Radiotherapy with a sharply delimited field, optimistically considered to be equivalent to resecting the irradiated region.

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ra·dio·sur·gery -'sərj-(ə-)rē n, pl -ger·ies
1) surgery by means of a radio knife
ra·dio·sur·gi·cal -'sər-ji-kəl adj

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ra·dio·sur·gery (ra″de-o-surґjər-e) surgery in which tissue destruction is by means of ionizing radiation rather than surgical incision; the radiation may be from an implant or an external source.

Medical dictionary. 2011.

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