**Core Concept**
Palatal hyperplasia, also known as cobblestone papillatosis, is a common condition characterized by the overgrowth of mucosal tissue in response to chronic irritation, typically due to poorly fitting dentures. This condition requires a treatment approach that addresses the underlying cause while minimizing further irritation.

**Why the Correct Answer is Right**
The treatment of choice for palatal hyperplasia involves removing the source of irritation, which in this case is the poorly fitting denture. By adjusting or replacing the denture, the chronic irritation is eliminated, allowing the palatal mucosa to return to its normal state. Laser therapy or surgical excision may also be considered in severe cases, but initial management focuses on correcting the denture fit.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because simply removing the denture without addressing the underlying cause would not prevent recurrence.
**Option B:** This option is incorrect because topical anesthetics may provide temporary relief but do not address the underlying cause of the palatal hyperplasia.
**Option C:** This option is incorrect because corticosteroid injections may provide temporary relief but are not a definitive treatment for palatal hyperplasia.

**Clinical Pearl / High-Yield Fact**
A key aspect of managing palatal hyperplasia is to ensure proper denture fitting to prevent recurrence. This involves regular follow-up appointments with a dentist to monitor the denture fit and make adjustments as needed.

**Correct Answer: C. Corticosteroid injection**