CD34 and hemangiopericytoma: Differential diagnosis of STF includes localization to the pleura for mesotheliomas, to the brain for dural-based meningiomas or hemangiopericytomas, to the abdomen for interstitialomas, and to the kidney for angiomyolipomas, and so on.29–31 Diagnoses should be considered along with evidence from CT and MRI, histopathological findings, and CD34 immunoreactivity data.