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Biomedical subjects

M Schratter

Publications and source records attributed to M Schratter.

54 records · Page 3Linked to original sources
PubMed1986

[Significance of computerized tomography in middle ear diagnosis].

Due to the important improvement represented by the latest computed tomography (CT) technology in respect of detail and excellent contrast resolution normal and pathological structures of the inner and middle ear can be visualised. The clinical and diagnostic value of CT in comparison to standard x-rays and tomography is prospectively evaluated on the basis 74 patient examinations. Today CT is unsurpassed in the diagnosis of cholesteatomas and glomus tumours and ranks first among all imaging modalities. Chronic inflammatory diseases and deformities of the middle ear can be evaluated in most cases on the basis of standard x-rays and tomography. The importance of CT is primarily complementary, except in preoperative cases. Fractures should be visualised first via standard x-rays. In cases of questionable complications (e.g. tympanic or intracranial haematomas), CT should be the next step. Conventional tomograms are not necessary.

Adolescent↗
PubMed1986

[Computerized tomography in the acute diagnosis of spinal injuries].

Additional to conventional x-ray examinations, high-resolution CT has a greater impact on the diagnostic evaluation of severe spine injuries. It allows exact judgment of the condition of vertebral arch, articular processes, joints and spinal axis and therefore a better delineation of the stability or instability of spinal fractures. Intraspinal fracture of spinal stenosis and intra or paraspinal soft tissues lesions are much more easily detected. For this reasons CT-evaluation of severe spinal traumata permits earlier, much more precise and in many cases successful therapy.

Adolescent↗
PubMed1986

[A method for puncturing the deep neck muscles in humans].

The authors developed a method to puncture neck muscles by means of computer tomographic control, enabling the introduction of an electrode into the obliquus capitis inferior muscle, to investigate the particular role of neck muscles in posture and head movement.

Electromyography↗
PubMed1986

[CT of the sella following hypophyseal surgery].

A CT control scan of 32 patients after transsphenoidal resection of a pituitary tumour revealed sellar contents of different density and varying extent. Additional criteria were used to differentiate the intrasellar structures (size, extent, shape, structure, contrast enhancement, bone changes). CT made the definite diagnosis in 6 patients with pituitary tumour recurrence. Hormonal measurements were superior to CT in identifying recurrent tumours in another 3 patients. It is concluded that hormonal methods should be used in evaluating patients after surgery of a hormone-producing tumour. However, CT is the most useful method in detecting tumour recurrence in patients with non-functioning adenomas, and, if an adequate technique is used (coronal scanning, iv-contrast), even clinical asymptomatic tumours can be identified.

Adenoma↗
PubMed1985

[Mediastinal CT-staging of bronchial carcinomas].

Forty-three patients with proven bronchogenic carcinoma were evaluated with computed tomography (CT) to search for mediastinal and broncho-pulmonary nodal metastases. Definitive staging was achieved by thoracotomy (34 patients) and mediastinoscopy or transbronchial nodal sampling (9 patients). Three parameters of lymph node appearance on CT were studied to improve the sensitivity and specificity of CT in detecting malignancy in bronchogenic carcinoma: 1) node size, 2) node location and 3) border regularity and definition. 762 clearly defined nodes were studied by CT - 391 metastatic and 371 non metastatic. The most useful CT parameters were node size over 10 mm, and node location, which results in a sensitivity of 80% and a specificity of 88%. A combination of all 3 CT parameters increased sensitivity to 82% and specificity to 90%. These results show clearly, that size is not the only relevant CT-parameter in successful preoperative identification of mediastinal nodal metastases.

Aged↗
PubMed1985

[Occult fractures of the skull].

Fractures of the skull represent a problem in traumatologic X-ray-diagnosis. The higher rate of errors in the skull compared with the rest of the skeleton result from problems in differentiation of fracture-lines from vascular channels and impressions in overlying skeletal structures. By special examination of the suspected region (special X-ray-views, conventional tomography, CT, magnification views etc.) additional information can be obtained, e.g., exact demonstration of dislocated bone fragments or the detection of intracranial hematomas as well as the unmasking of the fracture lines and their dimensions. Very often these special procedures results are the basis for correct treatment. For various skull regions, where masked fractures often occur, recommended radiological pathways are presented in order to find these fractures and to obtain additional information.

Adolescent↗
PubMed1984

[Role of computed tomography in malignant tumors of the oral cavity and pharynx].

The CT findings of 22 patients with histologically verified malignant tumors of the oral cavity and pharynx were evaluated to demonstrate the value of CT. Comparison with conventional radiological methods was made. In 16 patients an attempt was made to define tumor expansion and 6 patients were examined after surgery and radiation therapy with regard to tumor recurrence. In the first group we found tumors of different stages: in advanced cancer it was evident that with CT it is possible to describe tumor expansion very exactly and its relationship to surrounding structures, as well as the invasion of the intracranial space or spinal cord. In malignomas of the tongue and mouth floor measurements of size by CT were very precise, as proved by surgery. Our results in the first group of patients show, that CT has a great influence on therapeutic management and is also very important for clinical staging of these malignomas. In the second patient group it is shown that by CT differentiation between postoperative changes and recurrent tumor is as difficult as it is in other organs. Based on the postoperative examination, appropriate follow-up is necessary.

