Management of Metastatic Pulmonary Spindle Cell Carcinoma With Upfront Pembrolizumab‐Chemotherapy and Subsequent Ipilimumab–Nivolumab Salvage Therapy: A Case Report. - Siddiqui, Raheel; Chattha, Suneeba; Daboul, Nour; Mayordomo, Jose I. (Case Reports in Oncological Medicine, 2026)