Nonbacterial thrombotic endocarditis as an initial presentation of advanced cholangiocarcinoma in a young patient: A case report oleh Bandar Al-Ghamdi, Fahmi A Alkaf, Menwar M Al-Anazi, Yahya Al Hebaishi, Normeen A Al Othimeen, Asirvatham Alwin Robert, Osman Ahmed, Abdullah Alkhushail