A 2-year-old child presents with a bluish, dome-shaped swelling on the inner aspect of the lip. What is the most likely diagnosis?

Explanation

The bluish, dome-shaped swelling on the inner lip of a young child is typically a mucocoele, which is a mucous-filled cyst resulting from blocked salivary glands. Hematomas are localized blood collections usually caused by trauma, and hemangiomas are benign vascular tumors but have a different appearance.