Hemangiopericytoma is a rare neoplasm, accounting for 1% of all orbital tumors (1). Patients typically present in the 5th decade of life (mean age, 41 years), and the tumor has no gender predilection (8,9). Proptosis and palpable mass are common clinical manifestations.
A band cell (also called band neutrophil or stab cell) is a cell undergoing granulopoiesis, derived from a metamyelocyte, and leading to a mature granulocyte. It is characterized by having a nucleus which is curved, but not lobar.The term band cell implies a granulocytic lineage (e.g. neutrophils).n increase in band neutrophils typically means that the bone marrow has been signaled to release more WBCs and increase production of WBCs, also known as a left shift . Most often this is due to infection or inflammation in the body.
The blood has several types of white blood cells including neutrophils, bands, eosinophils, basophils, monocytes and lymphocytes. Each fights infection in a different way. Neutrophils, for example, are one of the body's main defenses against bacteria.Neutrophils kill bacteria by ingesting them.Neutrophils can ingest five to 20 bacteria in their lifetime. Another type of white blood cell is called bands.Bands are immature neutrophils. When a bacterial infection is present, an increase of both neutrophils and bands are seen. The eosinophil type of white blood cell kills parasites and has a role in allergic reactions.asophils release histamine (which makes blood vessels leak and attracts white blood cells) and heparin (which prevents clotting in an infected area so that the white blood cells can reach the bacteria). Monocytes enter the tissue itself, where they become larger. There they can ingest bacteria throughout the body.