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Biomedical subjects

G Wilms

Publications and source records attributed to G Wilms.

At least 253 records · Page 14Linked to original sources
PubMed1978

The accuracy of tc-scan in the diagnosis of retroperitoneal metastases of malignant testicular tumours.

Based on the investigations carried out on 18 patients with testicular tumours, the results of CT-scanning are compared with the findings of conventional radiological examination and with lymphography in particular. At the actual state of technical evolution, the study reveals that CT-scanning does not possess sufficient spatial resolution to permit the diagnosis of very small lymph node metastases and all the more of a specific diagnosis of these metastases. Nevertheless, it remains a fact that CT-scanning obviously is a preferable method with respect to the visualisation of the exact extent and size of large involvements and the effects upon the surrounding tissues. CT-scanning is proposed as the screening-procedure with regard to patients suffering from testiscarcinoma, and allows, in a great number of cases, to make more invasive techniques superfluous.

Humans↗
PubMed1978

[Comparison of computer tomography with ultrasound in renal disease (author's transl)].

The following has been established in examinations under optimal conditions: 1. Ultrasound and CT scan appear to be of equal value in respect of validity and significance of information on the nature of findings, especially in connection with spaceoccupying processes, hydronephrosis and pyonephrosis. However, CT supplies a better anatomical and topographical overall view of the situation. 2. CT scanning, is definitely superior in respect of significance of information on the extension and behaviour in respect of neighbouring organs. This is particularly evident in the visualisation of relapses after hyponephromas and in perirenal processes. 3. Computer tomography is clearly superior in the identification of renal aplasias and hypoplasias.

Hematoma↗
PubMedDate not supplied

Percutaneous transluminal atherectomy: preliminary results.

Percutaneous transluminal atherectomy with the Simpson atherectomy catheter was performed in 10 patients with 14 severe atheromatous stenoses of the femoropopliteal arteries. Removal of plaque material with restoration of vessel patency was successful in all patients without complication. Further clinical follow-up will have to determine whether the recurrence rate of stenoses will be lower with this method than with conventional balloon angioplasty.

Adult↗
PubMedDate not supplied

Percutaneous transluminal renal angioplasty: initial results and long-term follow-up in 202 patients.

Percutaneous transluminal renal angioplasty was performed in 202 patients with 250 stenoses. The procedure was successful in 201 of 250 (83%). Results were better for postostial atherosclerotic lesions (94%), fibromuscular lesions (83%), and transplant kidneys (71%) than for ostial atherosclerotic lesions (29%). Of all the patients, 61% had reduced blood pressures following the procedure, with cure (diastolic blood pressure less than or equal to 90 mm Hg) in 31% of the patients. Cure rate with a mean follow-up of 25.8 +/- 19.4 months was 21% in bilateral atheromatous lesions, 30% in unilateral atheromatosis, 65% in unilateral fibromuscular disease, and 40% in bilateral fibromuscular dysplasia. Of the transplanted patients, 60% were cured. Complications occurred in 23 (11%) of the patients. Recurrence of stenoses occurred in 16 lesions (8%), 80% within the first year after the procedure.

Adolescent↗
PubMedDate not supplied

Glans ischemia after penis revascularization: therapeutic embolization.

A case of hypervascularization of the penis with glans ischemia after venous leakage procedure followed by revascularization of the penis is reported. The venous bypass between the inferior epigastric artery and the dorsal penile artery was misplaced on the deep dorsal vein leading to venous hypertension of the glans. Transcatheter embolization of the venous bypass cured this complication.

Adult↗
PubMedDate not supplied

Percutaneous hydrodynamic thrombectomy of acute thrombosis in transjugular intrahepatic portosystemic shunt (TIPS): a feasibility study in five patients.

PURPOSE: To evaluate the feasibility of percutaneous hydrodynamic thrombectomy in restoring patency of acutely thrombosed stent-shunts after transjugular intrahepatic portosystemic shunt (TIPS). METHODS: Percutaneous hydrodynamic thrombectomy was performed in five consecutive patients with angiographically documented complete thrombosis of the stent-shunt which developed within 2 weeks after the TIPS procedure. Thrombectomy was performed with a hydrolytic suction thrombectomy catheter, introduced via a transjugular approach. RESULTS: In all patients, immediate restoration of patency of the stent-shunt was achieved after deploying additional stent(s) to cover residual adherent mural thrombus. In two patients early reocclusion occurred. CONCLUSION: Percutaneous hydrolytic suction thrombectomy in acutely thrombosed intrahepatic portosystemic shunts is technically feasible.

