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Biomedical subjects

T Riebel

Publications and source records attributed to T Riebel.

At least 37 records · Page 2Linked to original sources
PubMed1990

[Deterioration of clinical findings in hip joint follow-ups in neonatal screening].

6 per cent out of 4290 hips checked by neonatal ultrasound screening could be reexamined later on. 7 of 200 hips (i.e. 4 per cent), primarily categorized as type IIa, showed an unexpected severe deterioration to type D (n = 3) or even to type IIIa (n = 4) after a mean-time of 9 weeks. Additional 5 cases with similar unfavourable courses from IIa to IIc, D or IIIa, and even 3 initially normal hips, changing to type IIa, were seen in another screening material (not yet systematically analyzed). Reasons for possible initial misinterpretation (purely visual evaluation in most cases, uncertainties in measuring suboptimal sonographic cuts, deficiencies in technical equipment and documentation), equivocal classification of border-line sonograms as well as possible influence of additional risk factors are discussed. Routine sonographic re-examinations after 6 (to 12) weeks are recommended as obligatory for all hips.

Diagnosis, Differential↗
PubMed1987

Spermatic venography in undescended testes.

In patients with undescended testes the demonstration of the pampiniform plexus (i.e. venous network surrounding the testis) by selective retrograde contrast filling of the internal spermatic vein gives exact information about the existence and localization of the gonadal tissue. Especially with small hypoplastic testes and/or an intraabdominal position of the gonad the results of this technique are superior to those of ultrasound and computed tomography. The venographic information often helps to reduce the extent of the surgical exploration, most of all in those cases in which after an ineffective first procedure a second operation is planned. Venography can be done on an outpatient basis in children from an age of about 6 years upwards without general anesthesia and serious complications. Personal experiences with the spermatic venography in 11 patients (age: 7-32 years) with 18 undescended testes are demonstrated. Comparing the roentgenologic and surgical findings in 7 patients with 12 explored veins the results corresponded completely in 75%. In the remaining cases roentgenologic demonstration of one of the testicular veins with its pampinifom plexus suggested important information about the localization of the contralateral testis, surgically confirmed later.

Adolescent↗
PubMed1986

[Vascular supply of the rectum in anal atresia. Angiography studies in newborn swine].

In 15 piglets with anorectal malformations (high and low anomalies) we performed angiographies of the pelvic arterial system. 3 healthy animals were used as control group. None of the animals had isolated rectal atresia which is assumed to be due to vascular disorders. In all animals we could demonstrate normal superior and inferior rectal arteries. Thus our results support the hypothesis that anorectal malformations, with the exception of isolated rectal atresia, are not associated with vascular malperfusion during embryogenesis.

Angiography↗
PubMed1986

[Comparative x-ray and nuclear medical studies of osteosarcomas to evaluate the effectiveness of preoperative chemotherapy].

In 16 patients with a long bone osteosarcoma treated after the therapy regimen of COSS 80/82 (Cooperative Osteosarcoma Study) the tumour response to preoperative chemotherapy was assessed by conventional roentgenograms (plain films, tomograms, angiograms). The histological grade of regression determined in the operative specimen was used as a reference for the extent of tumour devitalisation. By their different typical roentgenological course the osteosarcomas with a very good and those with a rather poor response could be correctly identified (100%). On following the clinically used differentiation between "good responders" (histological grades I to III) and "poor responders" (grades IV to VI) the corresponding classification of these tumours by roentgenograms and functional scintigraphic imaging was found to be correct in 94% of the cases. The coincidence of the correct as well as the false results in both radiological methods was as high as 100% if those osteosarcomas showing only a "medium response" in their roentgenograms were added to the clinical group of good responders. There were no fundamentally discrepant results obtained by each of the two radiological techniques. With the combined workup of the roentgenological and the scintigraphic material any incorrect preoperative estimation of tumour regression with a harmful influence on therapy (date and type of surgery, mode of postoperative chemotherapy) could be avoided.

Adolescent↗
PubMed1985

De Barsy syndrome--an autosomal recessive, progeroid syndrome.

We report two families with seven siblings with de Barsy syndrome. Characteristic features include severe mental retardation, hypermobility with athetoid movements, grimacing, muscular hypotonia, laxity of small joints and brisk deep tendon reflexes, progeroid aspect with cutis laxa, atrophy of skin with hyperpigmentation, isolated depigmentations, reduction of subcutaneous fatty tissue, translucent vein pattern, short stature, frontal bossing in the young child, large prominent ears with dysplastic helices and corneal clouding or cataracts. The syndrome probably has autosomal recessive inheritance.

Abnormalities, Multiple↗
PubMed1985

[Comparison of x-ray and histological findings in osteosarcomas following preoperative chemotherapy].

Since the introduction of pre-operative chemotherapy, osteosarcomas have shown a more favourable prognosis. Reaction of the tumour due to chemotherapy is judged pre-operative primarily by radiology (plain films, angiography, CT, scintigraphy). There is little evidence concerning the radiological appearances after pre-operative chemotherapy and morphological changes, particularly in respect of tumour regression. Specific radiological changes were therefore compared with pathological findings following chemotherapy and operation in 17 patients with osteosarcomas. Tumours were examined which showed radiological evidence of intra-and extra-osseous sclerosis or lysis and which still were classified as vital tumour tissue. Tumour planes were reconstructed from large histological sections of the operative specimen and compared with the radiological appearances. Sclerosis was found to be due to reactive new bone formation or to mineralisation of the osteosarcomatous tissue. Lysis correlated with persistent vital tumour, or in connective tissue. Nine out of ten cases, regarded as vital on radiological evidence, showed vital tumour cells on histological section. Lyses and scleroses were not reliable indications of the pre-operative state of the osteosarcoma following chemotherapy. On the other hand, combined qualitative radiological criteria for assessing tumour vitality, proved to be helpful.

