Solitary Fibrous Tumor Presenting as a Parapharyngeal Mass

Abstract

Solitary fibrous tumors (SFT) rarely occur in the neck region and can be easily mistaken for more common tumors if the index of suspicion is not high. They are characterized by remarkable histologic variability. However, immunopositivity for CD34 and Bcl2 with immunonegativity for other markers aid in establishing the diagnosis. Distinction from the other common benign entities is essential, as SFT are tumors of low grade aggressiveness and unpredictable biologic behavior. Complete resection is the key feature determining outcome.