The story on HLH

HLH can be inherited or acquired. When it occurs in children, it is usually because both parents are genetic carriers.

In adults, it can be caused by conditions such as infections and cancer.

It causes certain white blood cells – histiocytes and lymphocytes – to attack other blood cells. The abnormal blood cells also collect in

the spleen and liver and cause the organs to enlarge. Symptoms can include persistent fever, rash, enlarged lymph nodes, anemia, jaundice, respiratory issues, seizures, and low white blood cells.