What is "reticulocytosis"

n. (context medicine English) An increase in reticulocytes, commonly seen in anemia.

Reticulocytosis is a condition where there is an increase in reticulocytes, immature red blood cell. It is commonly seen in anemia. They are seen on blood films when the bone marrow is highly active in an attempt to replace red blood cell loss such as in haemolytic anaemia, haemorrhage.