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. 2019 Jul 8:11:6285-6297.
doi: 10.2147/CMAR.S195989. eCollection 2019.

Correlation between pelvic bone marrow radiation dose and acute hematological toxicity in cervical cancer patients treated with concurrent chemoradiation

T Kumar  1   2   3 , A Schernberg  1   2 , F Busato  1   2 , M Laurans  1   2 , I Fumagalli  1   2 , I Dumas  1   2 , E Deutsch  1   2 , C Haie-Meder  1   2 , C Chargari  1   2   4   5
Affiliations

Correlation between pelvic bone marrow radiation dose and acute hematological toxicity in cervical cancer patients treated with concurrent chemoradiation

T Kumar et al. Cancer Manag Res. .

Abstract

Purpose: To evaluate the association between pelvic bone marrow (BM) dose volume parameters and probability of acute hematological toxicity (HT), a cohort of cervical cancer patients receiving definitive chemoradiation (CRT) was assessed.

Materials and methods: Medical records of patients treated by CRT (45 Gy in 25 fractions, without dose constraints applied to the BM) were reviewed. Baseline and weekly hematological parameters were collected. BM was retrospectively delineated and divided into sub-sites: iliac crests, lower pelvis, lumbosacral region. BM volumes (V) receiving 5, 10, 20, 30, 40 Gy (V5, V10, V20, V30, V40, respectively) and mean dose (Dm) were calculated. Logistic regression was used to analyze associations between HT and dose-volume histograms parameters.

Results: 114 patients were included. 75.4% were treated with 3D radiation therapy and 24.6% were receiving intensity modulated radiation therapy (IMRT). Neither age, chemotherapy regimen (cisplatin vs carboplatin), number of chemotherapy cycles, performance status, body mass index, or para-aortic irradiation were associated with HT. In univariate analysis, more frequent grade 3+ leukopenia was found in the IMRT group (odds ratio [OR]: 3.5; 95% CI, 1.4-9.1; p=0.007). In multivariate analysis, grade 4 HT was associated with lower pelvis V5>95% (OR 4.1; 95% CI, 1.6-14. p=0.02), lower pelvis V20>45% (OR 3.5; 95% CI, 1.1-13.4; p=0.05), total pelvic bone V20>65%, and iliac crests Dm >31 Gy (OR 4.5; 95% CI, 1.4-14.7; p=0.02).

Conclusion: The following dose constraints could be proposed to decrease acute HT risk: lower pelvis V5<95%, lower pelvis V20≤45%, total pelvic bone V20<65%, and iliac crests Dm <31 Gy.

Keywords: acute hematological toxicity; bone marrow; cervical cancer; dosimetric parameters.

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Conflict of interest statement

E Deutsch report grants, personal fees, and nonfinancial support from Roche, grants from Servier, grants and personal fees from Medimmune, Boerhinger, and Bristol-Myers Squibb, and personal fees from Amgen and Accuray, outside the submitted work, and reports no other conflicts of interest in this work. The other authors report no conflicts of interest in this work.

Figures

Figure 1
Figure 1
(A) Pelvic bone delineation in different sub-sites: iliac crests (green), lumbosacral region (yellow), lower pelvis (blue), and a 3D reconstruction. (B) Inner cavity of the pelvic bone (yellow), which was used as a surrogate for bone marrow and a 3D reconstruction.
See this image and copyright information in PMC

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