ALB and neoplasm: The FR-specific in vitro uptake of the radioconjugates into KB tumor cells was demonstrated in vivo, since / in vivo, as pre-injection of excess folic acid reduced the ac-cumulation of the radioconjugates in tumors and kidneys of mice.The application of excess non-labeled albumin-binding folic acid conjugate (cm13) was, however, much more effective in this regard due to its enhanced blood circulation similar to the folate radioconjugates in question.