Histiocytosis is a general name for a group of syndromes that involve an abnormal increase in the number of immune cells called histiocytes. There are three major classes of histiocytosis:<unk> , which is also called histiocytosis X, malignant histiocytosis syndrome (now known as T-cell lymphoma), non-Langerhans cell histiocytosis (also known as hemophagocytic syndrome).
Langerhans cell histiocytosis
Faisalabad histiocytosis
Malignant histiocytosis
Malignant fibrous histiocytoma
Granulocytic sarcoma
B-cell lymphoma
T-cell lymphoma
Mast cell tumor