Unexpected Diagnosis of a Solitary Fibrous Tumour Originating from the Lingual Alveolar Mucosa - A Case Report

Introduction: Extra pleural Solitary fibrous tumours are rare. In the oral cavity they are mainly seen in the buccal mucosa. Clinical diagnosis is often challenging, as they resemble other neoplasms in the oral cavity with no specific clinical features. Usually the diagnosis is made from the histopathological features, following the excision of the lesion and confirmed by immunohistochemistry analysis. As histopathological features are not specific for SFTs immunohistochemistry plays a major role in the final diagnosis of this tumour.<br /> Case Presentation: We present a case report on a 36-year-old male patient who presented with an asymptomatic submucosal lump originating from the lingual alveolar mucosa on the anterior mandible, which is a rare site for SFTs in the oral cavity. Diagnosis of this lesion was confirmed following the excisional biopsy which showed features of SFT in the histology with strong immunohistochemistry positivity for CD34, Vimentin and STATE (nuclear).