Репозиторий Университета

© 2019, The Author(s). Purpose: To assess the accuracy of [68Ga]-PSMA-11 PET/CT or [68Ga]-PSMA-11 PET/MRI (PSMA-11 PET/CT(MRI)) for lymph node (LN) staging using salvage LN dissection (SLND) in patients with biochemical recurrence (BCR) after radical prostatectomy (RP). Patients and methods: In a prospective study, 65 consecutive patients who developed BCR after RP underwent SLND after PSMA-11 PET/CT(MRI) between 2014 and 2018. Extended SLND up to the inferior mesenteric artery was performed in all patients. Regional and template-based correlations between the presence of LN metastases on histopathology and whole-body PSMA-11 PET/CT(MRI) results were evaluated. The diagnostic accuracy of PSMA-11 PET/CT(MRI) was also evaluated in relation to PSA level at the time of SLND. Results: The median age of the patients at the time of SLND was 65 years (IQR 63–69 years) and the median PSA level was 1.4 ng/ml (IQR 0.8–2.9 ng/ml). Before SLND, 50 patients (77%) had additional therapy after RP (26.2% androgen-deprivation therapy and 50.8% radiotherapy). The median number of LNs removed on SLND was 40 (IQR 33–48) and the median number of positive nodes was 4 (IQR 2–6). LN metastases were seen in 13.8% of resected LNs (317 of 2,292). LNs positive on PSMA-11 PET/CT(MRI) had a median diameter of 7.2 mm (IQR 5.3–9 mm). Metastatic LNs in regions negative on PSMA-11 PET had a median diameter of 3.4 mm (IQR 2.1–5.4 mm). In a regional analysis, the sensitivity of PSMA-11 PET/CT(MRI) ranged from 72% to 100%, and the specificity from 96% to 100%. Region-specific positive and negative predictive values ranged from 95% to 100% and 93% to 100%, respectively. Conclusion: PSMA-11 PET/CT(MRI) has a very good performance for the identification of LN metastases in patients with BCR after RP. The high diagnostic accuracy in the regional and subregional analyses demonstrates the potential of this approach to enable a region-directed instead of a complete bilateral therapeutic intervention. The performance of PSMA-11 PET/CT(MRI) is dependent on the PSA level and the size of the metastatic deposit.

AIM: To evaluate the results of selective approach for splenic flexure mobilization (SFM) after total mesorectal excision with low colorectal anastomoses. MATERIAL AND METHODS: Clinical data were obtained from the multicenter RCT database comparing ileostomy and colostomy in patients with rectal cancer who underwent total mesorectal excision from 2012 to 2017. Our clinic policy is performing paraaortic lymph node dissection with 'low' inferior mesenteric artery ligation, left colic artery preservation and use of sigmoid colon for colorectal anastomosis. SFM was used only in cases of inability to apply above-mentioned procedure (selective approach for SFM). RESULTS: SFM was performed in 15 (13%) out of 115 patients. The most frequent reasons for SFM were sigmoid colon diverticulosis, impaired blood supply or inadequate length of sigmoid colon. There were no differences in intraoperative and postoperative complications between TME without SFM and TME with SFM. CONCLUSION: Selective SFM in TME followed by advanced paraaortic lymph node dissection and left colic artery preservation is safe and may be considered as a viable option to routine SFM in rectal cancer surgery.

© 2018 ABC-press Publishing House. All rights reserved. The objective is to perform comparative analysis of intra- and postoperative complications of retroperitoneoscopic radical nephrectomy (RRN) and laparoscopic radical nephrectomy (LRN) for large tumors. Materials and methods. The study includes examination and treatment data for 108 patients with stage T1–3a renal cell carcinoma. Results and conclusion. A number of advantages of RRN compared to LRN were demonstrated associated with shorter surgery duration with fast processing of the renal pedicle, lower blood loss, lower use of analgesics in the postoperative period, shorter duration of hospitalization, and quick recovery after the surgery. The rate of intra- and postoperative complications for RRN was 19.2 and 17.3 %, for LRN – 33.9 and 37.5 %, respectively. Complications associated with abdominal organs were absent for RRN. After LRN, the rate of serious complications was significantly higher than after RRN.