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Light chain myeloma presenting as chronic diarrhea

Light chain myeloma represents one-fifth of all cases of myeloma and light chain amyloidosis is associated with 10% of cases of myeloma. Multiple myeloma is a plasma cell disorder with diverse presentations. Here, we present a 72-year-old male with light chain myeloma with colorectal amyloidosis. Chronic diarrhea secondary to isolated colorectal amyloidosis as an initial presentation of multiple myeloma is extremely rare. Early diagnosis is important for timely therapeutic interventions which can improve the treatment outcome in this otherwise uniformly fatal disease.