CD274 and non-small cell lung carcinoma: A 54‐year‐old male with unresectable Stage 3 non‐small cell lung cancer (NSCLC) adenocarcinoma (T3N3) of the right upper lobe of the lung (PD‐L1 30% positive), diagnosed 3 months prior, started on carboplatin, pemetrexed, and pembrolizumab therapy with the third cycle completed 17 days prior to admission, presented to the emergency department (ED).