Charged with Discharge: A Case-based Review of Nipple Discharge Using the American College of Radiology's Appropriateness Guidelines.

Nipple discharge, a relatively common presenting symptom for women of all ages, may be due to both benign and malignant conditions. Men can also present with nipple discharge, and when they do, they have a higher likelihood of malignancy than women. Radiologists vary in their evaluation of patients with nipple discharge, although the American College of Radiology practice guidelines for nipple discharge provides data-driven appropriate algorithms. In patients with physiologic discharge, imaging is not typically indicated. For those with pathologic nipple discharge, imaging typically starts with diagnostic mammography and retroareolar ultrasound for women over 40 years of age, diagnostic mammogram or ultrasound for women aged 30-39 years, and ultrasound for women younger than 30 years. Finally, contrast-enhanced breast MRI or galactography are usually reserved for identifying the cause of discharge when initial imaging with mammography and ultrasound is unrevealing.

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