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Biomedical subjects

D Beyer

Publications and source records attributed to D Beyer.

At least 91 records · Page 5Linked to original sources
PubMed1984

[Possibilities and limitations of computed tomographic staging of bladder carcinoma].

A retrospective analysis of 27 proven cases of bladder cancer was made comparing the CT-results and the histopathological staging made at TUR and/or cystectomy or at autopsy. In about 80% of the cases a differentiation between tumors only infiltrating and those penetrating the bladder wall was possible. Tumors only involving the bladder wall could not be further differentiated by CT(T1S-T3a). In the more advanced stages wall edema and/or fibrous reactions of the paravesical tissue caused difficulties in staging. As a non-invasive procedure CT should be used to stage bladder tumors as it can give additional information about the paravesical soft tissue and thus contributes to the adequate management of the tumor.

Adult↗
PubMed1984

[Initial findings with magnetic resonance tomography of mediastinal and hilar tumors].

Twenty-six tumours of the mediastinum and hilar regions were examined by magnetic resonance; the technique and initial experience in distinguishing normal from pathological appearances are described. ECG triggering has proved essential, whereas respiratory triggering was found to be unnecessary. Spin-echo images were found to be best for tumour delineation but, for further characterisation, the inversion recovery mode and multi-echo technique were most satisfactory. In general, the space-occupying lesion was seen as well as it would be with CT. The advantages of the new method are the excellent differentiation of vascular structures and the ability to image in multiple planes, whereas CT possesses better resolution which, in some cases, may be of diagnostic advantage.

Adult↗
PubMed1984

[Efficient procedure for diagnosing abdominal abscesses using imaging technics].

In 56 patients with abdominal abscess typical radiological abscess sings were analized to establish a rational and stepwise use of imaging procedures. Plain radiographs of the abdomen should be carried out at first because of their large diagnostic possibilities and standardized practicability. In addition with ultrasonography the diagnosis is possible in almost 90% of the cases. Contrast medium examination are rarely of diagnostic value. Computed tomography should be used in the remaining unclear cases and for planning of further surgical treatment.

Abdomen↗
PubMed1984

[Radiologic diagnosis of intra-abdominal abscesses by stepwise use of imaging procedures].

Plain radiographs of the abdomen in supine and left decubitus position were combined with additional contrast medium examinations, ultrasonography and computed tomography and used for diagnosis in 47 patients with surgically verified abdominal abscesses. Typical abscess signs were analysed to establish the stepwise use of imaging procedures. Diagnosis of an intraperitoneal or retroperitoneal abscess can be made in over 50% of the cases by accurate interpretation of abdominal plain films. If combined with ultrasonography, diagnosis is possible in even almost 90% of the cases. Computed tomography may additionaly show the exact localisation and extension of the lesion and is mainly used in planning further surgical treatment.

Abscess↗
PubMed1983

Absence of alpha-fucosidase activity in two sisters showing a different phenotype.

Two Austrian sisters with a different phenotype of fucosidosis are presented. The diagnosis was established by demonstrating complete alpha-L-fucosidase deficiency in the patients' liver as well as an increased excretion of oligosaccharides in the urine and an absence of alpha-L-fucosidase activity in skin fibroblasts of one patient. No correlation between enzyme activity and the different expression of the disease was found.

Carbohydrate Metabolism, Inborn Errors↗
PubMed1983

[Involvement of the colon in gastric and pancreatic processes].

Using representative case studies the diagnostic problems of colonic infiltration in cases of gastric and pancreatic neoplastic or inflammatory lesions are discussed. Typical signs in both barium enema and ultrasonography lead to the detection of secondary bowel wall lesions. Characteristic intraperitoneal pathways of spread and roentgen-morphologic features are important in the attempt to differentiate inflammatory from malignant infiltrations. In these cases ultrasonography, showing a diffuse thickening of gastric or bowel wall, is a useful additional diagnostic tool, which gives further information about topographical relations in the abdomen.

Adenocarcinoma, Scirrhous↗
PubMed1983

[Limits of differentiation of focal splenic lesions by sonography and computed tomography].

Based on the results of sonographic and CT-findings in 192 patients the advantages and disadvantages of ultrasonography and CT in the diagnosis of splenic lesions are presented with particular emphasis on anatomy and topography. The relatively uniform presentation of various focal lesions in ultrasonography and CT is demonstrated and the limits of differentiation are discussed. The importance of angiography and scintigraphy is also mentioned.

Abscess↗
PubMed1983

[Sonography of the superior mesenteric artery. Normal anatomy variations and value for the analysis of retroperitoneal space occupying processes].

The superior mesenteric artery (SMA) can be demonstrated by ultrasonography under adequate conditions as a tubular liquid structure of 3 to 7 mms. in diameter, which parallels the abdominal aorta at a distance of 2 to 5 mms. The aortomesenteric distance is higher in patients with arteriosclerosis or aneurysm of the abdominal aorta, enlarged pre-aortic lymph nodes or other retroperitoneal masses. Its measurement can be recommended for quantitative assessment of retroperitoneal lymphadenopathy. Anatomic variations and postoperative changes may alter the course of the SMA. Measurement of the aortomesenteric angle is of no practical value.

Adult↗
PubMed1983

Conventional roentgen diagnosis of mediastinal lymphadenopathy. Review article (Part two).

Although CT has significantly improved the imaging of space occupying mediastinal processes, it cannot be the first diagnostic step for reasons of cost, radiation exposure and capacity. Therefore, the conventional chest examination with biplane films, film tomography and esophagogram continues to be the basic roentgen procedure. The basis of the conventional studies is the analysis of the pleuro-mediastinal borders. This paper describes the roentgen-morphological aspects of enlarged lymph nodes in the mediastinal compartments as far as they can be detected with conventional studies. The differential diagnoses are discussed and recognition of early and discrete lesions is particularly emphasized.

Aorta, Thoracic↗
PubMed1983

[Extracolonic-infiltrative process of the sigmoid colon and the rectosigmoid junction].

The problems of extracolic-infiltrative lesions of the sigmoid colon and recto-sigmoid junction are discussed, based on representative case studies. Because of the localisation of these bowel segments in the lower peritoneal cavity, they can be reached by direct infiltration of contiguous tumors--especially carcinoma of the ovary--or by seeding into the pouch of Douglas and the sigmoid mesocolon. In many cases characteristic roentgen-morphologic features indicate a secondary infiltration, but inflammatory and malignant lesions have to be differentiated. The differential-diagnosis must consider also diverticulitis, endometriosis and extracolic growth of colonic carcinoma. Additional ultrasonography and computed tomography may help to clear topographical relations and to detect direct and indirect signs of peritoneal carcinomatosis and abscess.

Adenocarcinoma↗
PubMed1983

[Conventional diagnosis of lymphadenopathies--value of conventional roentgen examination and supplementation of other imaging technics].

The introduction of new imaging modalities, such as computed tomography and sonography, has not lessened the importance of conventional roentgen examinations of the chest as routine and screening procedures for detecting mediastinal lymph node disease. Precise understanding of the normal and pathologic anatomy of the mediastinum in conventional films is required for an early and adequate use of computed tomography and eventually abdominal ultrasonography as additional examinations. Only by this the involvement of mediastinal nodes by malignant lymphomas or metastases can be detected, proved and treated early. Chest films still are of greatest value for follow-up studies in both evident and suspected malignant thoracic lymph node disease.

Diagnosis, Differential↗