Fig 5. 5-ALA accumulation in GIST in vivo.

Flank tumor models were administered with 300 mg/kg 5-ALA via the tail vein. Four hours after 5-ALA administration, the spectral waveforms of normal skin tissue (blue line) and GIST (red line) were examined using a VLD-M1 spectrometer. A peak of fluorescence emission was observed at 635 nm, corresponding to PpIX.