Catheterization, Peripheral↗
PubMedDate not supplied

Repositioning and leaving in situ the central venous catheter during percutaneous treatment of associated superior vena cava syndrome: a report of eight cases.

PURPOSE: To describe a combined procedure of repositioning and leaving in situ a central venous catheter followed by immediate percutaneous treatment of associated superior vena cava syndrome (SVCS). METHODS: Eight patients are presented who have central venous catheter-associated SVCS (n = 6 Hickman catheters, n = 2 Port-a-cath) caused by central vein stenosis (n = 4) or concomitant thrombosis (n = 4). With the use of a vascular snare introduced via the transcubital or transjugular approach, the tip of the central venous catheter could be engaged, and repositioned after deployment of a stent in the innominate or superior vena cava. RESULTS: In all patients it was technically feasible to reposition the central venous catheter and treat the SVCS at the same time. In one patient flipping of the Hickman catheter in its original position provoked dislocation of the released Palmaz stent, which could be positioned in the right common iliac vein. CONCLUSION: Repositioning of a central venous catheter just before and after stent deployment in SVCS is technically feasible and a better alternative than preprocedural removal of the vascular access.

Catheterization, Central Venous↗
PubMedDate not supplied

Iatrogenic pseudoaneurysm in the upper arm: treatment by transcatheter embolization.

A 32-year-old woman presented with a pulsatile, painful mass in her left upper arm, originating several days after removal of an Ilizarov external fixation. The diagnosis of a pseudoaneurysm was made by medical history and by physical and ultrasonographic examination of the mass. Angiography confirmed the presence of the pseudoaneurysm, originating from a branch of the arteria profunda brachii, and definitive treatment was performed by transcatheter embolization. Clinical follow-up showed absence of pulsation and pain in the upper arm and a gradual volume decrease of the mass lesion.

Adult↗
PubMedDate not supplied

The angiographic incidence of renal artery stenosis in the arteriosclerotic population.

The incidence of renal artery stenosis was evaluated with intra-arterial digital subtraction angiography in 100 consecutive patients referred for peripheral arteriopathy. Fifty-seven patients were normotensive, 43 were hypertensive. In the normotensive group, renal artery stenosis was found in ten patients (17.5%). In the hypertensive group renal artery stenosis was found in twelve patients (28%). It is concluded that the incidence of renal artery stenosis is high in an arteriosclerotic population both in normotensive and hypertensive patients.

Angiography, Digital Subtraction↗
PubMedDate not supplied

Intravascular ultrasonography, a new alternative for the assessment of vascular lesions.

Intravascular ultrasonography (IVUS) was performed in ten patients undergoing a diagnostic or therapeutic angiography. The ultrasound probe was inserted in a 6 French catheter and introduced through a 7 or 8 French sheath. Exact information was yielded about the extent of arteriosclerosis, the stenotic process and the composition of the atheromatous plaque (soft plaque or presence of calcifications). In the patients undergoing a percutaneous transluminal angioplasty, the status after dilation was also assessed, and intimal tears and residual atheromatous plaques could well be evaluated.

Angioplasty, Balloon↗
PubMedDate not supplied

Ovarian vein embolization for the treatment of pelvic congestion syndrome: long-term technical and clinical results.

