these results indicate that in this particular tumor system the neoplastic cell per se plays only a minor role in porphyrin localization and , as a consequence , can not be readily killed upon photoirradiation , suggesting that rapid cytocidal effects , due solely to porphyrin contained within the cell , probably do not occur among the majority of parenchymal cells during in vivo photoirradiation .
C0027651
tumor
C0597032
neoplastic cell