The 13-year bleed: Exuberant amyloid angiopathies, angiodysplasias, and acquired coagulopathies of the gut.

Amyloidosis is a disorder characterized by extracellular deposits of proteins that are prone to aggregate and form insoluble fibrils. Amyloid deposits limited to a single organ or tissue without the involvement of any other site in the body is uncommon. We report a 75-year-old man with previously treated non-Hodgkin's lymphoma who presented with recurrent gastrointestinal hemorrhage. Histopathology showed amyloid deposition within vascular malformations. His bleeding continued with the cause rooted in the fundamental building blocks-clotting factors. We discuss the interplay of the pathophysiology of lymphoma, amyloidosis, and factor X deficiency in a patient with preexisting angiodysplasias leading to refractory gastrointestinal bleeding. To our knowledge, there are only 3 reported cases of concomitant amyloidosis and angiodysplasia in the colon, and none involving the small bowel.