NEW YORK – In what appears to be a very promising breakthrough for the treatment of rectal cancer, a small drug trial conducted in the US found every patient treated in the experiment had their cancer successfully go into remission.

The medication given, called dostarlimab and sold under the brand name Jemperli, is an immunotherapy drug used in the treatment of endometrial cancer, but this was the first clinical investigation of whether it was also effective against rectal cancer tumors.

The early results reported so far suggest it is surprisingly effective, with the research team saying the successful cancer remission seen in every trial patient may be unprecedented for a cancer drug intervention.

“I believe this is the first time this has happened in the history of cancer,” medical oncologist Luis Diaz Jr. from Memorial Sloan Kettering Cancer Center (MSK), the senior author of a new paper reporting the results, told The New York Times.

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