FGFR2 and infantile convulsions and choreoathetosis: Accordingly, concomitant molecular assessment of phosphorylated FGFR2 and phosphorylated FRS2α protein expression in tumor tissue by routine methodologies such as IHC analysis could represent a more reliable biomarker, rather than the only genetic testing of FGFR status, to select iCCA patients candidate to FGFR targeted therapies.