Figure 3 Pathological features of FH mutation ULMs. It displayed well circumscribed, fascicular tumors with increased cellularity, nuclear atypia, and occasional mitoses. A: Staghorn vessels at 40× original magnification; B: Fibrillary cytoplasm at 100× original magnification; C: Eosinophilic globules at 400× original magnification; D: IHC by 2SC staining positive at 100× original magnification.