Hemophagocytic lymphohistiocytosis caused by multiple infections during primary chemotherapy for pediatric acute lymphoblastic leukemia: a case report

Hemophagocytic lymphohistiocytosis (HLH) is a life-threatening hyperinflammatory disorder that occurs as a consequence of immune dysregulation.HLH can be primary (familial or non-familial) or secondary to infection, autoimmune disease or malignancy.Malignancy-associated HLH is often accompanied by hematologic and lymphoid neoplasms.This report desc

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On a Periodic Solution of the 4-Body Problems

We study the necessary and sufficient conditions on the masses for the periodic solution of planar 4-body problems, where three particles locate Christmas decoration at the vertices of an equilateral triangle and rotate with constant angular velocity about a resting particle.We prove that the above periodic motion is a solution of Newtonian 4-body

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