Abstract
Objectives
We investigated the correlation between the apparent diffusion coefficient (ADC) and Ki-67 index using diffusion-weighted whole-body imaging with background body signal suppression (DWIBS), and their utility in evaluating malignant lymphoma cell proliferation.
Materials and Methods
Seventy-four patients with malignant lymphoma underwent DWIBS within 1 week before pathological confirmation. The ADC value was measured at the site of the pathological examination, and specimens were also stained with Ki-67. The ADC values and Ki-67 indices in aggressive non-Hodgkin's lymphoma (NHL), indolent NHL, and Hodgkin's lymphoma (HL) were compared using Spearman's rank correlation coefficient and the Kruskal-Wallis test.
Results
The Ki-67 indices and ADC values were inversely correlated (r = -0.289, p = 0.0125); the differences in the Ki-67 index between aggressive NHL, indolent NHL, and HL were significant (p < 0.001); this was confirmed by the Nemenyi test except for indolent NHL vs. HL. The ADC values were significantly different between the types of lymphoma (p = 0.013); the Nemenyi test showed a significant difference only between aggressive NHL and HL.
Conclusions
The Ki-67 indices and ADC values are inversely correlated in patients with lymphoma, combining DWIBS and ADC values can evaluate the proliferation level of malignant lymphoma cells noninvasively.
Key points
• By using DWIBS, malignant lymphoma cell proliferation can be assessed noninvasively.
• The ADC value and Ki-67 index are significantly and inversely correlated.
• The ADC values were lower in aggressive NHL than in HL.
• The ADC values of aggressive and indolent NHL were not significantly different.
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Abbreviations
- ADC:
-
Apparent diffusion coefficient
- DWIBS:
-
Diffusion-weighted whole-body imaging with background body signal suppression
- NHL:
-
Non-Hodgkin's lymphoma
- HL:
-
Hodgkin's lymphoma
- MRI:
-
Magnetic resonance imaging
- TI:
-
Inversion time
- DWI:
-
Diffusion-weighted imaging
- TR:
-
Repetition time
- TE:
-
Echo time
- FOV:
-
Field of view
- ROI:
-
Region of interest
- NK:
-
Natural killer
- MCL:
-
Mantle cell lymphoma
- IPI:
-
International Prognostic Index
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The scientific guarantor of this publication is Jingliang Cheng.
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The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
Funding
This study has received funding by a key project grant from the Technology Department of Henan Province, China. No.112102310703
Statistics and biometry
No complex statistical methods were necessary for this paper.
Informed consent
Written informed consent was obtained from all subjects (patients) in this study.
Ethical approval
Institutional Review Board approval was obtained.
Methodology
• retrospective
• diagnostic study
• performed at one institution
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Sun, M., Cheng, J., Zhang, Y. et al. Application of DWIBS in malignant lymphoma: correlation between ADC values and Ki-67 index. Eur Radiol 28, 1701–1708 (2018). https://doi.org/10.1007/s00330-017-5135-y
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DOI: https://doi.org/10.1007/s00330-017-5135-y