The Undervalued Acute Leukopenia Induced By Radiotherapy In Cervical Cancer.

Background: Myelosuppression is common and threatening during tumor treatment. However, the effect of radiation on bone marrow activity, especially leukocyte count, has been underestimated in cervical cancer. The aim of this study was to evaluate the severity of radiotherapy- induced acute leukopenia and its relationship with intestinal toxicity.

Methods: The clinical data of 59 patients who underwent conventional radiation alone for cervical cancer were retrospectively analyzed. The patients had normal leukocyte count on admission, and the blood cell count, gross tumor volume (GTV) dose, and intestinal toxicity were evaluated.

Results: During radiotherapy (RT), 47 patients (79.7%) developed into leukopenia, with 38.3% mild and 61.7% moderate. The mean time for leukopenia was 9 days. Compared with leukopenianegative patients, leukopenia-positive ones had lower baseline leukocyte count, while neutrophil/ lymphocyte (NLR) and monocyte/lymphocyte (MLR) showed no significance. Logistic regression analysis indicated that excluding the factors for age, body mass index (BMI), TNM stage, surgery and GTV dose, baseline leukocyte count was an important independent predictor of leukopenia (OR=0.383). During RT, a significant reduction was found in leukocyte, neutrophil and lymphocyte count at week 2 while monocyte count after 2 weeks. Furthermore, NLR and MLR showed a significant and sustained upward trend. About 54.2% of patients had gastrointestinal symptoms. However, no significant relevance was noted between leukocyte count as well as NLR/MLR and intestinal toxicity, indicating leukopenia may not be the main factor causing and aggravating gastrointestinal reaction in cervical cancer.

Conclusion: Our results suggest the underrated high prevalence and severity of leukopenia in cervical cancer patients receiving RT, and those with low baseline leukocyte count are more likely for leukopenia, for whom early prevention of infection may be needed during RT.