**Question:** Tubular (Canalicular) adenoma occurs on:

Core Concept:
Tubular adenomas are benign tumors that develop within the ducts of the salivary glands, specifically the salivary acini and ducts. These tumors are also known as canalicular adenomas due to their location along the intra-acinar ductal system. They are rare tumors with an estimated incidence of around 0.5-1.0% of all salivary gland tumors.

Why the Correct Answer is Right:
Tubular adenomas are benign tumors originating from the ductal cells, which are responsible for the secretion and transport of saliva. They are named "canalicular adenomas" because they occur along the intra-acinar ductal system. The correct answer C refers to the location of these tumors within the salivary glands.

Why Each Wrong Option is Incorrect:
A) Salivary gland tumors can occur in the major salivary glands (parotid, submandibular, and sublingual), but they are not specific to the minor salivary glands (which are responsible for producing most of the saliva).
B) Mucocele is a benign cystic swelling caused by a dilation of the salivary ducts due to obstruction, not a tumor.
D) Mucoepidermoid carcinoma is a malignant tumor, not a benign tumor like tubular adenomas.

Clinical Pearl:
Tubular adenomas are a rare entity, but they should be considered in the differential diagnosis when evaluating salivary gland swelling, especially in the minor salivary glands. Since these tumors are benign, they generally do not require surgical intervention unless they cause symptoms or obstruct the salivary duct. In such cases, the treatment involves removing the affected gland or duct.