Commonest site for ectopic salivary gland tumour is –
**Core Concept**
Ectopic salivary gland tumors arise from salivary gland tissue that is located outside of the major salivary glands. These tumors can occur in various locations, but some sites are more common than others.
**Why the Correct Answer is Right**
The commonest site for ectopic salivary gland tumors is the palate, specifically the minor salivary glands. This is because the minor salivary glands are dispersed throughout the mucosa of the oral cavity, including the palate, and are more prone to neoplastic transformation. The palatal minor salivary glands are thought to be the most common site due to their high density and exposure to potential carcinogens.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while salivary gland tumors can occur in the tongue, it is not the most common site for ectopic salivary gland tumors.
**Option B:** This option is incorrect because the submandibular gland is a major salivary gland, and ectopic salivary gland tumors typically arise from minor salivary glands.
**Option C:** This option is incorrect because while salivary gland tumors can occur in the parotid gland, it is a major salivary gland and not the most common site for ectopic salivary gland tumors.
**Clinical Pearl / High-Yield Fact**
When considering a diagnosis of a salivary gland tumor, it is essential to evaluate the location and size of the tumor, as well as the patient's symptoms and medical history. The most common sites for salivary gland tumors are the parotid gland, submandibular gland, and palate.
**Correct Answer: C. Parotid gland**