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Biomedical subjects

M A Ortner

Publications and source records attributed to M A Ortner.

8 recordsLinked to original sources
PubMed2006

[Klatskin tumors--diagnostic and interventional therapy].

Klatskin tumors are defined as malignant tumors of the bile duct involving the bifurcation and intrahepatic bile ducts. The most common presenting clinical feature, obstructive jaundice, usually occurs with advanced disease. Diagnostic tools currently available are therefore either performed too late or are not able to detect early disease stage. Imaging procedures for diagnosis and staging are ultrasonography, magnetic resonance imaging with cholangiopancreaticography, intravenous bolus-enhanced spiral computed tomography and endoscopic retrograde cholangiopancreaticography. Before initiating any palliative measure, a proper staging and a surgical consultation at a hepatobiliary center is necessary. To assess resectability, additional diagnostic methods like angiography, positron emission tomography, cholangioscopy, endoscopic or intraluminal ultrasonography and finally even explorative laparoscopy may be required. At time of diagnosis only a small percentage of Klatskin tumors is curative resectable. Therefore, palliative treatment options play an important role. Endoprostheses insertion is the method of choice to relieve jaundice. Although it improves quality of life, it does not seem to improve survival time. Definitive evidence for a benefit of additional radio and/or chemotherapy is still missing. Photodynamic therapy, a light therapy, is the first approach leading to an improvement of cholestasis and quality of life as well as to a prolongation of survival time. PDT should therefore be offered to all patients with nonresectable cholangiocarcinoma.

Bile Duct Neoplasms↗
PubMed2006

[Contribution of endoscopy in palliative oncology (endoprosthesis, photodynamic therapy, parenteral nutrition].

The aim of this review is to give an overview of palliative endoscopic treatment options in patients with advanced cancers of the esophagus, stomach, pancreas and bile ducts. With regard to esophageal cancers, we will also speak about curative endoscopic treatment (photodynamic therapy, mucosectomy) of early cancers and dysplasias. We will not approach to this subject in other types of carcinoma, since this has already been covered by the acquisitions of the last years.

Carcinoma↗
PubMed2005

Is early endoscopy in the emergency room beneficial in patients with bleeding peptic ulcer? A "fortuitously controlled" study.

BACKGROUND AND STUDY AIMS: In previous randomized trials, early endoscopy improved the outcome in patients with bleeding peptic ulcer, though most of these studies defined "early" as endoscopy performed within 24 hours after admission. Using the length of hospital stay as the primary criterion for the clinical outcome, we compared the results of endoscopy done immediately after admission (early endoscopy in the emergency room, EEE) with endoscopy postponed to a time within the first 24 hours after hospitalization, but still during normal working hours ("delayed" endoscopy in the endoscopy unit, DEU). PATIENTS AND METHODS: We conducted a retrospective analysis of data from 81 consecutive patients with bleeding peptic ulcer admitted in 1997 and 1998 (age range 16 - 90 years). Of these 81 patients, 38 underwent DEU (the standard therapy at the hospital) and 43 underwent EEE. Patients in the two groups were comparable with regard to admission criteria, were equally distributed with respect to their risk of adverse outcome (assessed using the Baylor bleeding score and the Rockall score), and differed only in the treatment they received. Endoscopic hemostasis was performed whenever possible in all patients with Forrest types I, IIa, and IIb ulcer bleeding. RESULTS: We found similar rates in the two groups for recurrent bleeding (16 % in DEU patients vs. 14 % in EEE patients), persistent bleeding (8 % in DEU patients vs. none in EEE patients), medical complications (21 % in DEU patients vs. 26 % in EEE patients), the need for surgery (8 % in DEU patients vs. 9 % in EEE patients), and the length of hospital stay (5.1 days for DEU patients vs. 5.9 days for EEE patients). None of the differences between the two groups in these parameters were statistically significant. None of the patients died. CONCLUSIONS: Early endoscopy in an emergency room did not improve the clinical outcome in our 81 consecutive patients with bleeding peptic ulcer.

Adolescent↗
PubMed2002

[Reflux disease: conservative therapy].

