A 37-year-old woman presents to AIIMS OPD with a lump in the left breast.Family history is negative for breast cancer. On Examination the mass is rubbery, mobile, and nontender to palpation. No overlying skin changes and the axilla is negative for lymphadenopathy Ultrasound repo suggest a simple 1-cm cyst in the area of the palpable mass in the left breast. Most appropriate management of this patient?

**Core Concept**
The patient presents with a palpable breast mass, which requires a thorough evaluation to determine the most appropriate management strategy. The clinical presentation and ultrasound findings suggest a simple cyst, which is a common benign breast lesion.

**Why the Correct Answer is Right**
The most appropriate management for a simple breast cyst is fine-needle aspiration (FNA). FNA is a minimally invasive procedure that involves inserting a small needle into the cyst to drain its contents. This approach is preferred because it is less likely to cause trauma to the surrounding tissue and can provide a diagnosis of a simple cyst, which is benign in nature. The patient's clinical presentation and ultrasound findings support this approach, as there are no signs of malignancy or infection.

**Why Each Wrong Option is Incorrect**
**Option A:** Surgical excision (lumpectomy or mastectomy) is not the first-line treatment for a simple breast cyst, as it is a more invasive procedure with potential risks and complications.
**Option B:** Core needle biopsy (CNB) may be considered for masses with suspicious ultrasound features or mammographic findings, but it is not necessary for a simple cyst with a clear ultrasound diagnosis.
**Option C:** Ultrasound-guided core needle biopsy is not the most appropriate initial management for a simple breast cyst, as it may cause trauma to the surrounding tissue and is not necessary for a benign diagnosis.

**Clinical Pearl / High-Yield Fact**
If a breast mass is found to be a simple cyst on ultrasound, it is essential to aspirate the cyst to confirm the diagnosis and provide relief for the patient. This approach can also help to rule out more complex cysts or malignancies.

**Correct Answer:** B.

✓ Correct Answer: A. Reassurance and re-examination