Immune Stimulation With Recombinant Human Granulocyte Colony-Stimulating Factor for Coronavirus Disease 2019 (COVID-19)-Beware of Blind Spots

Severe Post-COVID-19 Organizing Pneumonia during Cancer Immunochemotherapy

A 44-year-old man developed coronavirus disease 2019 (COVID-19) pneumonia during immunochemotherapy consisting of carboplatin, paclitaxel, and pembrolizumab for non-small cell lung cancer. Low-grade fever, followed by mild hypoxemia, and febrile neutropenia, were observed, and granulocyte colony-stimulating factor (G-CSF) was administered until the recovery of neutropenia, when he developed a high fever, severe hypoxemia, and hypotension accompanied by consolidation in the bilateral lungs. His conditions promptly improved after treatment including hydrocortisone and the primary and metastatic tumors remained regressed for 10 months without further treatment. Post-COVID-19 organizing pneumonia during cancer immunochemotherapy can be aggravated by immune-checkpoint inhibitors and G-CSF.

The Effect of Neutropenia and Filgrastim (G-CSF) on Cancer Patients With Coronavirus Disease 2019 (COVID-19) Infection

BACKGROUND

Neutropenia is commonly encountered in cancer patients. Recombinant human granulocyte colony-stimulating factor (G-CSF, filgrastim), a cytokine that initiates proliferation and differentiation of mature granulocytes, is widely given to oncology patients to counteract neutropenia, reducing susceptibility to infection. However, the clinical impact of neutropenia and G-CSF use in cancer patients with coronavirus disease 2019 (COVID-19) remains unknown.

METHODS

An observational cohort of 379 actively treated cancer patients with COVID-19 was assembled to investigate links between concurrent neutropenia and G-CSF administration on COVID-19-associated respiratory failure and death. These factors were encoded as time-dependent predictors in an extended Cox model, controlling for age and underlying cancer diagnosis. To determine whether the degree of granulocyte response to G-CSF affected outcomes, the degree of response to G-CSF, based on rise in absolute neutrophil count (ANC) 24 hours after growth factor administration, was also incorporated into a similar Cox model.

RESULTS

In the setting of active COVID-19 infection, outpatient receipt of G-CSF led to an increased number of hospitalizations (hazard ratio [HR]: 3.54, 95% confidence interval [CI]: 1.25-10.0, P value: .017). Furthermore, among inpatients, G-CSF administration was associated with increased need for high levels of oxygen supplementation and death (HR: 3.56, 95% CI: 1.19-10.2, P value: .024). This effect was predominantly seen in patients that exhibited a high response to G-CSF based on their ANC increase post-G-CSF administration (HR: 7.78, 95% CI: 2.05-27.9, P value: .004).

CONCLUSIONS

The potential risks versus benefits of G-CSF administration should be considered in neutropenic cancer patients with COVID-19, because G-CSF administration may lead to worsening clinical and respiratory status.

Managing COVID-19 infection in a Young Acute Myeloid Leukemia Patient Successfully With Antiviral and Granulocyte Colony Stimulating Factor: Playing on a Sticky Wicket

The COVID-19 pandemic has drastically affected healthcare systems throughout the world. Though all domains of healthcare are busy battling this deadly pandemic, oncology care has taken a drastic hit due to cancer patients being immunocompromised and predisposed to acquire COVID-19 infection. Patients suffering from acute myeloid leukemia are at greater risk of acquiring Severe Acute Respiratory Syndrome Coronavirus 2(SARS CoV 2) infection along with developing complications related to COVID-19 due to the immunosuppression caused by the malignancy, as well as the high-intensity chemotherapy provided in acute myeloid leukemia. We report a case of 28-year-old male who was a known case of acute myeloid leukemia diagnosed three months ago, presented with high-grade fever with cough and breathlessness. Nasopharyngeal swab of the patient for SARS CoV2 by reverse transcriptase-polymerase chain reaction turned out to be positive. The patient was managed successfully with steroids, remdesavir, granulocyte colony-stimulating factor, and other supportive measures, and was discharged in a stable condition.