Neutropenia is a medical condition characterized by a low count of neutrophils, which are a type of white blood cell that is essential to the body's immune system. The condition is often diagnosed by a blood test and can be caused by a variety of factors, including medications, infections, and genetic disorders.

Neutropenia is commonly used in the healthcare industry as a marker of immune function, as neutrophils play a critical role in fighting off infections and diseases. Neutropenia is also used as a diagnostic tool for certain types of cancer, as some cancer treatments can cause a decrease in the number of neutrophils.

Treatment for neutropenia depends on the underlying cause and severity of the condition. In some cases, medication may be prescribed to boost white blood cell counts, while in other cases, supportive care may be necessary to prevent infections and other complications.

Overall, neutropenia is an important medical condition that is widely used in the healthcare industry to assess immune function and diagnose various diseases.