S1830 Microscopic Colitis as an Unusual Gastrointestinal Complication of Pembrolizumab Therapy: An Important Clinical Update. (October 2021) - Akhtar, Zahra; Kashif Saleem, Hafiz M.; Ali, Hassam; Inayat, Faisal; Awan, Junaid Rasul; Tarar, Zahid I.; Naeem Goraya, Muhammad Hassan; Zafar, Muhammad Usman; Zaman, Muhammad Adnan; Afzal, Arslan; Hussain, Nadeem