Scanty or little Gb3 accumulation of the two patients who had received ERT. The figures showed the endomyocardial histologic examination of the patients (No. 16 and 17) who had received ERT for more than 3 years. Patient No. 17 showed no Gb3 accumulation with H&E staining (A), toluidine blue staining (B), and electron microscope exam (C). Patient No. 16 still showed scanty vacuolization (arrow) with H&E staining (D), Gb3 accumulation (arrow) with Toluidine blue staining (E), and myelin bodies (arrow) in electron microscope exam (F).