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Biomedical subjects

G Hubmer

Publications and source records attributed to G Hubmer.

At least 19 recordsLinked to original sources
PubMed2003

Long-term results of nephron-sparing surgery for renal cell carcinoma in 114 patients: risk factors for progressive disease.

OBJECTIVES: To evaluate risk factors for metastatic disease after nephron-sparing surgery (NSS) for renal cell carcinoma (RCC). PATIENTS AND METHODS: NSS for RCC was used 117 times in 114 patients at our institution; 61 had a normal contralateral kidney and were selected for elective NSS, and in 56 cases (53 patients) the indication for NSS was imperative. Univariate and multiple regression analysis was used to evaluate the risk factors for metastatic disease. RESULTS: After a mean follow-up of 80 months, there was tumour progression in 17 of the 114 patients (15%). In the univariate analysis, the tumour diameter (P = 0.03) and imperative indication (P = 0.009), and in multiple regression analysis only imperative indication, were significant risk factors for metastatic disease (P = 0.016). CONCLUSIONS: Elective NSS for RCC provides excellent long-term results in selected patients, whereas those undergoing NSS imperatively are at a significantly higher risk of metastatic disease and require a close follow-up.

Adult↗
PubMed2003

Angiomyolipoma with a caval thrombus.

We report the case of a female patient presenting with flank pain. Abdominal ultrasound revealed a tumor of 8 cm in diameter. After abdominal computerized tomography, the tumor was classified as angiomyolipoma with a tumor thrombus in the inferior vena cava. After nephrectomy, the diagnosis was confirmed histologically. To our knowledge, this is the 11th case of a renal angiomyolipoma extending into the vena cava.

Angiomyolipoma↗
PubMed2001

Handicap of walking by a huge paratesticular liposarcoma.

We describe the case of a 71-year-old male with a huge left-sided paratesticular tumour, whose walking was increasingly handicapped by this vast mass. Two palliative excisions of tumour tissue were performed. Histology revealed a poorly differentiated paratesticular liposarcoma. The patient achieved satisfying mobility for several months before he died of cachexia.

Aged↗
PubMed2000

[Central nervous system control of micturition in patients with bladder dysfunctions in comparison with healthy control probands. An electrophysiological study].

PURPOSE: The pontine micturition center plays a central role in regulating the micturition reflex, but the precise neural mechanisms are unclear. The cerebral cortex is involved in coordinating micturition but there is little knowledge on specific evolutionary higher brain regions. The present study aimed to investigate whether cortical activation during micturition can be demonstrated by EEG power spectra patterns and to explore whether specific cortical regions involved in the interaction of inhibition and release during the micturition reflex can be discerned. We also aimed to test whether intravesical electrostimulation (IVES) therapy in patients with micturition disorders has an effect on patterns of cortical activity. METHODS: The healthy control group was divided into those who were able to void when requested (6 women, 12 men) and those who were not (8 women, 10 men). These subgroups were compared separately with the 14 patients before and after IVES for voiding dysfunction. Following IVES all patients were able to void spontaneously. Mean age of the patients and healthy volunteers was 52 and 30 years, respectively. At the beginning of the study all subjects had a bladder volume of approximately 250 mL as measured by sonography. The EEG was obtained at rest and during the attempt to void. In the patients' group EEG was obtained before IVES treatment and at the day of the last stimulation. The measurement period lasted about 6 minutes. At the beginning of the recording the proband was asked to close his/her eyes. During the resting period after 1 minute the patient was asked to open his/her eyes. After 10 seconds he/she was asked to close his/her eyes again. Then, with eyes still closed, the patient was asked to void. During the entire EEG recording the patient was seated in a comfortable, electrically isolated chair in a darkened room and separated from the examiner by a partition. The subject was asked to relax and not move his/her eyes. The EEG was recorded from the 19 standard points (10-20 System) versus an averaged mastoid electrode with a gold-plated cup electrode (Glass). An EOG was recorded simultaneously to register eye artefacts. The amplification chain was calibrated with a 10-Hz 100-microVss sinus signal generated with a biosignal amplifier. The transitional resistances of all EEG channels were less than 5 kOhm and established as soon as possible. EEG and EOG signals were amplified and recorded with a B.E.S.T. Brain Mapping System. The recording frequency was 256 Hz and the resolution of the analog digital conversion was 12 bit. A high pass and a low pass filter were set to 0.53 Hz and 70 Hz, respectively. All recordings were inspected visually before computer analysis. Artefacts were marked and excluded from the further analysis. None of the EEG recordings showed clinical abnormalities. As expected, the EEGs during voiding attempts showed some muscle potentials and slow motion artefacts. For each subject two artefact-free resting segments of about 20 seconds, one from the resting phase and one from the voiding attempt, were defined by hand for automated analysis. Relative power spectra (microV2) were calculated for the defined segments. From the spectra the relative alpha band power (7.5-13.0 Hz) was calculated for each subject for rest and voiding. Group (patients vs. voiding probands vs. probands unable to void) and sex were independent variables. The alpha power of the 17 electrode positions of the 10-20 system (without Fp1 and Fp2) during rest and attempted voiding were repeated measurement variables. The frontopolar electrode was not used because of its susceptibility to artefacts. The number of dependent variables was due to the explorative nature of the study. With interactions of variables with more than two factor levels a Greenhouse-Geisser correction was performed. Interactions were subjected to contrast analysis and Newman-Keuls-Post tests. RESULTS: Significant effects were seen for BEDINGUNG (

