MDCT and MRI of the ampulla of Vater. Part II: non-epithelial neoplasms, benign ampullary disorders, and pitfalls.
Alessandrino F, Souza D, Ivanovic AM, Radulovic D, Yee EU, Mortele KJ. MDCT and MRI of the ampulla of Vater. Part II: non-epithelial neoplasms, benign ampullary disorders, and pitfalls. Abdom Imaging. 2015 Oct; 40(8):3292-312.