Abstract
RATIONALE
Breast cancer (BC) is a common malignant tumor with a poor prognosis that requires early treatment. Invasive ductal BC with focal mucinous differentiation in a 38-year-old woman is rarely reported.
PATIENT CONCERNS
A 38-year-old woman presented to our clinic 3 months after discovering a breast mass that had increased in size during this period. Enhanced computed tomography showed an irregular mass with lobulated edges and burrs at the 9 o'clock position on the patient's right breast. An early enhanced scan showed significant heterogeneous enhancement with continuous enhancement.
DIAGNOSES
The patient's postoperative pathology suggested that the patient had an infiltrating ductal BC with focal mucinous differentiation.
INTERVENTIONS
The patient underwent right breast mass resection first. After the pathological diagnosis was confirmed, the patient underwent right breast resection and right axillary lymph node dissection.
OUTCOMES
The patient's postoperative recovery was good. To date, the patient has not experienced any symptoms of recurrence.
LESSONS
Owing to the poor prognosis of BC, patients with abnormal breast masses should be diagnosed and treated as soon as possible. Further prognosis research on the invasive ductal carcinoma with focal mucinous differentiation occurring in young individuals is warranted.