Background The purpose of this study was to investigate the potential of a combination of 3D mixed-reality visualization of medical images using CarnaLife Holo (MedApp, Poland) system as a supporting tool for innovative, minimally invasive surgery/irreversible electroporation—IRA, Nano-Knife), microwave ablation (MWA)/for advanced gastrointestinal tumors. Eight liver and pancreatic tumor treatments were performed. In all of the patients undergoing laparoscopy or open surgery volume and margin were estimated by preoperative visualization. In all patients, neoplastic lesions were considered unresectable by standard methods. Methods Preoperative CT or MRI were transformed into holograms and displayed thanks to the HoloLens 2. During operation, the surgeon’s field of view was augmented with a 3D model of the patient’s relevant structures. Results The intraoperative hologram contributed to better presentation of tumor size and locations, more precise setting of needles used to irreversible electroporation and for determining ablation line in case of liver metastases. Surgeons could easily compare the real patient's anatomy to holographic visualization just before the operations. Conclusions The combination of 3D mixed-reality visualization using CarnaLife Holo with IRA, MWA and next systemic treatment (chemotherapy) might be a new way in personalized treatment of advanced cancers.

Aim: The aim was to determine the outcome from percutaneous sclerosing treatment of solitary non-parasitic hepatic cysts. Methods: The results of treatment of patients with symptomatic solitary non-parasitic hepatic cysts treated between 1995 and 2000 were reviewed. Results: There were 23 women and one man with a median (range) age of 59 (34–79) years. The median (range) diameter of the cysts was 10 (5–24) cm. Five patients were treated by laparoscopic fenestration ab initio as they also required a cholecystectomy because of gallstones. The remaining 19 patients underwent percutaneous sclerotherapy. In one just aspiration was successful without further treatment. In six contrast leaked from the cyst and five of these had laparoscopic fenestration. Twelve patients had sclerosant treatment with good results at a median (range) follow-up of 35 (6–60) months in 10 patients. Good results were also obtained in 10 of the 12 patients who had fenestration.

The aim of the study was to present our experience with the use of intraoperative colonoscopy in patients with obstructing colon cancer in whom complete preoperative colonoscopy was not possible. Material and methods. We treated 480 patients with colon cancer from 2002 to 2008 in our department. In 80 patients (28 female and 52 male) we performed intraoperative colonoscopy due to obstructing colon cancer. Mean age of female patients was 67.8 yrs. (35-84 yrs.) and mean age of male patients was 66.5 yrs. (38-81 yrs.). In all of the patients preoperative complete colonoscopy was not possible. Results. Thanks to intraoperative colonoscopy we revealed new synchronous cancer lesions in 7 patients (8.75%) and therefore we extended the operation. In 28 patients (35%) we revealed polyps which, in 24 (85.7%) cases, were removed endoscopically and in 4 cases we decided to extend the operation. Conclusions. Intraoperative colonoscopy is effi cient method in diagnosis of colon cancer especially in patients with obstructing colon cancer. Thanks to intraoperative colonoscopy patients with synchronous lesions may benefi t from detection of lesions and avoid further operation.