“…Generally, PG mainly affects adults who are between 25 and 54 years old, and is frequently associated with a systemic inflammatory disease (e.g., inflammatory bowel disease, rheumatoid arthritis, chronic active hepatitis) or immunodeficiency (leukemia, infection with the human immunodeficiency virus, monoclonal gammopathy of the IgA type); it also may occur in healthy people and can develop following trauma or an operative procedure 9‐14 . In particular, PG after cardiac operation have been rarely reported so far 1‐3,5,15,16 . Reviewing the available published data, less than 10 cases have been specifically reported, and similar to previous data our cardiac‐operated patient was found to have a systemic immune disease consisting of a monoclonal gammopathy with IgG/k chains (Table 1).…”