S1622 Acute Acalculous Cholecystitis: An Unusual First Manifestation of COVID-19. (October 2021) - Pamarthy, Rahul; Inayat, Faisal; Hussain, Nadeem; Naeem Goraya, Muhammad Hassan; Tarar, Zahid I.; Riaz, Iqra; Awan, Junaid Rasul; Akhtar, Zahra; Zaman, Muhammad Adnan; Zafar, Muhammad Usman; Hurairah, Abu