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Question

Difficulty: EasyBreast Disorders

Match each characteristic presentation of nipple discharge to its most likely underlying etiology.

  • Spontaneous, unilateral, bloody discharge from a single duct with no palpable breast massIntraductal papilloma
  • Bilateral, milky discharge in a non-pregnant woman presenting with recent-onset amenorrheaHyperprolactinemia
  • Unilateral, purulent discharge associated with tender periareolar inflammation in a patient with a heavy smoking historyPeriductal mastitis
  • Bilateral, multi-ductal, greenish-brown sticky discharge in an asymptomatic perimenopausal womanMammary duct ectasia

Answer

The correct matches pair the specific color, laterality, and associated symptoms of the nipple discharge with their classic etiologies: bloody with intraductal papilloma; milky with hyperprolactinemia; purulent/smoker with periductal mastitis; and greenish-sticky with mammary duct ectasia.
Correctly identifying the underlying cause of nipple discharge requires recognizing classic clinical patterns. Bloody, unilateral discharge from a single duct is the hallmark of an intraductal papilloma. Milky, bilateral discharge in a non-pregnant woman indicates galactorrhea, driven by hyperprolactinemia. Purulent discharge accompanied by inflammatory signs in a smoker is highly specific for periductal mastitis. Finally, multicolored, sticky discharge in an older woman is characteristic of benign mammary duct ectasia.

Step-by-Step Solution

1
Evaluate the patient with unilateral, bloody discharge.
Matches with intraductal papilloma.
This is the classic presentation for a benign papilloma growing in and irritating a single milk duct.
2
Evaluate the patient with bilateral, milky discharge and amenorrhea.
Matches with hyperprolactinemia.
Milky discharge (galactorrhea) is a direct result of elevated prolactin levels, which also suppress the hypothalamic-pituitary-ovarian axis, causing amenorrhea.
3
Evaluate the patient who smokes and has purulent discharge with inflammation.
Matches with periductal mastitis.
Smoking is the primary risk factor for periductal mastitis, leading to ductal damage, obstruction, and subsequent purulent bacterial infection.
4
Evaluate the perimenopausal patient with greenish-brown, sticky discharge.
Matches with mammary duct ectasia.
Duct ectasia is characterized by chronic inflammation and widening of the ducts, which fill with thick, discolored (green/black/brown) secretions.

Key Concept

Evaluation of Nipple Discharge
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Topics

Breast Disorders

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