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Washington University Experience | NEOPLASMS (MESENCHYMAL, NON-MENINGOTHELIAL) | Solitary Fibrous Tumor (SFT) | 2A1 Hemangiopericytoma, anaplastic (WHO III, Case 2) H&E 4
Case 2 History ---- The patient was a 69 year old woman with two-week history of frequent falls. MRI showed a 4.5 x 3.2 x 3.8 cm heterogeneously enhancing mass in the left occipital region with associated vasogenic edema. Operative procedure: Left occipital craniotomy for tumor resection. ---- 2A1-4 Routine H&E stains show a dural-based hypercellular neoplasm. The tumor cells have hyperchromatic nuclei, irregular nuclear contours, frequent prominent nucleoli, and moderate amounts of eosinophilic to focally clear cytoplasm. There are many dilated, thin-walled vessels, including some with a staghorn pattern. A few scattered microcysts are also seen. Mitotic activity reaches 21 mitoses/10HPF. Necrosis is not appreciated.
