Chlamydia pneumoniae-related hemophagocytic lymphohistiocytosis in an adult patient with clonal karyotype abnormality.

Hemophagocytic lymphohistiocytosis (HLH) is a rare life-threatening disease characterized by a severe hyperinflammation caused by uncontrolled proliferation of activated lymphocytes and macrophages. Herein, we report a 58-year-old male who had Chlamydia pneumoniae-related pneumonia, followed by aggressive HLH. An abnormal cytogenetic profi le was also detected. To our knowledge, this is the fi rst report of an adult patient with C. pneumoniaassociated HLH.