"Solitary fibrous tumour usually present as a solitary well-circumscribed ovoid mass located in intraconal and extraconal spaces of the orbit, lacrimal gland, lacrimal sac, and eyelid. They are more commonly found in the cranial half of the orbit8."
"T1: homogeneous isointense signal intensity typically similar to cerebral cortex or muscle"
"T2:"
"T1 C+: diffuse heterogeneous vivid contrast enhancement seen on post-contrast images"
"Solitary fibrous tumours are also immune-reactive for vimentin and B-cell lymphoma 2 (BCL2) but negative for keratin, cytokeratin, epithelial membrane antigen, S-100 protein, smooth muscle actin, factor VIII-related antigen, and Desmin."