In an apparent breakthrough for the treatment of rectal cancer, a drug trial in the USA resulted in every patient having their cancer successfully go into remission.
The drug, dostarlimab (sold under brand name Jemperli) is an immunotherapy drug for treatment of endometrial cancer, but this was the first clinical investigation to see if it was also effective against rectal cancer tumors.

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 any cancer drug intervention.
SOURCE: http://www.sciencealert.com