Since previous IHC experiments led us to suspect a different histological appearance between these two forms of the tumor, we decided to perform ad hoc Haematoxylin and Eosin staining on GCT and GCT/PDB tumor biopsies, bearing the most frequent H3F3A (p.Gly34Trp) and ZNF687 (p.Pro937Arg) mutations, respectively. Here, ZNF687 is linked to granular cell tumor.