Search results for "rectum"
showing 10 items of 172 documents
Focal or whole-gland salvage prostate brachytherapy with iodine seeds with or without a rectal spacer for postradiotherapy local failure: How best to…
2016
International audience; PURPOSE: Salvage prostate permanent implant (sPPI) for postradiation local failure provides high rates of biochemical control. The cumulative dose delivered to the prostate and the rectum is still unknown. METHODS AND MATERIALS: We reviewed the postimplant CT-based dosimetry of 18 selected patients who underwent sPPI with I-125 seeds for isolated biopsy-proven local failure several years after external beam radiation therapy. Ten patients had whole-prostate sPPI, and 8 patients had multiparametric MRI-based focal sPPI. In 8 patients, hyaluronic acid (HA) gel was injected into the prostate rectum space. RESULTS: The median cumulative biological effective dose after EB…
Interobserver variability in rectum contouring in high-dose-rate brachytherapy for prostate cancer: A multi-institutional prospective analysis
2017
PURPOSE: The aim of this study was to evaluate the interobserver variability (KW) of rectum contouring, and its dosimetric consequences, for high-dose-rate brachytherapy in patients with prostate cancer across multiple institutions. METHODS AND MATERIALS: Five radiation oncologists contoured rectums in 10 patients on transperineal ultrasound image sets after establishing a delineation consensus. The D-0.1cc, D-1cc, and D-2cc rectum volume parameters were determined. The mean, standard deviation, and range of each dose-volume histogram parameter were evaluated for each patient. The JOY was determined using the coefficient of variation, and the dosimetric impacts on the total dose were analyz…
Unusual B cell morphology in inflammatory bowel disease.
2012
B lymphocytes express various different types of surface immunoglobulins that are largely unrelated to other hematological lines, although some reports have described a relationship between malignant B cells and other cells such as macrophages. Multiple genes of hematopoietic lineage, including transcription factors, are co-expressed in hematopoietic stem cells and progenitors, a phenomenon referred to as "lineage priming". Changes in the expression levels and timing of transcription factors can induce the lineage conversion of committed cells, which indicates that the regulation of transcription factors might be particularly critical for maintaining hierarchical hematopoietic development. …
Cryoablation of Human Colorectal Cancerin Vivoin a Nude Mouse Xenograft Model
1998
Abstract Objective: To establish the minimum required temperature in cryoablation of human colorectal cancer cell lines grown as subcutaneous tumors in mice. Methods: Male nu/nu nude mice were inoculated by a sc injection of 1 × 10 6 LoVo ( n = 30) or C170 ( n = 32) cells. After 2 weeks the tumors were frozen using a 3-mm cryotherapy probe (LCS 3000, Cryotech, UK) to temperatures ranging from −8 to −84°C. Results: (LoVo) Of 21 mice evaluable for analysis no tumors recurred in 3 mice which had their tumors frozen to less than −60°C as measured at the presumed tumor/host boundary, whereas all but one tumor recurred in 18 mice which had their tumors frozen to >−60°C. (C170) Of 18 mice evaluabl…
Severe rectal bleeding after transrectal US-guided prostate biopsy. Case report
2006
CASE: The Authors report their experience about a case of severe rectal bleeding after transrectal ultrasound-guided prostate biopsy. INTERVENTION: After correct and sure diagnosis, the patient was submitted to resolutive endoscopic haemostatic treatment (failure of haemostatic mechanical manoeuvres, emergency colonscopy, haemostasis with sclerotherapy, heat bipolar probe and Argon Plasma Coagulation). RESULTS: Complete recovery (immediate stop bleeding). Follow-up (1 year) negative. CONCLUSIONS: Rectal bleeding after prostate biopsy is a important but rare complication of prostate cancer screening, potentially lethal. Best knowledge of causes and risk factors may improve the diagnosis and …
Internal anal sphincter nerves - a macroanatomical and microscopic description of the extrinsic autonomic nerve supply of the internal anal sphincter.
2017
Background: The internal anal sphincter (IAS) contributes substantially to anorectal functions. While its autonomic nerve supply has been studied at the microscopic level, little information is available concerning the macroscopic topography of extrinsic nerve fibres. This study was designed to identify neural connections between the pelvic plexus and the IAS, provide a detailed topographical description, and give histological proof of autonomic nerve tissue. Methods: Macroscopic dissection of pelvic autonomic nerves was performed under magnification in seven (5 males, 2 females) hemipelvises obtained from body donors (67-92 years). Candidate structures were investigated by histological and…
Endoscopic laser palliation for rectal cancer-- therapeutic outcome and complications in eighty-three consecutive patients.
2002
OBJECTIVE The treatment of advanced rectal cancer is still a challenge. We analysed the short-term success, treatment-related complications and the long-term outcome after laser palliation for rectal cancer. METHODS Over a ten-years period eighty-three consecutive patients (median age 81 (46-94) yrs; 43 female) were treated mainly for obstructive symptoms or tumour bleeding. Laser palliation was performed using a Neodymium:Yttrium-Aluminium-Garnet (Nd:YAG) laser. RESULTS The immediate overall-success rate was 96.4 % (80 of 83 patients) and only one female received a diverting colostomy because of an inaccessible high-grade rectal stenosis, initially. During follow-up, eight additional patie…
Reversal of Hartmann's procedure: a single-centre experience of 533 consecutive cases.
2018
AIM Hartmann's procedure (HP) is common. However, restoration of intestinal continuity is not so frequent. The aim of this study was to determine predictive factors which might influence outcomes following the reversal of HP. METHOD All consecutive patients who underwent elective and emergency HP in a single institution between January 1999 and December 2014 were included. Data concerning patient, disease and treatment features were collected. Univariate and multivariate binary logistic regression models were used to determine prognostic factors. RESULTS A total of 533 consecutive patients underwent HP over the 16-year period. Factors that were associated with a higher probability of revers…
Evaluating the efficacy of current treatments for reducing postoperative ileus: a randomized clinical trial in a single center.
2014
AIM: Postoperative ileus has been considered an inevitable consequence of abdominal surgery. The aim of the study was to investigate the efficacy of same treatments in resolving postoperative ileus in various surgical approaches. METHODS: A total of 360 patients underwent abdominal surgery, and was divided into four groups: videolaparoscopic cholecystectomy, laparotomic colo-rectal surgery, laparotomic Hartmann procedure, laparotomic gastric surgery. In each group, patients received different postoperative treatments: chewing gum, olive oil, both, and water. Each group was compared with a control group. RESULTS: In patients who underwent videolaparoscopic cholecystectomy, median postoperati…