Adult↗
PubMed1983

[Sonographic problems in the assessment of abdominal aortic aneurysms].

Ultrasound has taken a solid position in the diagnostic management of aneurysms of the abdominal aorta as it is a non-invasive, simple and quickly practicable method with a low expenditure. After clinical examination ultrasound holds the second place in the sequence of various diagnostic procedures in the case of an aneurysm of abdominal aorta. Diagnostic problems are demonstrated in the sonographic judgement of aortic aneurysms. 42 patients with an abdominal aortic aneurysm have been evaluated in relation to the sonographic features of the aneurysm.

Aged↗
PubMed1983

[Radiological contribution to skeletal changes in systemic mastocytosis. Urticaria pigmentosa].

Three patients are demonstrated suffering from systemic mastocytosis with skin and skeletal involvement. History, clinical and radiological results are reported. After a brief analysis of the pathogenetic mechanism, the radiological findings on the skeletal system in systemic mastocytosis are discussed. Finally, roentgenological differential diagnosis of the osseous lesions is explained.

Adult↗
PubMed1979

[Mesothelioma of the peritoneum with pulmonary metastases (author's transl)].

Report of the case history of a female patient suffering from malignant mesothelioma of the peritoneum. Exceptional findings were a dense nodular hematogenic dissemination over both lungs and the duration of disease, which till now extends over 35 months. Pathogenesis, course of disease, diagnosis therapy and epicrisis are discussed.

Adult↗
PubMedDate not supplied

[CT in the surgical planning in tumorous processes of the sacrum].

The value of CT in the preoperative management of tumors of the sacrum is demonstrated. Essential informations for treatment planning are: involved sacral segment, infiltration of sacral foramina and nerve roots, involvement of the sacroiliac joints, ingression of the lumbar spine, infiltration of the pelvic organs and vessels, sciatic nerve and the dorsal soft tissues. In order to prove the competence of the CT in answering these questions we evaluated the CT-examinations of 30 pat. with 14 primary tumors, 9 metastatic tumors and 7 tumors involving secondary the sacrum. The CT findings were correlated with clinical symptoms and surgical reports in 11 pat., with clinical symptoms alone in 19 pat. There was good correlation in the criterias: location and number of involved segments (8/11, 17/19), infiltr. of SI-joints (11/11), infiltr. of lumbar spine (9/11, 18/19), and infiltr. of pelvic organs (10/11), worse correlation in the criterias: nerve root-involvement (2/11, 3/19), and sciatic nerve-infiltr. (7/11, 15/19). Our conclusions are that CT gives helpful preoperative informations deciding about extent of surgical procedure, and surgical approach. The major problem, however, consist in diagnosis of nerve root and sciatic nerve involvement, therefore in poor prediction of postoperative conservation of neural functions. The knowledge of CT-anatomy of sacrum- and important condition for correct segment-location of the tumor is refreshed by outlines of characteristic segmental CT-sections of the sacrum.

Adult↗
PubMedDate not supplied

[Determination of intramedullary extension of osteosarcomas using CT with special reference to the epiphyseal groove].

In a study of 21 patients with osteogenic sarcoma of the apendicular skeleton proven by biopsy, the diagnostic value of computed tomography (CT) for the assessment of intramedullary tumor growth, epiphyseal and joint involvement was determined. CT findings were correlated with histopathologic findings. 10 of the 21 tumors were located far from the epiphysis, in 11 cases the epiphysis was infiltrated. Tumorous involvement of the articular cartilage occurred in 3 patients, in one case the tumor extended beyond the joint. In 85% of the cases the CT report concerning tumor location in regard to the epiphysis was verified histologically. In 3 cases CT overestimated tumor extension.

Adolescent↗
PubMedDate not supplied

Aspiration cytology, immunocytochemistry and electron microscopy of a malignant peripheral neuroectodermal tumor. A case report.

The findings of fine needle aspiration (FNA) cytology, immunocytochemical staining and electron microscopy (EM) in a case of malignant peripheral neuroectodermal tumor (PNET) presenting as a soft tissue mass in the lateral abdominal wall are reported. The immediate evaluation of the aspirate revealed cells of a small round cell malignant tumor. To provide a specific preoperative diagnosis, additional cytologic material was aspirated for immunocytochemical and ultrastructural investigations. While the results of EM were nonspecific, allowing only the exclusion of other small round cell malignancies, immunocytochemical staining of the aspirate was suggestive of a PNET. The diagnosis of PNET was corroborated by histopathologic and immunohistochemical findings. This case indicates that an exact preoperative categorization of small round cell malignant tumors can be made by FNA biopsy in otherwise equivocal cases when immunocytochemical and ultrastructural techniques are also utilized.

Abdominal Muscles↗