title: Practical considerations in the exploitation of passive tumor targeting.
abstract: Specific targeting of radioisotopes or toxic drugs to tumors for cancer detection and treatment is an enticing but elusive goal. It has proved difficult to achieve adequate concentration ratios between tumor and normal tissues to improve on standard diagnostic and therapeutic methods.
authors.affiliation: Department of Clinical Oncology, Derbyshire Royal Infirmary, Derby, UK.
authors.forename: G D
authors.initials: GD
authors.lastname: Thomas