Transanal endoscopic surgery with a 3D printed device.

BACKGROUND: The aim of this study was to investigate the effectiveness of devices manufactured with 3D printing for performing transanal endoscopic procedures without pneumorectum. METHODS: Functional devices were designed in the Polytechnic School of Engineering of Gijón from 2016 to 2018 using three-dimensional (3D) solid modelling software (Solid-Works®), that allows customization of the device (diameter and length). The devices were made in acrylonitrile butadiene styrene (ABS) by additive manufacturing using an HP Designjet 3D Printer, with fused deposition modelling (FDM) technology. Tests were carried out on mixed simulators (with viscera) and cadavers with a prototype in the form of an open cylindrical base ellipsoid spindle with two bars. In this paper, we present the information of the first series of patients in which this device has been used to perform a full-thikness endoscopic resection of the rectal wall without pneumorectum. The characteristics of the patients, size, and location of the lesion, the type of anesthesia used, the duration of the procedure, hospital stay, complications, and pathology were analyzed. An endoscopic follow-up was also carried out for at least 2 years. RESULTS: Seven interventions were carried out in six patients. The lesions were located at a mean distance of 5 cm from the anal verge and an average area of 11.8 cm2. Four of the procedures were performed with general anesthesia and 3 with spinal anesthesia. Histopathology examination identified 3 adenomas, 3 pT1 and 1 pT2 adenocarcinomas. All excisions were full thickness. En bloc excision was possible in all cases. In only one case of a benign polyp there was a positive lateral margin. As regards complications, there was one case of postoperative rectal bleeding without the need for transfusions. There were no readmissions and no postoperative mortality. CONCLUSIONS: An innovative device made with a 3D printer can be used successfully in transanal endoscopic resections of the rectal wall, with spinal anaesthesia and avoiding the need for pneumorectum.

Hepatic metastases of granulosa cells tumour of the ovary.

A case of metastatic granulosa cell tumour of the ovary is reported. Investigations revealed a secondary tumour in segment VI and VII of the liver. Right hepatic resection was performed. Microscopic findings revealed a tumour with histological features identical to that removed eleven years before.

[Digestive hemorrhage caused by jejunoileal tumors]. / Hemorragia digestiva por tumoraciones yeyunoileales.

Between January-73 and February-92 twelve patients with digestive hemorrhage due to primary jejunoileal tumors were treated. Eight cases had rectal bleeding and four chronic gastrointestinal hemorrhage as first clinical manifestation. Patients underwent upper endoscopy, colonoscopy and barium enema. Three out of nine barium meals (33%), two out of four ultrasonographies (50%) and eight out of nine arteriographies (89%) were abnormal. The barium meals showed submucosal lesions on two occasions and a jejunal luminal mass. The ultrasonography detected two intrabdominal masses. All arteriographies, except one with extravased intestinal contrast and other which showed a hypovascular zone, depicted homogeneous hypervascular images. All patients were operated on. Seven segmental enterectomies, four limited resections and a polipectomy were performed. Seven tumours were found in the jejunum, three in the jejunoleum and two in the ileum. There were four leiomyosarcomas, three leiomyomas, two polyps, one leiomyoblastoma, one adenocarcinoma and one lymphoma. Rebleeding and mortality were absent.

[Mesenteric fibromatosis]. / Fibromatosis mesentérica.

We report a patient with mesenteric fibromatosis, a rare entity in our environment resulting in rectal stenosis which required resection and a Hartman operation. The features of this disease are reviewed.