Besilesomab is a mouse

Mouse

A mouse is a small mammal belonging to the order of rodents. The best known mouse species is the common house mouse . It is also a popular pet. In some places, certain kinds of field mice are also common. This rodent is eaten by large birds such as hawks and eagles...

 monoclonal antibody labelled with the radioactive isotope technetium-99m

Technetium-99m

Technetium-99m is a metastable nuclear isomer of technetium-99, symbolized as 99mTc. The "m" indicates that this is a metastable nuclear isomer, i.e., that its half-life of 6 hours is considerably longer than most nuclear isomers that undergo gamma decay...

. It is used to detect inflammatory lesions and metastases. It binds to a immunoglobulin, IgG1 isotype

Isotype

Isotype can refer to:* In crystallography, an "isotype" is a synonym for isomorph* In biology, per the International Code of Botanical Nomenclature, the "isotype" is a duplicate of the holotype....

. SCINTIMUN has been used since 1992 mainly in Hungary, Czech Republic, and Switzerland on the basis of local marketing authorizations, and in Germany (on the basis of individual prescription). Between 1992 and 2009, an estimated 90,000 patients has been studied. In 2009, the EMEA

EMEA

EMEA may stand for:* the previous acronym of the European Medicines Agency, an EU regulatory agency for the evaluation of medicinal products* Europe, the Middle East and Africa...

has approved SCINTIMUN for marketing in all European countries.