“…PCH has historically been associated with syphilis infection. In children, it usually occurs in boys under five years old and has recently been reported in AIHA following viral or bacterial infections, including measles, mumps, varicella, cytomegalovirus, Epstein Barr virus, influenza virus, parvovirus B19, coxsackievirus, and adenovirus, which are transient and do not recur (5). PCH is rare in adults but can be caused by malignant diseases, such as non-Hodgkin lymphoma or chronic lymphocytic leukemia (6,7).…”