Search PubMed⌕ Search

Biomedical subjects

O Nativ

Publications and source records attributed to O Nativ.

At least 55 records · Page 3Linked to original sources
PubMed1998

Minimally invasive pervaginam procedures for the treatment of female stress incontinence using a new pubic bone anchoring system.

The purpose of this ongoing study is to evaluate the safety and efficacy of new minimally invasive pervaginam cystourethropexy and sling procedures for the treatment of female genuine stress urinary incontinence. A total of 75 women (mean age, 52.8 years) underwent either a cystourethropexy or a sling procedure. A miniature bone anchor and a staple-like bone anchor driver were used for the fixation of periurethral tissue or a xenogenic sling to the pubic bone. With a mean follow-up of eight months, 61 patients (82%) were completely cured of stress incontinence, 10 (14%) reported a more than 50% decrease in pad usage, and 4 patients showed failure early following surgery. The exclusively pervaginam cystourethropexy and sling procedures are minimally invasive, safe, and effective. Further experience and longer follow-up are necessary to establish their role in the treatment of women with stress urinary incontinence.

Adult↗
PubMed1998

Value of nuclear morphometry for differentiating localized from metastatic renal cell carcinoma.

OBJECTIVE: To evaluate the feasibility of using nuclear morphometry of primary renal cell carcinoma to differentiate cases with localized tumors from those with metastases. METHODS: Using an interactive image analysis system, nuclear morphometry was performed on hematoxylin- and eosin-stained slides of 40 primary renal tumors. There were 18 cases with organ-confined disease and 22 with advanced stage. RESULTS: The most significant shape descriptor to differentiate between the two groups was mean nuclear regularity factor (889.5 +/- 24.4 vs. 701.1 +/- 157.3, p = 0.00015). The combination of mean nuclear area and mean nuclear regularity factor enabled accurate prediction of metastatic potential in 36 (85%) cases. CONCLUSION: Nuclear morphometry measured by image analysis provides prognostic information on patients with renal cell carcinoma.

Adult↗
PubMed1998

Is there a role for low doses of mitotane (o,p'-DDD) as adjuvant therapy in adrenocortical carcinoma?

Four patients suffering from adrenocortical carcinoma were treated with low doses (1.5-2.0 g) of mitotane (o,p'-DDD) for the complete follow-up time following surgery (21-68 months). Treatment with mitotane was started shortly after surgical removal of the tumor (three patients) or the tumor and multiple lung metastasis (one patient). No significant side effects or complications from the medication were noted. Two patients remain disease free after 57 and 21 months on treatment. A third patient died of an unrelated reason (varicose vein bleeding) after 68 months on mitotane without evidence of tumor recurrence or metastasis. In the fourth patient, two lung metastasis were successfully removed after 48 months of follow-up. The patient is doing well and is disease free 6 months later. Though our series is too small to draw final conclusions, we suggest that low doses of mitotane, which are well tolerated, might offer prolonged disease-free survival in adrenocortical carcinoma. To be beneficial treatment has to be started early after surgical removal of the tumor and metastasis, and be continued for long periods of time.

Adrenal Cortex Neoplasms↗
PubMed1997

Anti-neoplastic activity of paclitaxel on experimental superficial bladder cancer: in vivo and in vitro studies.

The effects of intravesical administration of paclitaxel (taxol) in a bladder tumor model in mice, as well as the drug's in vitro activity on the same tumor cells, have been studied. Two cell lines, derived from MBT-2 cells, were employed in these experiments. The T50 line (obtained by many passages in mice) was much more aggressive in vivo than the T5 line. In vivo paclitaxel treatment for 3 days after T5 implantation resulted in a considerable retardation of tumor growth, whereas under the same conditions the T50 line was much less, although still significantly, affected. When treatment was started 1 day after tumor implantation, both tumor variants were affected by paclitaxel to the same extent. The in vitro experiments utilized the MiCK assay, which allows continuous recording of the kinetics of cell growth. These studies revealed a 39.8% inhibition of cell growth by 2.10(-8)M paclitaxel in the T50 line and a 30-fold increase in concentration had only a small additional effect on the degree of inhibition. At 2.10(-8)M paclitaxel, growth of T5 was inhibited by 21.7%, which increased to 35.2% at 6.10(-7)M. The treated cells displayed bundles of microtubuli, as described for other paclitaxel-treated cells.

Administration, Intravesical↗
PubMed1997

Incisionless per vaginal bone anchor cystourethropexy for the treatment of female stress incontinence: experience with the first 50 patients.

