Rare meningeal-derived malignant hemangiopericytoma/solitary fibrous tumor grade II-III presenting as a subcutaneous mass on the scalp - Gabriella Vasile, DO; Christopher Mancuso, DO, MHS; Rachel White, DO; Andrew J. Hanly, MD; Matthew Moore, MD; Richard Rubenstein, MD; Brad Glick, DO, MPH, FAOCD (Elsevier, 2020)