Overview
Adult chronic idiopathic neutropenia is a condition characterized by persistently low neutrophil counts of unknown cause in adults. This can increase the risk of infection.Diagnosis
Diagnosis is based on a persistently low absolute neutrophil count (ANC) < 1500 cells/µL on at least three occasions over at least three months, with exclusion of other identifiable causes of neutropenia 1.
Evaluation should include a thorough history, physical examination, and laboratory tests to rule out secondary causes such as infections, autoimmune disorders, nutritional deficiencies, and medications 1.
Bone marrow examination may be considered to assess for dysplasia or other abnormalities 1.Management
Management is guided by the severity of neutropenia and the presence of recurrent infections 1.
For asymptomatic patients with mild to moderate neutropenia (ANC > 500 cells/µL), observation and avoidance of infection are often sufficient 1.
For patients with recurrent infections or severe neutropenia (ANC < 500 cells/µL), treatment options may include granulocyte colony-stimulating factor (G-CSF) to increase neutrophil counts 1.
Prophylactic antibiotics are generally not recommended for chronic neutropenia unless the ANC is persistently very low (< 500 cells/µL) or in specific high-risk situations 1.Key Recommendations
Management decisions should be individualized based on the severity of neutropenia and the occurrence of infections 1. (Evidence: Expert opinion)
For patients with recurrent infections or severe neutropenia, granulocyte colony-stimulating factor (G-CSF) may be considered to increase neutrophil counts 1. (Evidence: Expert opinion)
Prophylactic antibiotics are typically reserved for patients with persistently very low neutrophil counts or in specific high-risk scenarios 1. (Evidence: Expert opinion)References
1 Mei-Dan E, Jain V, Melamed N, Lim KI, Aviram A, Ryan G et al.. Directive clinique n. Journal of obstetrics and gynaecology Canada : JOGC = Journal d'obstetrique et gynecologie du Canada : JOGC 2022. link
2 Taplitz RA, Kennedy EB, Bow EJ, Crews J, Gleason C, Hawley DK et al.. Outpatient Management of Fever and Neutropenia in Adults Treated for Malignancy: American Society of Clinical Oncology and Infectious Diseases Society of America Clinical Practice Guideline Update. Journal of clinical oncology : official journal of the American Society of Clinical Oncology 2018. link