PURPOSE: Ovarian vein embolization has been used recently to treat pelvic congestion syndrome. The purpose of this study is to evaluate the clinical efficacy and safety of ovarian vein embolization in the treatment of symptomatic pelvic varices. MATERIALS AND METHODS: We performed ovarian vein embolization in 41 patients (mean age, 37.8 years; range, 30-58 years): 32 patients underwent unilateral embolization and nine patients underwent bilateral embolization. All had lower abdominal pain and pelvic varicosities were found on retrograde ovarian vein venography. Embolization was performed with a mixture of enbucrilate and lipiodized oil in all but one patient, in whom enbucrilate and minicoils were used. Initial technical success rate and clinical follow-up (1-61 months; mean, 19.9 months), conducted with use of mailed questionnaires, are reported. RESULTS: Initial technical success rate was 98%. Immediate complications were noted in two patients (4%) in the form of migration of some fragments of glue (used as embolic agent), which was treated conservatively. Clinical follow-up reveals variable symptomatic relief in 9.7% of cases and a total relief of symptoms in 58.5% of cases. Results in patients who had insufficient ovarian veins bilaterally were no better than those in patients for whom only the left ovarian vein was found insufficient. CONCLUSIONS: Transcatheter embolization of the ovarian veins is a safe and feasible technique leading to complete relief of symptoms in more than half of cases. No statistically significant difference in clinical outcome could be noted between patients presenting with bilateral insufficient ovarian veins, who underwent bilateral embolization, and patients presenting with an insufficient left ovarian vein, who underwent left unilateral embolization.

Abdominal Pain↗
PubMedDate not supplied

CT and ultrasound features of post-traumatic adrenal hemorrhage.

Computed tomographic and ultrasound features in four cases of post-traumatic unilateral adrenal hemorrhage are reported. The CT findings consist of enlargement of the gland with hyperdensity, streaky infiltration of the periadrenal fat, and enlargement of the adjacent crus. On ultrasound the suprarenal mass appears moderately echogenic. Long-term follow-up studies show decrease of the volume of the mass, with CT and ultrasonic patterns consistent with resolving hematomas.

Adrenal Gland Diseases↗
PubMedDate not supplied

Computed tomography in paraprosthetic sigmoid fistula.

A patient with a paraprosthetic-sigmoid fistula following complicated aortic abdominal surgery is reported. Computed tomography confirmed the diagnosis by demonstrating inflammatory tissue around the left limb of the prosthesis in close contact with the sigmoid.

Aged↗
PubMedDate not supplied

Computed tomography of the stomach with water as an oral contrast agent: technique and preliminary results.

Computed tomography of the gastric wall after ingestion of 500-700 ml of pure tap water, followed by rapid intravenous injection of contrast medium, was performed on 24 patients with known gastric tumors. Computed tomography detected the wall abnormality in 22 of 24 cases (91%). Local gastric involvement was correctly predicted in 20 of these patients. Tumoral ulceration was only diagnosed in two of 13 proven ulcerated tumors. General acceptance and tolerance of tap water as a gastric contrast medium was good in all patients. No side effects occurred.

Contrast Media↗
PubMedDate not supplied

Thickening of dura surrounding meningiomas: MR features.

Thickening of the dura in continuity with a convexity meningioma was noted on T1-weighted magnetic resonance (MR) images in seven patients. In five cases the corresponding CT image of the lesions was typical of meningioma. In two other cases the CT image of the lesions was atypical, owing to cyst formation in one and extensive edema in the other. After intravenous injection of paramagnetic contrast medium in four patients, the thickened dura demonstrated contrast enhancement at a variable distance from the tumor. In three patients the thickened dura was confirmed surgically. Pathology, available in one case, showed the thickened dura to correspond to tumoral extension within or around the dura. Magnetic resonance demonstration of thickening of the dura in continuity with a mass at the cerebral convexity may prove to be of importance in the differentiation of atypical lesions on CT and MR, especially with lower field magnets. Moreover, it could provide useful information to the neurosurgeon for more complete resection of the tumor.

Aged↗
PubMedDate not supplied

Resorption of the lateral maxillary incisor: assessment by CT.

Computed tomography of the maxillary alveolar arch was performed in three children with delayed eruption of one or both maxillary cuspids. Computed tomography demonstrated close contact between the ectopically localized and nonerupted canine and the lateral incisor. The lesion was unilateral in two patients and bilateral in one. In two patients resorption of the lateral incisor root was demonstrated. Moreover, CT permitted exact determination of the extent of the lesion by differentiating between superficial cementodentine resorption limited to the cementodentine (superficial resorption) and resorption extending into the pulpal canal (pulpal canal involvement).

Adolescent↗