PURPOSE: We evaluated the safety and efficacy of a new minimally invasive surgical procedure for the treatment of women with genuine stress urinary incontinence. MATERIALS AND METHODS: A total of 50 women (mean age 51 years) was treated for type I or II stress urinary incontinence. A miniature bone anchor and a staple like bone anchor driver were used for fixation of periurethral tissue to the public bone. RESULTS: The procedure was successfully performed in all patients without intraoperative bleeding. No significant persistent postoperative pain was noted and only 1 patient had urinary tract infection. Concomitant vaginal hysterectomy, cystocele repair or perineoplasty was performed in 33 cases. At 12-month followup 41 patients (82%) are completely continent, 7 patients (14%) reported more than 50% decrease in pad usage and 2 cases are considered surgical failures. Mean operative time was 28 minutes. CONCLUSIONS: Data suggest that our new minimally invasive procedure provides a safe, effective and easy to learn alternative for treatment of women with anatomical stress incontinence.

Adult↗
PubMed1997

Comparison of nuclear DNA content in locally invasive and noninvasive papillary carcinoma of the thyroid gland.

Extrathyroidal invasion of papillary carcinoma of the thyroid gland has a very bad prognosis. A retrospective study was performed on 40 specimens from patients with papillary carcinoma of the thyroid gland to find out whether DNA ploidy correlated with aggressive tumor behavior. The nuclear DNA content of 20 locally aggressive papillary thyroid carcinomas was studied by flow cytometry. The results were compared with those of a matched control group of 20 patients with noninvasive papillary tumors. Forty percent of the tumors with spread to extrathyroid tissue were aneuploid, whereas all the tumors without such extension were diploid. This difference was statistically significant (p < 0.003). The data suggest that the differentiation of locally noninvasive and invasive papillary thyroid carcinomas may be potentially possible by nuclear DNA determination.

Aneuploidy↗
PubMed1997

The role of vimentin expression in predicting the long-term outcome of patients with localized renal cell carcinoma.

OBJECTIVE: To evaluate the prognostic significance of vimentin intermediary filament expression by tumour cells in patients with renal cell carcinoma (RCC) localized to the kidney. PATIENTS AND METHODS: Thirty-nine patients with localized RCC (pT1,pT2) were assessed in a retrospective study. Tumour cells were evaluated immunohistochemically for vimentin, epithelial membrane antigen (EMA) and polyclonal cytokeratin expression. The prognosis of cases expressing positive vimentin expression in tumour cells was compared with that of cases with no expression. Additional clinical information and conventional histological grade of the tumours were also included in the survival analysis. RESULTS: Univariate analysis of patient survival and tumour recurrence showed a statistically significant association between vimentin-positive tumours and poor patient outcome; the EMA stain showed borderline significance and histological grade was significantly associated with prognosis. The combination of tumour vimentin expression and histological grade provided a better predictor of prognosis and proved to be the best independent prognosticator of survival by multivariate analysis. CONCLUSIONS: Vimentin expression by tumour cells provides important prognostic information for patients with localized RCC; the combination of vimentin expression and histological grade is a better predictor for survival than grade or vimentin expression alone.

Carcinoma, Renal Cell↗
PubMed1997

The impact of tumor size on clinical outcome in patients with localized renal cell carcinoma treated by radical nephrectomy.

PURPOSE: We investigated the influence of tumor size on clinical outcome in patients with localized renal cell carcinoma treated with radical nephrectomy. MATERIALS AND METHODS: We reviewed retrospectively the records of 54 patients with pathological T1, T2 renal cell carcinoma for age, sex, histological grade, cell type, architecture, deoxyribonucleic acid ploidy pattern, nuclear morphometry and vimentin expression. Variables found to predict outcome were correlated with tumor size, which was further tested for its prognostic value. RESULTS: The best predictors of prognosis were grade, ploidy pattern, nuclear morphometry and vimentin expression. Small (less than 5 cm.) and large (larger than 5 cm.) tumors had similar distribution of prognostic variable subgroups. No differences in progression rate or survival were noted between the tumor size categories. CONCLUSIONS: These results suggest that small renal tumors may follow unfavorable courses and require aggressive treatment.

Adolescent↗
PubMed1997

Failure analysis in irradiated stage I testicular seminoma. Results of long-term follow-up (1968-1993).

A retrospective analysis of 81 stage I seminoma patients irradiated at the Northern Israel Oncology Center between 1968 and 1993 was undertaken. During this period, 5 (6%) patients relapsed, all outside the initial treatment volume, with a median time of 6.6 (range 1-12) months to relapse. Three patients were salvaged with cisplatin-based chemotherapy. The policy of adjuvant radiotherapy resulted in a high probability of cure and decreased relapse rate. Early relapse is a rare event in properly irradiated stage I seminoma which is highly curable with a cisplatin-containing regimen. Recurrences tend to occur outside the treated radiation volume.