Cerebral Cortex↗
PubMed1999

Hormonal therapy of prostate cancer: is there any news?

Androgen ablative therapy was introduced in the early 1940s and, even today, has remained the golden standard for the treatment of advanced prostate cancer. During the past decades, a variety of improvements have been achieved which, however, primarily aimed at a better tolerance or improved acceptance of androgen deprivation. However, after almost six decades of hormonal therapy it is appropriate to ask whether progress was also made in terms of efficacy, particularly as far as prolongation of survival or quality of life is concerned. During the last few years, two therapeutic strategies, maximal androgen blockade and intermittent androgen suppression, have been considered true conceptual advances. However, despite tremendous efforts and a huge number of studies so far, these concepts appear to produce more questions rather than answers. Therefore, it seems appropriate to raise some critical issues of maximal androgen blockade and intermittent androgen suppression.

Androgen Antagonists↗
PubMed1999

Value of transrectal ultrasound in preoperative staging of prostate cancer.

BACKGROUND: The aim of the study was to compare preoperative transrectal ultrasound findings with final histopathological stage after radical prostatectomy to determine the value of TRUS in preoperative staging of prostate cancer. METHODS: The evaluation was performed as a retrospective study. In 114 radical prostatectomy specimens the histopathological, ultrasound and rectal digital findings were correlated. Mean age of patients was 63 years and in all patients a radical retropubic prostatectomy was performed. RESULTS: Organ confined PC was found correctly with TRUS in 68% and capsular penetration in 32%. Corresponding findings with digital rectal examination (DRE) were 68% and 17% respectively. Sensitivity of TRUS in organ confined PC (T1-2) was 66.1% (DRE 68.5%), specificity 32.6% (DRE 20%) and positive predictive value 55.7% (DRE 49.3%). Sensitivity, specificity and positive predictive value of TRUS for stage T3 (a,b,c) were 32.6%, 68.4% and 45.5% respectively. A separate evaluation of stage T3c revealed for TRUS: sensitivity 41.2%, specificity 81.8% and positive predictive value 36.8%. CONCLUSION: On the basis of this retrospective analysis, and due to the low sensitivity and specificity, TRUS is not suitable for adequate preoperative staging of prostatic cancer.

Adult↗
PubMed1997

The use of polydimethylsiloxane in the treatment of incontinence after radical prostatectomy.

OBJECTIVE: To report the results of transurethral submucosal injection therapy of polydimethylsiloxane (PDS) to treat incontinence after radical prostatectomy (RP). PATIENTS AND METHODS: Since 1993, about 80 retropubic RPs have been carried out at our institution each year. Severe post-operative incontinence occurred in six patients, with a mean duration of incontinence after RP of 28 months. The pre-operative evaluation consisted of cysto-urethroscopy and urodynamics. Because we have no experience with artificial sphincter implantation, transurethral injection therapy was used to treat the post-operative incontinence, using PDS (vulcanized silicone rubber particles). This material has a mean particle size of 188 microns, providing stability of the material at the injection site. The six patients with severe post-operative incontinence were treated using injection therapy with PDS. RESULTS: After a mean follow up of 15.5 months, five patients, who suffered from day and night incontinence and required at least five pads per day, were dry after injection therapy. One patient improved significantly but still required two pads during the day, but was continent during the night; three patients required a second injection. A mean of 7.5 mL of PDS was used per patient and the side-effects of therapy (dysuria and urinary retention) were minimal. CONCLUSION: Because PDS has excellent biocompatibility, few side-effects or complications, transurethral injection therapy using silicone particles is a justifiable procedure for treating incontinence after RP.

Dimethylpolysiloxanes↗
PubMed1997

Randomized comparison of total androgen blockade alone versus combined with weekly epirubicin in advanced prostate cancer.

