Table 1.

List of antibodies investigated, dilutions and antigen retrieval methods applied in the immunohistochemical analysis.

Antibody	Clonality	Manufacturer	Dilution	Antigen retrieval
Cytokeratin	Clone AE1/AE3	Invitrogen®, Thermo Fisher Scientific®	1/200	Water bath/20 min
Vimentin	Clone V9	DAKO®, Agilent Technologies®	1/1200	Water bath/20 min
CD31	Clone JC70A	DAKO®, Agilent Technologies®	1/200	Pepsine
Synaptophysin	Clone SP11	Thermo Fisher Scientific®	1/100	Water bath/20 min
c-Kit	Polyclonal	DAKO®, Agilent Technologies®	1/450	Water bath/20 min
GFAP	Polyclonal	Millipore®	1/2000	Water bath/20 min