151. The role of apparent diffusion coefficient (ADC) in the evaluation of lymph node status in patients with locally advanced cervical cancer: our experience and a review.
- Author
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Gui B, Russo L, Minordi L, Miccò M, Persiani S, Avesani G, Rufini V, Fuoco V, Autorino R, Ferrandina G, Scambia G, and Manfredi R
- Abstract
Purpose: To evaluate the role of apparent diffusion coefficient (ADC) value measurement in the diagnosis of meta-static lymph nodes (LNs) in patients with locally advanced cervical cancer (LACC) and to present a systematic review of the literature., Material and Methods: Magnetic resonance imaging (MRI) exams of patients with LACC were retrospectively eva-luated. Mean ADC, relative ADC (rADC), and correct ADC (cADC) values of enlarged LNs were measured and compared between positron emission tomography (PET)-positive and PET-negative LNs. Comparisons were made using the Mann-Whitney U -test and Student's t -test. ROC curves were generated for each parameter to identify the optimal cut-off value for differentiation of the LNs. A systematic search in the literature was performed, exploring several databases, including PubMed, Scopus, the Cochrane library, and Embase., Results: A total of 105 LNs in 34 patients were analysed. The median ADC value of PET-positive LNs (0.907 × 10
-3 mm2 /s [0.780-1.080]) was lower than that in PET-negative LNs (1.275 × 10-3 mm2 /s [1.063-1.525]) ( p < 0.05). rADC and cADC values were lower in PET-positive LNs (rADC: 0.120 × 10-3 mm2 /s [-0.060-0.270]; cADC: 1.130 [0.980-1.420]) than in PET-negative LNs (rADC: 0.435 × 10-3 mm2 /s [0.225-0.673]; cADC: 1.615 [1.210-1.993]) LNs ( p < 0.05). ADC showed the highest area under the curve (AUC 0.808)., Conclusions: Mean ADC, rADC, and cADC were significantly lower in the PET-positive group than in the PET-negative group. The ADC cut-off value of 1.149 × 10-3 mm2 /s showed the highest sensitivity. These results confirm the usefulness of ADC in differentiating metastatic from non-metastatic LNs in LACC., Competing Interests: The authors report no conflict of interest., (© Pol J Radiol 2022.)- Published
- 2022
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