The displayed fluorescent image of different frozen sections (Figure 6B) also demonstrated distinct enhancement of red fluorescence in tumor tissues of mice treated with ADR-loaded liposomes compared with that treated with free ADR, and the administration of PC-ADR-Fab can induce more retention of ADR in tumor tissues than the administration of PC-ADR-BSA for the active targeting of Fab fragments. The gene discussed is FANCB; the disease is neoplasm.