**Core Concept**
The patient's presentation is suggestive of a hydrocele, a fluid accumulation in the tunica vaginalis of the testis, which may be congenital or acquired. The clinical feature of fluctuation and the ability of the surgeon to get above the swelling are characteristic of a hydrocele.

**Why the Correct Answer is Right**
A hydrocele is typically managed conservatively, and surgical intervention is usually reserved for cases where there is significant discomfort or cosmetic concerns. The correct approach involves observation, and the decision to operate should be based on the patient's symptoms and quality of life. This approach is in line with the principle of "watchful waiting" for hydroceles.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it implies immediate surgical intervention, which is not typically recommended for hydroceles unless there are specific indications.

**Option B:** This option is incorrect as it suggests a more aggressive approach than necessary for a hydrocele. However, it is worth noting that a hydrocele can be a sign of underlying testicular cancer, and a thorough evaluation is necessary before any treatment is initiated.

**Option C:** This option is incorrect as it implies that the patient requires a specific type of surgery, which may not be necessary for a hydrocele.

**Option D:** This option is incorrect as it suggests that the patient requires a specific type of imaging study, which may not be necessary for a hydrocele.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that a hydrocele can be a sign of underlying testicular cancer, and a thorough evaluation, including a testicular ultrasound, is necessary before any treatment is initiated.

**Correct Answer:** A.