Sublingual Space Schwannoma: An Uncommon Tumour in a Unique Anatomical Location.

A Schwannoma is a benign tumour originating from Schwann cells within the peripheral, cranial, or autonomic nerves. Typically, these tumours manifest as a solitary, slow-growing mass with smooth surface, usually devoid of significant symptoms. Schwannomas most frequently appear in individuals aged 30-50 years. Although they are relatively uncommon, approximately one-fourth of all Schwannomas are found in the head and neck area. Its occurrence within the oral cavity, with the tongue being the most common site, followed by the palate, floor of the mouth, buccal mucosa, lips, and jaws. Diagnosing these tumours before surgery can be challenging, and in most instances, a definitive diagnosis can only be established through surgical intervention and subsequent histological examination. Immunohistochemistry plays a crucial role in confirming the diagnosis, as it shows that Schwannoma cells exhibit a positive reaction to the S-100 protein. Here, we present a case of a Schwannoma in the floor of the mouth, observed in an 18-year-old male patient.