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Biomedical subjects

G Ries

Publications and source records attributed to G Ries.

At least 55 records · Page 3Linked to original sources
PubMed1985

[Endocavitary radiotherapy in an after-loading technic in malignant stenoses of the upper gastrointestinal tract and bile ducts].

Palliative brachytherapy with 192iridium in high dose rate technique was applied until August 1985 in 44 patients: 40 suffering from an inoperable malignant stenoses of the esophagus or cardia, and 4 from bile duct carcinomas located in the upper part of the duct. The patients with malignant stenoses of the upper gastrointestinal tract underwent laser therapy until an endoscope could be passed beyond this stenoses. Then an after-loading tube was placed endoscopically and the stenoses irradiated endocavitarily (7/Gray/session in 1 cm distance). In the patients with malignant bile duct obstruction a PTCD-catheter served to guide the iridium wire up to the stenotic region.

Adenocarcinoma↗
PubMed1985

The RENT-project: radiobiological results and planned clinical application.

Various preclinical tests have been performed to determine the properties of fast neutrons of a mean energy of 2 MeV produced by an U-235 converter plate in the research reactor of the Technical University of Munich. Experiments have been carried out using two specific beams denoted as RENT I and RENT II (RENT stands for Reaktor Neutron Therapy). RENT II is the unmodified beam with a dose rate of 65 rd/min and a gamma-contamination of nearly 50% in 2 cm depth of a perspex phantom. In RENT I the gamma-component is reduced to 25% after filtration of the beam with 2.5 cm lead, whereas the total dose rate is reduced to 22 rd/min.

Animals↗
PubMed1984

[Peripheral soft tissue sarcomas. A retrospective study on 90 primary treatment patients].

Between 1960 and 1982, 90 patients treated primarily for peripheral soft tissue sarcomas received a postoperative irradiation at the Irradiation Department of the Städtische Krankenhaus Passau. Five patients (6%) were inoperable for internistic reasons and were treated only by radiotherapy. The local recurrence rate after combined therapy was 26%. 44% of the patients (40/90) developed metastases, preponderantly in the lung and within the first year (70% each). The age-corrected survival rate was 63% after five years and 43% after ten years in 79 patients with complete postoperative irradiation. Important prognostic factors are the degree of malignancy (five-year survival times of 57 patients: almost 90% for G1 tumors, 50% for G2 tumors, and 17% for G3 tumors, statistically significant) as well as the completeness of surgery. It is shown by the available results that conservative surgical interventions combined with radiotherapy are not less effective than more radical operations.

Adolescent↗
PubMed1983

[Value and possibilities for the improvement of hysterosalpingography].

The diagnostic results of hysterosalpingography and laparoscopy were compared (30 patients). Agreement between the methods was found in 73%. In 17% of the women, findings seen on hysterosalpingography, could not be confirmed at laparoscopy. Conversely, in 10% of negative hysterosalpingograms, adhesions were found at laparoscopy. Possible causes for these differences are discussed. At present three different methods are used for hysterosalpingography. Compared with a metal cannula or a Foley catheter, the use of a baby's feeding tube resulted in a reduction of tubal spasm. A reduction in screening time and consequent decrease in gonadal radiation is possible without loss of diagnostic information.

Female↗
PubMed1983

[Nuclear magnetic resonance tomography in gynecologic tumors].

The article discusses initial experiences of NMR examinations of carcinoma of the uterus and cervix uteri (resistive magnet, NMR prototype of Siemens). All examined carcinomas show prolonged relaxation times. Variation of measurement parameters results in good optical presentation of carcinoma tissue in the resonance scans. The results are compared with those of CT-scans and in one case with the site of the operation.

Adenocarcinoma↗
PubMed1983

[Recurrent ameloblastoma of the upper jaw--diagnosis].

Ameloblastomas of the jaw are rare epithelial tumors. They have to be differentiated from simple cysts and malignant tumors. If incompletely excised they have a high recurrence rate so that radical surgery from the beginning must be the therapy of choice. Exact preoperative diagnosis of the tumor and its possible spread into the infratemporal fossa or the pterygopalatine fossa, into the parapharyngeal space, the orbit or into the intracranial space is mandatory. In this paper we present a case with recurring ameloblastoma. The value of the different diagnostic procedures is discussed.

Aged↗
PubMed1982

[Diagnosis of renal involvement in malignant lymphomas (author's transl)].

The article describes involvement of the kidneys in 2 patients suffering from malignant lymphoma. In the first patient, small nodular infiltrates are seen in the symmetrically enlarged kidneys. In the second patient, a large, intrarenally growing tumour can be observed on the right, whereas on the left side an abdominal lymphatic node can be seen growing into the kidney. At the same time, there are lymphatic infiltrates of different size in both kidneys. The diagnosis is basically established by computerised tomography combined with visualisation of enlarged abdominal lymphatic nodes, both kidneys being involved; at the same time, the intrarenal infiltrates are found to possess a density which largely corresponds to that of the surrounding lymph nodes.

Female↗
PubMed1981

Computed tomographic demonstration of venous thrombosis of different etiologies.

Typical computed tomographic signs of venous thrombosis include the demonstration of the hypodense center (20 to 45 HU) in the involved blood vessel with a hyperdense margin surrounding it. CT represents a reliable method of diagnosis complimentary to that achieved by venography. CT examination allows the visualisation of the proximal end of the thrombus and gives the etiology of the thrombus. Venous thromboses occurring for the first time demonstrate a well defined borderline around the vein with a lack of reaction in the surrounding tissue. On the other hand, recurrent venous thrombosis is characterized by an inhomogenous zone of higher density in the perivascular region. A similar image can be obtained in secondary thrombosis due to inflammatory changes from adjacent tumours. In cases of thrombosis with tumour involvement, the tumour can be demonstrated.

Adult↗