This review discusses recent advances in in vivo diagnostics and therapeutic immunotargeting of necrotic lesions.The general principles of delivery of various effector mols. to tissues and organs using monoclonal antibodies are described.After reviewing antibody biodistribution and pharmacodynamics in human patients, the authors proceed to analyze these principles in specific exptl. models.The results of animal and clin. use of monoclonal antibodies against chromatin (histones and DNA) for in vivo detection of tumor necrotic zones are evaluated.In addition, the results of Phase I and II clin. trials based on the use of anti-chromatin monoclonal antibodies conjugated with radioactive isotopes to treat solid tumors (brain, colorectal, and other types of cancer) are described.Future directions for in vivo immunotargeting of solid tumors with necrotic components are discussed.