When to refer for surgery
No surgical evaluation or intervention is needed for physiologic nipple discharge. As mentioned previously, reassure the patient and recommend appropriate breast cancer screening. In the setting of pathologic discharge, however, referral to a breast surgeon may be indicated after appropriate imaging workup has been done.
Since abnormal imaging almost always results in a recommendation for image-guided biopsy, typically the biopsy is performed prior to the surgical consultation. Once the pathology report from the biopsy is available, the radiologist makes a radiologic-pathologic concordance statement and recommends surgical consultation. This process allows the surgeon to have all the necessary information at the initial visit.
However, in the setting of pathologic nipple discharge with normal breast imaging, the surgeon and patient may opt for close observation or surgery for definitive diagnosis. Surgical options include single-duct excision when nipple discharge is localized to one duct or central duct excision when nipple discharge cannot be localized to one duct.
CASE Continued: Follow-up
The patient was referred to a breast surgeon. Given the extent of disease in the left breast, breast conservation was not possible. The patient underwent left breast simple mastectomy with sentinel lymph node biopsy and prophylactic right simple mastectomy. Final pathology results revealed stage IA IDC with DCIS. Sentinel lymph nodes were negative for malignancy. The patient underwent adjuvant left chest wall radiation, endocrine therapy with tamoxifen, and implant reconstruction. After 2 years of follow-up, she is disease free.
In summary
Nipple discharge can be classified as physiologic or pathologic. For pathologic discharge, a thorough physical examination should be performed with subsequent imaging evaluation. First-line tools, based on patient age, include diagnostic mammography and targeted ultrasonography. Contrast-enhanced MRI is then recommended for negative or equivocal cases. All patients with pathologic nipple discharge should be referred to a breast surgeon following appropriate imaging evaluation. ●