**Core Concept**
Ductal ectasia is a condition characterized by the dilation of the milk ducts in the breast, often associated with symptoms such as nipple discharge, pain, and inflammation. The condition is typically managed conservatively, but in severe cases, surgical intervention may be necessary.

**Why the Correct Answer is Right**
The surgical management of ductal ectasia may involve duct excision or ductal surgery, which aims to remove the affected ducts and alleviate symptoms. This procedure may be performed under local or general anesthesia, depending on the extent of the surgery and the patient's overall health. The goal of surgery is to eliminate the source of symptoms and prevent further complications, such as recurrent infections or abscesses.

**Why Each Wrong Option is Incorrect**
**Option A:** Mastectomy is an overly aggressive approach for ductal ectasia and is typically reserved for more extensive breast pathology. Ductal ectasia is a localized condition, and mastectomy would result in unnecessary tissue removal and potential long-term consequences.
**Option B:** Conservative management is the primary approach for ductal ectasia, with surgery reserved for severe cases. While conservative management may involve antibiotic therapy or symptom management, surgery is not typically the first line of treatment.
**Option C:** Lumpectomy may be considered for ductal ectasia, but it is not the most appropriate surgical option. Lumpectomy involves the removal of a small portion of breast tissue, whereas ductal surgery is more targeted and aims to remove the affected ducts.

**Clinical Pearl / High-Yield Fact**
When managing ductal ectasia, it is essential to consider the patient's symptoms, breast anatomy, and potential surgical risks. A thorough preoperative evaluation and discussion with the patient regarding the benefits and risks of surgery are crucial to ensure optimal outcomes.

**Correct Answer: D. Ductal surgery**