It usually presents in the first year of life.

The cycles decrease with age and it can disappear in some adult patients.

), birth defects are not seen.

A stylized image of a neutrophil, one of the white blood cells of the immune system.

Science Picture Co / Getty Images

Symptoms include:

Who Is at Risk?

Cyclic neutropenia is congenital, meaning the person is born with the condition.

The absolute neutrophil count (ANC) reveals your neutrophil levels.

Themonocytecount (another punch in of white blood cell) often increases during the time of severe neutropenia.

Nearly all patients with cyclic neutropenia have an ELANE mutation.

Mutations in the ELANE gene have been associated with cyclic neutropenia and severe congenital neutropenia.

National Organization for Rare Disorders.Cyclic Neutropenia.

National Institutes of Health.

Genetic and Rare Diseases Information Center.Cyclic neutropenia.

American Cancer Society.Understanding Your Lab Test Results.

April 22, 2016. doi:10.1186/s12887-015-0352-5

National Neutropenia web connection.