Adolescent↗
PubMed1985

[Torsion of a wandering spleen].

The torsion of an ectopic (= wandering) spleen is a rare entity especially in children. Clinically it presents either with signs of an "acute abdomen" or as a fairly painful abdominal "tumor" of the chronic recurrent type. Ultrasonography, arteriography, and additional scintigraphy in special cases are of greatest value in the preoperative diagnostic management. Splenopexy, sometimes after resecting parts of a very enlarged organ, is the therapy of choice. The complete exstirpation of the ectopic spleen should be reserved only for exceptional cases. By presenting a case report, the etiologic factors, the clinical signs, the diagnostic steps, the differential diagnostic considerations as well as the mode of therapy for this rare disease are described and discussed.

Abdomen, Acute↗
PubMed1984

[Comparison of x-ray plain films, x-ray tomograms and computed tomograms in lung nodules in children and adolescents].

A comparison was carried out of the value of plain radiographs, tomography and CT in 37 patients aged between five and 24 years. The majority of these patients had an osteosarcoma. Thirty-five CT examinations were performed on 16 patients and about 300 foci were demonstrated. Plain radiographs only showed 50%, and tomograms only 70% of these lesions. Surgery was carried out in 34 patients and there was agreement between the findings at thoracotomy and radiology in about half the cases. Frequently, more metastases were found at operation than could be demonstrated radiologically, in a few cases there were fewer.

Adolescent↗
PubMed1982

[Sonography for monitoring kidney transplants].

Ultrasonography is very useful for judging the position and course of renal transplants. With this method extra- and intrarenal complications can be detected very accurately. The sonographic examination is quite harmless and puts little strain on the patient. It can be carried out a few days after the operation. This initial sonogram, obtained as early as possible, makes it easier to recognize and to interpret later changes more promptly and correctly. The results of sonographic examinations in 18 patients with renal transplants are presented. They show that a normal sonogram reliably excludes extrarenal complications such as fluid collection or obstruction as well as rejection of the transplant. All cases of rejection correlated to clearly abnormal sonographic findings.

Adolescent↗
PubMed1982

[Pulmonary sequestration (author's transl)].

Pulmonary sequestration is a rare condition both in children and as in adults. A portion of the lung malformed during early embryological development receives an anomalous systemic arterial supply. The intralobar form is surrounded by normal lung within the visceral pleura and drains its blood into the pulmonary venous system. Extralobar sequestration has its own pleural investment and a systemic venous drainage. Intermediate forms are only partially embedded in normal lung with otherwise separate pleural embedded in normal lung with otherwise separate pleural investment, and classified as hybrid sequestrations. Clinical symptoms are secondary recurrent pulmonary infections especially with intralobar sequestration. The pathologic changes are regularly discovered already on plain roentgenograms of the chest. Extralobar sequestrations may be detected as incidental radiological findings. Angiography is of great diagnostic value to demonstrate the anomalous arteries. The usual treatment consists of excision of the sequestration, segmental resection, or lobectomy. For thoracotomy for a local and long lasting pulmonary process it is recommended to look for anomalous vessels in order to prevent their accidental cut with possible dangerous hemorrhage.

Adolescent↗
PubMed1982

[Sterile vesiko-ureteral reflux. Radiological kidney surface measurements as follow-up criteria].

33 patients with 46 sterile vesicoureteral refluxes were followed by repeated clinical-urological and radiological studies over a period from 1 to more than 6 years. The results of the evaluation, obtained by only looking at the urograms, were compared with the following measurements: the length of each kidney, the length ratio right to left, and the parenchymal area. At the end of the follow-up period, 2 out of 32 initially normal kidneys (about 6%) had pathologically low values, whereas 3 out of 14 already initially damaged kidneys (21,5%) showed a further decrease of these values. Preceding urinary tract infections with consecutive pyelonephritis, leading to a progressive shrinkage of the organ over many years, are thought and discussed to be more responsible for these results than the sterile reflux itself.

Adolescent↗
PubMed1981

Bilateral femoral dysgenesis with micrognathia, cleft palate, anomalies of the spine and pelvis, and foot deformities. Clinical and radiological findings.

Two girls afflicted with bilateral femoral hypoplasia, micrognathia, cleft palate, anomalies of the spine and pelvis, and foot deformities are reported. Based on 10 cases reported in the literature the following points are emphasized: 1. Femoral hypoplasia may be bilateral or unilateral. 2. Many patients show asymmetrical changes. 3. To our knowledge, the complete syndrome including a cleft palate has been reported only in females. 4. Femoral hypoplasia without a cleft palate may represent a different entity, of possibly autosomal dominant inheritance, or may occur in children of diabetic mothers.

Child, Preschool↗
PubMed1980

[Thoraco-omphalopagus: importance of angiocardiography for clarification of operability (author's transl)].

The article reports on a case of thorako-omphalopagus with conjoinment from the sternum to the umbilical region. Radiological and especially angiocardiographic examinations revealed considerable fusion and complex malformation of the hearts of Siamese twins. This specific diagnosis proved the inoperability of the otherwise largely regularly developed children who died on the sixth day of their life.

Angiocardiography↗