Fig. 3: Classic pattern of immunostains is characterized by a focal and patchy expression of S100 protein, CD34 staining of neoplastic cells and extracellular matrix, diffuse nuclear expression of SOX9 and ERG.
From: Recurrent novel THBS1-ADGRF5 gene fusion in a new tumor subtype “Acral FibroChondroMyxoid Tumors”

ERG intensity is decreased in comparison with endothelium.