Can you name the specific cancer type keytruda was approved for in its initial fda approval?

What cancer was Keytruda first FDA-approved for?

Keytruda (pembrolizumab) received its initial U.S. FDA approval for unresectable or metastatic melanoma that is progressing after treatment with ipilimumab (Yervoy) and, if BRAF V600 mutation-positive, a BRAF inhibitor.[1]

Where that first approval sits in Keytruda’s broader FDA history

That first approval was the start of Keytruda’s expansion into additional cancers and settings (later indications added through subsequent FDA approvals). But the original, first-label cancer type was melanoma.[1]

Sources:
[1] https://www.drugs.com/history/pembrolizumab.html