CD99 and solitary fibrous tumor: Bcl2, CD34, and CD99 immunohistochemical staining are commonly used in SFT but are variable in intensity and distribution.3,8,9 The positivity ranges for CD99, CD34, and Bcl2 in SFT cases are 57.1%–80%, 80%–92.9%, and 70%–86%, respectively.8,9