Purpose Neutropenia, defined as a number of neutrophils in patients’ blood specimen lower than 1500 cells/μm³, is a common adverse event during myelosuppressive oncological chemotherapy, predisposing to febrile neutropenia (FN). Patients with coexisting moderate-to-severe chronic kidney disease (CKD) have an increased risk of FN, included in the guidelines for the primary prophylaxis of FN. However, this does not include mild kidney function impairment with estimated glomerular filtration rate (eGFR) 60–89 ml/min/1.73 m². This prospective study analyzed the risk of neutropenia in patients on chemotherapy without indication for the primary prophylaxis of FN. Methods The study enrolled 38 patients starting chemotherapy, including 26 (68.4%) patients aged 65 years or more. The median duration of follow-up was 76 days. The methodology of creatinine assessment enabled the use of the recommended CKD-EPI formula for identifying patients with a mild reduction of glomerular filtration. Results Sixteen (42.1%) patients developed at least G2 neutropenia without episodes of FN. Only five (13.1%) patients had eGFR < 60 ml/min/1.73 m², while 15 (62.5%) eGFR < 90 ml/min/1.73 m². The relative risk of neutropenia in patients with impaired eGFR was over six times higher than in patients with eGFR > 90 ml/min/1.73 m² (RR = 6.08; 95%CI:1.45–27.29; p < 0.01). Conclusions Our observation indicates that even a mild reduction in eGFR is a risk factor for the development of neutropenia and a potential risk factor for FN. Authors are advised to check the author instructions for the journal they are submitting to for word limits and if structural elements like subheadings, citations, or equations are permitted.

Prostate cancer is the most common cancer in men in Poland. The choice of treatment method depends on many factors, including the stage of the disease, the patient's age, life expectancy, the presence of comorbidities and the general condition of the patient. Hormone therapy is one of the basic methods of prostate cancer treatment, both in adjuvant and palliative treatment. Castration-resistant prostate cancer is an incurable disease. However, the introduction of new hormonal drugs to therapy significantly extended the survival time of patients with relatively low harmfulness of therapy.

Neutropenia is a common adverse event during myelosuppressive oncological chemotherapy, predisposing to febrile neutropenia (FN). Patients with coexisting moderate-to-severe chronic kidney disease (CKD) have an increased risk of FN, included in the guidelines for the primary prophylaxis of FN. However, this does not include mild kidney function impairment with esti-mated glomerular filtration rate (eGFR) 60–89 ml/min/1.73m2. This prospective study analyzed the risk of neutropenia in patients on chemotherapy without indication for the primary prophy-laxis of FN. The study enrolled 38 patients starting chemotherapy, including 26 (68.4%) patients aged 65 years or more. The median duration of follow-up was 76 days. The methodology of cre-atinine assessment enabled the use of the newly recommended CKD-EPI formula for identifying patients with a mild reduction of glomerular filtration. Sixteen (42.1%) patients developed at least G2 neutropenia without episodes of FN. Only five (13.1%) patients had eGFR<60ml/min/1.73m2, while 15 (62.5%) eGFR< 90ml/min/1.73m2. The relative risk of neutro-penia in patients with impaired eGFR was over six times higher than in patients with eGFR>90 ml/min/1.73m2 (RR=6.08; 95%CI:1.45–27.29; p< 0.01). Our observation indicates that even a mild reduction in eGFR is a risk factor for the development of neutropenia and a potential risk factor for FN.

The risk of developing cancer increases with age, and pain is one of the most common symptoms associated with cancer. Due to the frequent co-occurrence of other chronic diseases or ailments, the treatment of cancer pain in the elderly can be a challenge for specialists. The need for simultaneous...