type mucinous carcinoma in an asymptomatic elderly female.