“In the United States, AL amyloidosis is the most common type, with approximately 4,500 new cases diagnosed every year. It usually affects people from ages 50-80, although there are a few cases of people being diagnosed as early as their late 20s. About two-thirds of the patients are male.  AL amyloidosis is caused by a bone marrow disorder.  The bone marrow in the center of bones produces cells in the blood system, including “plasma cells.”  These plasma cells are the part of the immune system that makes antibodies for fighting infections.”

Amyloidosis Foundation (http://amyloidosis.org/facts/al/)