Gastroesophageal reflux disease--one of the most common gastroenterological disorders--is characterized by reflux symptoms (occasionally respiratory symptoms or laryngeal complaints) and/or mucosal lesions. Improvement of symptoms and thus of the quality of life, prevention of relapse and of complications are the most important aims of short and long term treatment. Proton pump inhibitors are superior to histamine receptor antagonists and are the treatment of choice. Relapses occur in about 75% of patients within one year after stopping of acute treatment. The treatment strategy depends on the severity of symptoms and esophageal lesions. Patients with mild esophagitis or endoscopic negative disease can be treated with proton pump inhibitors on demand. In severe and complicated cases, the uninterrupted long-term use of proton pump inhibitors is indicated. In these cases laparoscopic fundoplication could be a possible--albeit problematic--alternative. New endoscopic interventional therapies should only be used in controlled studies. Their role in the treatment of GERD will only be known in a few years when adequately controlled long term studies will be available.

Anti-Ulcer Agents↗
PubMed2000

Photodynamic therapy of cholangiocarcinoma cancer.

Prognosis of nonresectable cholangiocarcinoma is not good, and in Bismuth type III and IV tumors relief of jaundice is seldom achieved, despite successful endoprosthesis insertion. Additional photodynamic therapy seems to be a promising new approach to these tumors. First pilot studies show relief of jaundice, mainly because of opening of the intrahepatic ducts and improvements in quality of life indices. Survival time seems to be long; however, randomized studies are necessary to confirm these results.

Bile Duct Neoplasms↗
PubMed1999

De novo hemolytic uremic syndrome postrenal transplant after cytomegalovirus infection.

After renal transplantation, hemolytic uremic syndrome (HUS) may occur as recurrent disease or de novo. Here, we describe the de novo occurrence of HUS immediately after the onset of primary cytomegalovirus (CMV) disease in two renal allograft recipients. Patient no. 1 had primary CMV disease with biopsy-proven CMV esophagitis 2 months after transplantation. Patient no. 2 experienced primary CMV disease with fever and leukopenia 8 years after transplantation. Both patients were treated with intravenous ganciclovir. Both patients developed HUS with biopsy-proven thrombotic microangiopathy in the renal allograft only a few days (3 to 5 days) after the onset of CMV disease. The short interval between the onset of CMV disease and HUS, as well as the parallel course of CMV viremia and HUS in both patients, indicate there may be a pathophysiological link between both diseases. However, because antiviral therapy with ganciclovir was started before the onset of HUS in both patients, we cannot definitely rule out that HUS was triggered by ganciclovir.

Adult↗
PubMed1998

Photodynamic therapy of nonresectable cholangiocarcinoma.

BACKGROUND & AIMS: Successful treatment in nonresectable Bismuth type III and IV cholangiocarcinoma is seldom achieved. The aim of this study was to evaluate the effect of photodynamic therapy on cholestasis, quality of life, and survival in these patients. METHODS: Nine patients with advanced nonresectable cholangiocarcinomas Bismuth type III and IV, who showed no sufficient drainage (bilirubin decrease <50%) after endoscopic stent insertion, underwent photodynamic therapy. Two days after intravenous application of a hematoporphyrin derivate, intraluminal photoactivation was performed cholangioscopically. Serum bilirubin, quality of life, and survival time were assessed in two monthly intervals after photodynamic therapy. RESULTS: After photodynamic therapy, bilirubin serum levels declined from 318 +/- 72 to 103 +/- 35 micromol/L (P = 0.0039) with no significant increase during the two monthly follow-ups. Quality of life indices improved dramatically and remained stable (e.g., Karnofsky index from 32.2% +/- 8.13% to 68.9% +/- 6.1%; P = 0.0078). Thirty-day mortality was 0%, and median survival time was 439 days. CONCLUSIONS: This study provides clear evidence that photodynamic therapy is effective in restoring biliary drainage and improving quality of life in patients with nonresectable disseminated cholangiocarcinomas Bismuth type III and IV. Compared with published data, survival time seems to be prolonged.

Bile Duct Neoplasms↗