Infectious agents are implicated in the acute form of<unk> . Viral agents include measles, mumps, Epstein-Barr virus, cytomegalovirus, varicella-zoster virus, influenza virus, and adenovirus. Non-viral agents include Mycoplasma pneumoniae and Haemophilus influenzae. Chronic relapsing<unk>  is classically associated with syphilis, as well as hematological malignancies including non-Hodgkin lymphoma and myeloproliferative neoplasms.
Paroxysmal cold hemoglobinuria
Paroxysmal nocturnal hemoglobinuria
Hereditary spherocytosis
Mixed autoimmune hemolytic anemia
Congenital hemolytic anemia
Trimethylaminuria
Hemoglobin Lepore syndrome
Hereditary persistence of fetal hemoglobin