Hormone deprivation is the gold standard for the treatment of metastatic prostate cancer. However, prostate cancer being primarily a heterogeneous tumor comprising hormone-dependent, hormone-sensitive, and hormone-insensitive cells, at least the latter remain unaffected by hormonal manipulations, thus making disease progression almost inevitable. In quest of a more comprehensive therapy we therefore studied the concept of early combined chemoendocrine therapy in a prospective randomized multicenter trial. The purpose of this study was to evaluate whether patients with previously untreated advanced prostate cancer benefit from combining total androgen blockade (TAB) with weekly epirubicin chemotherapy (E-TAB). From April 1988 to January 1991, 145 previously untreated patients with either metastatic (n = 117) or locally advanced (n = 28) histologically confirmed prostate cancer were randomly allocated to treatment with TAB by bilateral orchiectomy and flutamide 250 mg t.i.d. or TAB plus weekly epirubicin 25 mg/m2 i.v. for 18 weeks (E-TAB). The study endpoints were progression-free survival and overall survival. In addition the effects of treatment on quality of life were assessed by two methods. At regular intervals patients self-assessed ten qualities of physical, functional and emotional health using 5-point scales. In order to evaluate the time without disease progression and treatment-induced adverse effects, a modified Q-TWiST (quality-adjusted time without symptoms and toxicity) model was applied. At a median follow-up of 81 months, progression-free survival and overall survival in the TAB and E-TAB groups were 12 and 18 months (p < 0.02) and 22 and 30 months (p = 0.12), respectively. In patients with > 5 sites of bone metastasis (D2max), the corresponding periods were 9 and 14 months (p = 0.005) and 17 and 27 months (p = 0.06), respectively. Subjective quality of life assessment showed no impairment of quality of life by epirubicin treatment. Stage D and D2max patients treated with E-TAB had an average gain in Q-TWiST of 5 months (p = 0.098) and 8 months (p = 0.03), respectively, compared to the TAB treatment. Objective toxicities were generally mild with either treatment. In conclusion, the combination of TAB and epirubicin was well tolerated by patients with advanced prostate cancer and resulted in a significant extension of progression-free survival. This effect of E-TAB on objective treatment outcome was accompanied by prolonged time without treatment-induced adverse effects and tumor progression, i.e., time with good quality of life. Therefore, further studies with E-TAB appear warranted in patients with advanced prostate cancer.

Aged↗
PubMed1996

Effect of extracorporeal shock wave lithotripsy on prostate specific antigen.

PURPOSE: We evaluated the effects of extracorporeal shock wave lithotripsy (ESWL) of distal ureteral calculi on serum prostate specific antigen (PSA). MATERIALS AND METHODS: A total of 29 consecutive men with distal ureteral calculi at a maximum of 25 mm. from the ureteral orifice, and without any history of urinary tract infection, benign prostatio hyperplasia or prostate cancer underwent ESWL with the Dornier MPL 9000 X lithotriptor. The therapeutic focus size was 48 X 7 mm. PSA was measured exactly 5 minutes before ESWL, as well as 120 minutes, 24 hours and 7 days after termination of treatment. RESULTS: Fragmentation rate was 100% and all patients were stone-free within 1 week of therapy. There was no statistically significant difference between PSA values before and after treatment. Only 15 patients had a slight increase in PSA at 120 minutes after treatment (range 0.01 to 0.41 ng./ml., mean 0.07). CONCLUSIONS: ESWL can be performed in men at risk for prostate cancer without impairing the predictive value of PSA.

Adult↗
PubMed1995

[Prenatal diagnosis of abnormalities of the urinary tract].

During the period January 1983 to December 1993 malformations of the urinary tract were suspected in 166 cases prenatally and confirmed after birth. Boys dominated (72% of cases); in 66% of the cases the malformation was unilateral. The most frequent diagnosis was ureteropelvic obstruction in 74 infants (45%). 73 out of 166 infants (44%) required surgical intervention. Altogether 124 operations were performed (68% temporary diversions; 32% definitive corrections). The high number of required interventions already during the first month of life highlights the importance of prenatal screening for the early detection of urinary tract malformations, especially obstructive uropathy and multicystic-dysplastic kidney. On the other hand, vesicouretal reflux is usually detected only postnatally on investigation of a urinary tract infection.

Diagnostic Imaging↗
PubMed1994

Laparoscopic procedure for varicocelectomy.

OBJECTIVE: To report the results of laparoscopic varicocelectomy, a new surgical technique which presents minimal risks and provides an effective management of clinical varicoceles. PATIENTS AND METHODS: Between July 1991 and November 1992, 45 laparoscopic varicocelectomies were performed in 44 patients whose ages ranged from 11 to 41 years. Endoscopic ligation, carried out according to the technique described by Palomo, was performed in 14 patients. In the remaining 30 patients ligation of 31 spermatic veins was performed according to Bernardi's procedure. RESULTS: On post-operative follow-up symptoms disappeared in all the patients treated. Two of the patients showed persistent venous reflux on colour Doppler ultrasound examination. CONCLUSIONS: The excellent identification of the anatomical structures, the minimal surgical trauma, the decrease in post-operative morbidity and the quick convalescence of the patients have made this new technique a viable alternative to routine open high ligation.

