RESUMEN
A solitary fibrous tumour (SFT) is a rare tumour that originates from the mesenchyme and arises mainly in the pleura. In this report, we present a rare case of a 77-year-old man with a SFT in the left nasal cavity. On CT and MRI, a large mass is seen in the left nasal cavity, extending to the choana. The mass was radically resected via functional endoscopic sinus surgery (FESS). Histological examination showed a fibroblastic mesenchymal tumour with a prominent hemangiopericytic vascular branching pattern that stained diffusely positive for the immunohistochemical markers CD34, Bcl-2, and CD99, which was compatible with the histopathological diagnosis of a SFT. Imaging and histological features are discussed, along with the reports in literature, clinical management, and follow-up of this pathology.