Antineoplastic Agents↗
PubMed1997

Oral fluconazole for Candida urinary tract infection.

Fungal urinary tract infections are increasingly prevalent in hospitalized patients. This trial compares the efficacy of oral fluconazole along with catheter replacement to that of catheter replacement alone for treatment of funguria. The study group patients (n = 30) were given 100 mg of fluconazole followed by 50 mg/day for 14 days and had their catheters replaced on day one. The control group, randomized on a 1:1 basis (n = 30) had only a catheter replacement. Seventeen and 21 patients in the study and control groups, respectively, had Candida albicans, 8 and 5 had Candida tropicalis, and 5 and 4 had Candida glabrata. The MICs of the organisms were determined by the E test. The MIC90 of the C. albicans, C. tropicalis, and C. glabrata were 12, 16, and 64 micrograms/ml, respectively. Funguria disappeared in all study group patients within a week but recurred in only 1 patient 8 weeks after enrollment in the study. Although fluconazole caused a more rapid and an almost complete eradication of funguria and urinary WBCs, catheter replacement alone was followed by an 87-93% clearance of urinary findings at 8 weeks of follow-up. These results suggest that in patients with funguria low-dose fluconazole induces a more rapid clearance of urinary findings than does catheter replacement alone.

Administration, Oral↗
PubMed1997

Primary testicular seminoma: prognostic significance of nuclear DNA ploidy pattern.

OBJECTIVE: To evaluate the impact of nuclear DNA content on outcome of patients with testicular seminoma. METHODS: Formalin-fixed paraffin-embedded blocks taken from 111 patients with primary testicular seminoma were studied by flow cytometry for nuclear DNA content. The results of ploidy status were correlated with histopathologic features, tumor progression and patients' survival. RESULTS: 48% of the tumors were DNA diploid and 52% were DNA aneuploid. None of the patients with DNA diploid seminoma had an advanced stage seminoma at the time of diagnosis. Progression after therapy or cancer-related death occurred only in patients who had DNA aneuploid testicular tumors. CONCLUSIONS: Nuclear DNA ploidy pattern provides important prognostic information for patients with testicular seminoma.

Adult↗
PubMed1997

Relationship between DNA ploidy and functional estrogen receptors in operable prostate cancer.

OBJECTIVE: To evaluate the relationship between the nuclear DNA content and the tissue estrogen receptor (ER) level in patients with operable adenocarcinoma of the prostate. METHOD: Surgical specimens taken from 73 patients with clinically localized prostate cancer were studied. Tumor DNA ploidy pattern as measured by flow cytometry was correlated with the level of functional ER using the nuclear biopsy assay. RESULTS: Forty-five percent of the tumors were DNA diploid, and 55% had an abnormal ploidy pattern (DNA tetraploid or DNA aneuploid). The ER level ranged from 0 to 6,475 fmol/mg DNA (mean 839 fmol/mg DNA). Twenty-two percent had no functional receptors. Marked association was noted between ER and nuclear DNA content. Seventy-five percent of the tumors with no ER had abnormal ploidy patterns. The mean receptor level for DNA diploid prostate cancer was 1,034 fmol/mg DNA versus 661 fmol/mg DNA for DNA nondiploid tumors (p < 0.008). An inverse correlation was found between ER values and histologic grade or pathologic stage. High-grade and high-stage tumors had lower levels of ER compared to low-grade and early-stage carcinomas. CONCLUSION: Our results demonstrate an association between ER values and variables that predict prognosis in prostate cancer. It is possible that this parameter may be helpful in identification of prognostic groups in patients with prostate cancer.

Adenocarcinoma↗
PubMed1997

Transurethral hyperthermia for relieving obstructive voiding symptoms in patients with hormone refractory prostate cancer.

Transurethral thermal treatment has been used to relieve obstructive voiding symptoms in 10 patients with prostate cancer. All patients failed previous endocrine treatment for the relief of obstructing urinary symptoms. Temperature ranging from 46 degrees C to 47 degrees C was applied transurethrally using Thermex II thermal system. Treatment was given in a single session for a duration of 180 minutes on an outpatient basis without sedation. Mean duration of follow-up was 8.5 months (range 4-13 months). Maximal urine flow rate, post-voiding residual volumes and changes in subjective symptoms were used to assess treatment response. Removal of an indwelling catheter was possible in all 3 patients with chronic retention. Urinary infection (2 patients) and temporary retention (3 patients) were the only complications recorded. The preliminary results suggest that transurethral hyperthermia is a well-tolerated, safe and effective procedure for obstructive voiding symptoms in patients with hormone refractory prostate cancer. Longer follow-up and a larger group of patients is required to assess this alternative modality.

Adenocarcinoma↗