Mucinous carcinoma of breast in a 30-year-old female: A rare case report and discussion

Mucinous carcinoma (MC) (colloid carcinoma) is a particular, rare type of breast carcinoma. It is characterized by the presence of extracellular mucin. MC of the breast generally presents as a lobulated, moderately well-circumscribed mass on mammography, sonography, and magnetic resonance imaging. It has a favorable prognosis due to the low incidence of axillary lymph node metastasis and poor adherence to bottom fascia and poor infiltration of overlying skin. It has high incidence of estrogen receptor and progesterone receptor positivity. The incidence of MC in females under 35 years of age is only 1%. Here, we report a case of MC of right breast in a 30-year-old female.