Okay, let's tackle this question. The patient is a 60-year-old woman with blood-stained nipple discharge and a family history of breast cancer. The next best step is being asked. First, I need to recall the standard diagnostic approach for such cases.

Blood-stained nipple discharge can be a sign of various conditions, from benign to malignant. The presence of a family history of breast cancer adds concern for malignancy. The key here is to determine the cause. Common causes include ductal papilloma (benign), intraductal carcinoma, or other benign conditions like fibrocystic changes.

The next step in managing a patient with these symptoms would typically involve imaging to assess the breast tissue. Mammography is often the first-line imaging modality for evaluating breast abnormalities, especially in older women. However, if there's a palpable mass or if the discharge is focal, an ultrasound might be used first. But given that the discharge is blood-stained and there's a family history, mammography is more likely to be the next step.

Wait, but sometimes ductal lavage or galactography might be considered. However, in standard practice, the initial step is usually mammography. If there's a non-mass lesion, then a galactogram (ductogram) might be done to visualize the ductal system. But the first step is imaging.

The options aren't listed, but the correct answer is likely mammography. The other options might include MRI, biopsy, or others. Let me think: MRI is more sensitive but not first-line for initial evaluation. Biopsy would come after imaging if a lesion is found. So the next best step is mammography.

Now, the possible incorrect options could be things like fine needle aspiration (FNAC), which is not typically the first step here. Or maybe a breast ultrasound. But in the presence of blood-stained discharge, mammography is more specific. Alternatively, a ductogram might be a distractor. But the question is about the next best step.

So, the core concept here is the diagnostic approach to a patient with bloody nipple discharge and family history of breast cancer. The next step is imaging, specifically mammography. The clinical pearl would be to remember that blood-stained discharge in older women is concerning and warrants imaging to rule out ductal carcinoma in situ (DCIS) or other malignancies.

**Core Concept**
Nipple discharge, especially bloody, in postmenopausal women with a family history of breast cancer requires prompt evaluation for ductal carcinoma in situ (DCIS) or invasive breast cancer. Diagnostic imaging is the cornerstone to identify intraductal lesions.

**Why the Correct Answer is Right**
Mammography is the next best step to detect microcalcifications or architectural distortions in the ductal system, which are classic signs of DCIS. Blood-stained discharge in older women is highly suspicious for malignancy, and mammography is sensitive for calcifications often seen in DCIS. It also helps localize the affected duct for targeted biopsy if needed.

**Why Each Wrong Option is Incorrect**
**Option A:** Ultrasound is less sensitive for non-palpable lesions and calcifications, which are critical in this scenario.
**Option B:** MRI is not first-line for initial evaluation due to high cost and limited specificity for localized ductal pathology.
**Option D:** Fine-

✓ Correct Answer: D. MRI