Can you recall the specific cancer type for keytruda's first fda approval?

What cancer did Keytruda get FDA approval for first?

Keytruda’s first FDA approval (in 2014) was for melanoma—specifically unresectable or metastatic melanoma. [1]

Why does “first approval” matter (and what it excludes)?

That initial FDA approval was for melanoma and came before later approvals for other tumor types (like lung cancer, bladder cancer, Hodgkin lymphoma, and others). Those are separate indications from the first approval. [1]

Source

1. DrugPatentWatch.com – Keytruda (pembrolizumab)