Background: The novel surgical procedure transanal total mesorectal excision (taTME) has rapidly become an interest of research in order to overcome the shortcomings of laparoscopic surgery in the treatment of middle and low rectal cancer. taTME is a new natural orifice transluminal endoscopic surgery modality combining three rectal surgery techniques. Methods: A retrospective clinical study was conducted in a single centre for a period of 3 years, and herein we report on our first 25 taTME procedures in patients with middle and lower third rectal adenocarcinoma. Results: The main demographics were evaluated. The mean age of patients was 64 ± 12 years. There were predominantly males (72%) and 7 female patients (28%) with an average body mass index of 29 ± 4.8 kg/m². High blood pressure, obesity, chronic heart insufficiency, chronic atrial fibrillation, and diabetes mellitus were commonly diagnosed in all patients. A circumferential resection margin >1 mm was achieved in 16% (n = 4), >2 mm in 40% (n = 10), and >3 mm in 44% (n = 11) of operated patients. The average CRM was 1.8 ± 0.9 cm. In 24% of cases, the distance of a tumour from the mesorectal fascia (MRF) was <1 mm; meanwhile, for 76% of patients, the tumour margin was >1 mm from the MRF. Recovery to flatus was 3 ± 1 days. The average length of hospital stay was 11 ± 3 days. The overall postoperative morbidity was 8%, i.e. one (4%) complication classified as Clavien-Dindo degree I and one (4%) major (IIIb) complication. Subsequently, all patients successfully recovered and were discharged from hospital. During the follow-up period no cancer recurrence was observed. Conclusion: Our results nicely demonstrate that taTME can be safely performed with acceptable perioperative complications in patients with middle or lower third rectal cancer. In addition, the perioperative morbidity is also acceptable. However, taTME remains a technically highly demanding operation but is feasible and safe after the appropriate experience is gained. Nevertheless, larger multi-centre prospective randomised studies are ongoing to confirm the safety and to verify oncological results when compared to laparoscopic rectal surgery.

Purpose: Our aim was to see the possible effect of the first COVID pandemic wave in Lithuania on colorectal cancer (CRC) preventive, diagnostic and treatment procedures.Methods: A retrospective analysis was performed using the database of the National Cancer Institute, Lithuania. We have divided patients into two groups: group 1 – patients treated during the nonpandemic period (2019 January 1 to 2019 July 31) and group 2 – the pandemic period (2020 January 1 to 2020 July 31). We analyzed numbers of screening, therapeutic colonoscopies performed, and treated patients for CRC during two periods.Results: In general, 1318 lower gastrointestinal endoscopic procedures were performed in the first group and 862 procedures in the second group, which was 34.6% less compared to the first group. The first group included 672 (51%) colonoscopies, 172 (13%) day surgeries and 474 (36%) CRC screening programmes. In group 2, 456 (34.6%) less patients underwent CRC diagnostics and treatment: 141 (21%) less colonoscopies, 93 (54%) less day surgeries, 222 (47%) less CRC screening programmes, and 26 (13%) less patients were hospitalized for surgical treatment (196 vs 170).Conclusion: Our study reveals worrying changes in the timely access to diagnostic procedures during the COVID-19 pandemic that possibly provoked rise in cases with the advanced stage CRC. However, despite numerical difference between groups existed, the difference between groups do not reach statistical significant level.

Transanal total mesorectal excision (taTME) is a new natural orifice translumenal endoscopic surgery modality combined of three rectal surgery techniques. Detailed analysis of the taTME is the object of this article. We submit the report of three taTME procedures for histologically confirmed rectal adenocarcinoma that were performed for the first time in Lithuania, Vilnius University Hospital Santariskiu Klinikos.Key words: taTME, rectal surgery, minimally invasive surgery Transanalinė totalinė mezorektalinė ekscizija (taTME) yra naujas endoskopinis natūralių angų chirurgijos būdas, susidedantis iš trijų tiesiosios žarnos chirurginių metodų. Šiame straipsnyje detaliai aprašoma taTME chirurginė technika bei pristatomos pirmosios trys taTME procedūros, kurios buvo atliktos Vilniaus universiteto ligoninėje Santariškių klinikose. Reikšminiai žodžiai: taTME, tiesiosios žarnos chirurgija, minimaliai invazinė chirurgija Originalūs mokslo tiriamieji darbai