Adolescent↗
PubMed1994

[Laparoscopic ligation of spermatic vessels in varicocele].

Open surgical procedures and percutaneous transvenous radiological techniques are available for the treatment of varicoceles. With the advent of laparoscopic surgery another minimally invasive procedure has become available. In 39 patients with left unilateral and 1 with bilateral, clinically evident, varicocele laparoscopic ligation of the spermatic vessels was performed. In 17 cases both the spermatic veins and the artery were cut, whereas in 24 cases it was possible to spare the spermatic artery. In more than 90% of these cases the artery could be identified as a pulsatile vessel. No serious complications were encountered. All patients were discharged from the hospital on postoperative day 1 or 2. Out of 26 patients who could be followed clinically and by colour coded Duplex sonography, 1 showed signs of persistent and 1 of recurrent varicocele. The quick convalescence of the mostly young patients, the excellent identification of the anatomic structures, and the minimal surgical trauma are advantages of laparoscopic varicocelectomy.

Adolescent↗
PubMed1992

In situ extracorporeal shock wave lithotripsy of ureteral calculi with the MPL-9000X lithotriptor.

Within the wide armamentarium of urinary stone treatment modalities extracorporeal shock wave lithotripsy (ESWL) has been established as the first line procedure. With the Dornier MPL-9000X lithotriptor one has the choice of ultrasound or fluoroscopic localization of calculi throughout the entire urinary tract. Except for the kidney, ultrasound guidance is preferred for calculi in the distal ureter, while fluoroscopy is generally used on the proximal two-thirds of the ureter. Between January and December 1990, 123 ESWL treatments were performed on 83 patients suffering from ureteral calculi with an average stone size of 9.3 x 6 mm. Median treatment parameters were 1,597 shock waves at 19.3 kv. for 43 minutes. For stones in the upper two-thirds of the ureter sedation analgesia was given, while ESWL on the pelvic ureter did not create intolerable pain. Of the treatments 69% were done on an outpatient basis. In situ ESWL treatment of urinary calculi was successful in 72 patients (86.7%), and 20 patients (24.1%) were treated with multiple treatment sessions. ESWL therapy for 47 stones in the distal ureter showed better results than for 33 stones plus 2 steinstrasse in the proximal part (95.5% versus 80% stone-free rate). Of 4 patients with mid ureteral calculi 2 could be rendered stone-free by ESWL alone. Auxiliary procedures, such as percutaneous nephrostomy or ureteral splints, had to be performed in 15.7%. Final endoscopic stone extraction was done in 7 cases and open surgery in 4, constituting a 13.3% failure rate for ESWL therapy. The results prove that the MPL-9000X lithotriptor is effective for primary noninvasive stone treatment.

Combined Modality Therapy↗
PubMed1990

[Renal cell carcinoma with venous invasion: therapy--prognosis].

Between 1966 and 1988 a total of 406 patients with renal cell carcinoma (RCC) was treated at our department. Among these 51 patients were found to have gross renal vein involvement, in 21 cases with extension into V. cava. In one case the tumor-thrombus has been reaching the level of the hepatic veins, in two cases the right atrium. MR and sonography, especially echocardiography, seems to be the best choice of diagnostics. Because of the advanced stage of disease only 21 patients were selected for operative treatment, in two cases under extracorporal circulation. Prognosis seems to be very poor, 11 patients (more than 50%) died within 2 years after diagnosis. But still the high risk and the great expense of tumor nephrectomy and thrombectomy in such cases, even with substitution of extracorporal circulation, seems to be justified by the actuarial 5-year survival rate of 20%.

Carcinoma, Renal Cell↗
PubMed1988

Organ-preserving surgery for renal cell carcinoma in patients with a solitary kidney or bilateral tumors.

Organ-preserving surgery is generally accepted when renal cell carcinoma (RCC) occurs in a solitary kidney or in both kidneys. Over a 12-year period, 238 patients underwent surgery for RCC at our hospital; 15 (6.3%) of these underwent organ-preserving procedures. Nine of ten patients with disease in a solitary kidney are alive without evidence of tumor (four more than 5 years postoperatively and five from 2 to 4 years). Six patients had bilateral disease, three of whom are alive at 2, 2, and 3 years, and three of whom died at 4, 5, and 9 years.

Carcinoma, Renal Cell↗