Neutrophils are a type of white blood cells involved in immune system defense. When the blood test is high, it implies stimulation, usually with infection. Low neutrophils implies immune system supression, often from chemotherapy, but from other causes such as bone marrow dysfunction, toxicities, and other unknown causes.

An update on the diagnosis and treatment of chronic idiopathic neutropenia.2017

Evaluation and Management of Patients with Isolated Neutropenia.2013

Iron Deficiency Anemia-Induced Neutropenia in Adult Female.2020

High Frequency of Thyroid Disorders in Patients Presenting With Neutropenia to an Outpatient Hematology Clinic.2016

ELANE Mutations in Cyclic and Severe Congenital Neutropenia—Genetics and Pathophysiology.2012

Cyclic Neutropenia – StatPearls – NCBI Bookshelf.2020