Fig. 1

Pathology and Radiology findings or patient with low CD-4+ T-cell count (40 cells/ul). a. core biopsy of mediastinal mass suggestive of invasive squamous cell carcinoma. b. PD-L1 by IHC - 100% +. c. Pre-treatment CT chest suggestive of 5.5 × 2. 9 cm mediastinal mass. d. CT chest suggestive of CR with ICI therapy