A 29-year-old lady presents with a history of discharge from the nipple of the left breast since 1 month duration. Which one of the following is not warranted in the initial assessment of this patient?
Histo/Cytopathology
The correct answer, that is the test not warranted initially, is histo/cytopathology. Nipple discharge in a 29-year-old woman is usually benign, the commonest causes being duct ectasia, periductal mastitis, intraductal papilloma and fibrocystic change, with drug-induced or prolactinoma-related galactorrhoea also considered. Initial assessment is history and clinical examination followed by imaging. Tissue sampling is not a routine first step: it is reserved for a discrete lump or a suspicious imaging finding, and is then a core biopsy of the lesion, since discharge cytology has poor sensitivity and a negative result cannot exclude carcinoma.
Clinical examination is mandatory in every breast complaint and is the first arm of triple assessment. Ultrasonography is the imaging of choice under 35-40 years because dense breast tissue limits mammographic sensitivity, and it shows dilated ducts and papillary lesions well. Mammography is still legitimately used in pathological discharge to exclude an underlying malignancy or suspicious microcalcification.
Key point: Work up nipple discharge with examination plus imaging first, adding pathology only if findings are suspicious. Red flags are unilateral, single-duct, spontaneous, blood-stained discharge with a mass.