Would you consider upfront immunotherapy in a patient with MSI strongly positive locally advanced adenocarcinoma of the anus versus standard of care?

Great question. For anal and rectal cancers, histology generally supersedes location in determining treatment paradigm, so an anal adenocarcinoma would be treated like a rectal adenocarcinoma (you might consider anal canal involvement T4 staging).

Standards of care for MSI-H locally advanced rectal a...