Systemic Immunoglobulin Light Chain Amyloidosis Involving the Large Intestine

ACG Case Rep J. 2021 May 14;8(5):e00578. doi: 10.14309/crj.0000000000000578. eCollection 2021 May.


Amyloidosis is characterized by extracellular tissue deposition of fibrils resulting in disruption of tissue structure and function. Gastrointestinal amyloidosis commonly results from chronic inflammatory disorders (amyloid A amyloidosis) and is less commonly seen in immunoglobulin light chain amyloidosis. We present a rare case of a 50-year-old man with a history of immunoglobulin light chain amyloidosis who presented with abdominal pain, blood in stool, diarrhea, and weight loss. Colonoscopy and biopsies revealed amyloid deposits in the colon. The patient subsequently was referred to colorectal surgery for evaluation of total colectomy with further plans for chemotherapy and subsequent hematopoietic cell transplantation.

PMID:34007856 | PMC:PMC8126548 | DOI:10.14309/crj.0000000000000578