We report a 35-year-old sportive man who was admitted to the emergency department for worsening of acute spontaneous abdominal pain appearing at rest. He only referred having lifted a tree trunk the day before, but he was used to perform such physical efforts. The clinical course at the emergency department was marked by the development of severe anemia secondary to a progressive splenic hematoma and acute pulmonary distress. The patient benefited from total splenectomy. Laboratory data showed hypogammaglobulinemia, proteinuria and the anatomopathological examinations of both spleen and kidneys were consistent with light chain amyloidosis.