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The present invention concerns compositions comprising a radiotherapeutic agent, or an agent which can be converted to a radiotherapeutic, and a tissue glue. The compositions of the present invention are particularly useful for providing local radiotherapy. The present invention also concerns method

The present invention concerns compositions comprising a radiotherapeutic agent, or an agent which can be converted to a radiotherapeutic, and a tissue glue. The compositions of the present invention are particularly useful for providing local radiotherapy. The present invention also concerns methods of using the compositions of the invention, particularly for radiotherapy.

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1. A composition comprising a tissue glue and, in particulate form, a radiotherapeutic agent or an agent convertible to a radiotherapeutic, wherein said agent mediates localized radiotherapeutic activity when immobilized in the glue.2. The composition according to claim 1, which additionally compris

1. A composition comprising a tissue glue and, in particulate form, a radiotherapeutic agent or an agent convertible to a radiotherapeutic, wherein said agent mediates localized radiotherapeutic activity when immobilized in the glue.2. The composition according to claim 1, which additionally comprises a material that inhibits degradation of the glue.3. The composition according to claim 1, wherein the agent is in the form of a chelate holding a radioactive atom.4. The composition according to claim 1, wherein the agent is a ferrite.5. The composition according to claim 1, which additionally comprises a radiation sensitizer capable of leaching out and augmenting the local radiotherapeutic effect.6. The composition according to claim 1, which additionally comprises a growth factor or other substance that mitigates the anti-wound-healing effect of radiation.7. The composition according to claim 1, wherein the agent comprises a zinc-substituted yttrium ferrite, or a 56Fe-enriched ferrite.8. The composition according to claim 1, wherein the agent comprises 103Pd or 90Y.9. The composition according to claim 1, further comprising an antibody, and wherein the tissue glue is a fibrinogen tissue glue.10. The composition according to claim 9, wherein the particulate radionucide is a β-emitting ferrite.11. The composition according to claim 9, wherein the particulate radionucide is coupled to the antibody.12. The composition according to claim 11, wherein the antibody is a nerve adhesion molecule.13. A composition comprising a tissue glue and, in particulate form, a radiotherapeutic ferrite or a ferrite convertible to a radiotherapeutic, wherein the ferrite mediates localized radiotherapeutic activity when immobilized in the glue.14. The composition according to claim 13, wherein the ferrite is a β-emitting ferrite.15. A composition comprising a tissue glue and, in particulate form, a radiotherapeutic agent or an agent convertible to a radiotherapeutic, wherein the agent comprises a zinc substituted yttrium ferrite or 56Fe-enriched ferrite, wherein said agent mediates localized radiotherapeutic activity when immobilized in the glue.16. A composition comprising a tissue glue and, in particulate form, a radiotherapeutic agent or an agent convertible to a radiotherapeutic, wherein the agent is a ferrite comprising 103Pd or 90Y, and wherein said agent mediates localized radiotherapeutic activity when immobilized in the glue.17. A method for making a radiotherapeutic composition according to claim 9, which comprises:(a) preparing a particulate radionuclide; and (b) mixing the particulate radionucide with the fibrinogen tissue glue and the antibody. 18. A method of using a radiotherapeutic composition according to claim 9, which comprises applying the composition directly to tumor tissue.19. A method of radiation synovectomy which comprises administering an effective amount of a composition of claim 1 to a patient to be treated.20. A method for the radiotherapy of a tumor, which comprises applying to the tumor an effective amount of a composition as defined in claim 1.21. The method of claim 20, wherein the radiotherapy of a tumor comprises brachytherapy.22. A method of radiotherapy in the treatment of arterio-venous malformations in a blood vessel which comprises applying to the blood vessel a composition as defined in claim 1.