STAT6 and solitary fibrous tumor: In 2016, the World Health Organization (WHO) introduced the combined term “solitary fibrous tumor/hemangiopericytoma” for describing connective tissue tumors of the central nervous system with positive STAT6 nuclear immunostaining, which was replaced by “solitary fibrous tumors” (SFT) alone in 2021, to conform fully with soft tissue pathology nomenclature [1].