Histiocytic sarcoma (HS) is a rare malignant tumor that primarily affects the lymph nodes, intestines, skin, and soft tissues. Primary central nervous system histiocytic sarcoma (PCNSHS) is even rarer ...

Langerhans cell histiocytosis (LCH) is a rare hematologic disorder, included in the “L” (Langerhans) group of histiocytosis by the Histiocyte Society (1). LCH cells were initially considered to be ...