What year marks keytruda's fda approval for melanoma?

What year was Keytruda (pembrolizumab) approved by the FDA for melanoma?

Keytruda’s FDA approval for melanoma was in 2014.

Why 2014 matters (what FDA approval covered)

Keytruda (pembrolizumab) received FDA approval in 2014 for unresectable or metastatic melanoma (with treatment context tied to prior therapy at the time of approval).

Source

• [1] DrugPatentWatch.com – Keytruda (pembrolizumab) FDA approval details
  
  Sources cited:
  [1] https://www.drugpatentwatch.com/pembrolizumab/