- The second most frequent salivary gland tumour after pleomorphic adenoma, Warthin's tumour is also known as adenolymphoma, cystadenolymphoma, and papillary cystadenoma lymphomatosum. It often develops from the parotid gland and makes up between 4% and 13% of all salivary gland tumours. With relative rates of 6.9% and8%, extraparotid Warthin tumours from the submandibular gland and cervical lymph nodes are extremely uncommon. Moreover, Warthins tumours that originate in the minor salivary gland are incredibly uncommon, with documented incidences ranging from 0.1% to 1.2%. Several cysts with numerous papillae are visible in Warthin's tumour, which is covered in bilayered columnar and basaloid oncocytic epithelium. They typically appear as slowly expanding, painless masses that emerge from the parotid gland's tail, although they can also infrequently appear as quickly expanding, painful lesions. We describe a rare instance of a 6-month-old asymptomatic Warthin's tumour in a 55-year-old male patient's left submandibular gland. Warthins tumour, extra parotid, and submandibular gland are important terms.