| Autor: |
BARBARO, BRUNELLA, LECCISOTTI, LUCIA, VECCHIO, FABIO M., DI MATTEO, MARIALUISA, SERRA, TERESA, SALSANO, MARCO, POSCIA, ANDREA, COCO, CLAUDIO, PERSIANI, ROBERTO, ALFIERI, SERGIO, GAMBACORTA, MARIA ANTONIETTA, VALENTINI, VINCENZO, GIORDANO, ALESSANDRO, BONOMO, LORENZO |
| Zdroj: |
British Journal of Radiology; Jan2017, Vol. 90 Issue 1069, p1-13, 13p, 2 Black and White Photographs, 1 Diagram, 11 Charts, 2 Graphs |
| Abstrakt: |
Objective: To correlate imaging parameters from baseline MRI diffusion-weighted imaging (DWI) and fludeoxyglucose (FDG) positron emission tomography (PET)-CT with synchronous and metachronous metastases in mucinous carcinoma (MC) and non-mucinous carcinoma (NMC) rectal cancer. Methods: 111 patients with extraperitoneal locally advanced rectal cancer, who underwent pelvic MRI, DWI and FDG PET-CT, were stratified into MC (n = 23) and NMC (n = 88). We correlated adverse morphologic features on MRI [mT4, mesorectal fascia involvement, extramural venous invasion (mEMVI), mN2] and quantitative imaging parameters [minimum apparent diffusion coefficient (ADCmin), maximum standardized uptake value, total lesion glycolysis, metabolic tumour volume, T2 weighted and DWI tumour volumes] with the presence of metastatic disease. All patients underwent pre-operative chemoradiation therapy (CRT); 100/111 patients underwent surgery after CRT and were classified as pathological complete response (PCR) and no PCR [tumour regression grade (TRG)1 vs TRG2–5] and as ypN0 and ypN1–2. Median follow-up time was 48 months. Metastases were confirmed on FDG PET-CT and contrast-enhanced multidetector CT. Results: The percentage of mucin measured by MRI correlates with that quantified by histology. On multivariate analysis, the synchronous metastases were correlated with mEMVI [odds ratio (OR) = 21.48, p < 0.01] and low ADCmin (OR = 0.04, p = 0.038) in NMC. The difference of metachronous recurrence between the MC group (10–90% mucin) and NMC group was significant (p < 0.01) (OR = 21.67, 95% confidence interval 3.8–120.5). Metachronous metastases were correlated with ypN2 (OR = 8.24, p = 0.01) in MC and in NMC. In NMC, mEMVI correlated with no PCR (p = 0.018) and ypN2 (p < 0.01). Conclusion: mEMVI could identify patients with NMC, who are at high risk of synchronous metastases. The MC group is at a high risk of developing metachronous metastases. Advances in knowledge: Patients at high risk of metastases are more likely to benefit from more aggressive neoadjuvant therapy. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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