Biomedical subjects
Publications and source records attributed to J M Marechal.
Giant renal cysts measuring more than 15 cm in greatest diameter are uncommon and the association with erythrocytosis and hypertension is very rare. We present a case of a 22-year-old man with an incidental giant left renal cyst associated with hypertension and polycythemia that was treated by drainage and laparoscopic excision, followed by resolution of both hypertension and erythrocytosis.
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Explore the source record for details and available documents.
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PURPOSE: The pS2 trefoil protein has been detected in close association with neuro-endocrine differentiation in prostate cancer and prostatic intraepithelial neoplasia. These preliminary results have suggested that pS2 is a candidate as a specific marker for prostate cancer tissue. To ascertain the specificity of pS2 in prostate cancer tissue, we have used an RT-PCR method from prostate biopsies provided from human malignant and benign prostatic hyperplasia (BPH) tissue. MATERIALS AND METHODS: Prostate biopsies were obtained from transrectal biopsies from 153 patients with an abnormal DRE or a PSA more than 4 ng./ml. or symptoms of BPH and a PSA more than 4 ng./ml. Total RNA was extracted from fresh frozen specimens of tissue samples. Detection of pS2 transcript compared with GADPH transcripts was done using RT-PCR. RESULTS: Biopsy results showed that 108 patients had prostate cancer (average Gleason score 6.39+/-0.74) and 45 patients had BPH. PS2 RT-PCR results showed that PS2 RNA expression was negative in 83% of the BPH cases. Conversely, 92% of prostate cancer specimens were positive (Chi-square: 86.09, p<0.001). There was no correlation with tumor stage or the Gleason score. Comparing the expression of pS2 in BPH and localized prostate cancer, we found a sensitivity of 92% and a specificity of 82%. CONCLUSIONS: On this large sample of prostate biopsies from patients at risk of having prostate cancer, pS2 was demonstrated as an interesting marker significantly associated with prostate cancer. Further work on the expression of pS2 according to differentiation and hormonal status is in progress.
OBJECTIVE: The authors present demographic and surgical data from a randomized phase III trial, instituted by the EORTC Genitourinary Group in 1988, the aim of which was to assess whether complete lymph node dissection in conjunction with radical nephrectomy for renal cell cancer is more effective than radical nephrectomy alone. METHODS: Before surgery, the renal cell carcinoma was staged and judged to be nonmetastatic and resectable. The patients were randomized prior to surgery into those having radical nephrectomy combined with complete lymph node dissection or into those having radical nephrectomy alone. Postoperatively all patients were followed until progression of disease or death. RESULTS: Of the 772 randomized patients, 41 were not eligible. 383 had a complete lymph node dissection together with a radical nephrectomy. 389 had a radical nephrectomy alone. The complication rate did not differ significantly between the two groups. A complete lymph node dissection in 336 patients revealed absence of lymph node metastases in 325 of them. CONCLUSIONS: The present study shows that complete lymph node dissection does not add morbidity to the radical nephrectomy. After proper preoperative staging, the incidence of unsuspected lymph node metastases is low (3.3%).
OBJECTIVES: To evaluate the frequency of urethral and prostatic lesions on cystectomy specimens for bladder tumour. MATERIAL AND METHODS: This retrospective histological study was based on 260 specimens: radical cystectomies performed in 7 operative sites. The prostate and urethra were analysed in 3 planes (upper, middle and lower thirds). The apex was studied separately. Urethral invasion was identified by continuity of the tumour or by the presence of vesical CIS. RESULTS: Urethral involvement is frequent (30.6% cases) essentially due to contiguous invasion (43/80). CIS is the second pathological association (44 urethral CIS/75 bladder CIS). Prostatic adenocarcinoma was present in 17.8% of cases with a Gleason score > 6 for 30% of lesions. CONCLUSION: The high frequency of urethral and prostatic involvement does not justify preservation of the prostate during cystectomy. A serial prospective study should define the precise criteria able to minimize the risk of conservative surgery.
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OBJECTIVES: To demonstrate a correlation between abdominal computed tomography (CT) data and the histological stage of upper urinary tract tumour (UUTT) in order to more accurately define therapeutic indications. MATERIALS AND METHODS: From 1984 to 1995, 51 patients were treated for UUTT and were assessed by preoperative abdominal CT. 41 of the 51 CT scans were considered to be interpretable and were reviewed retrospectively by a single radiologist. The CT stage and tumour diameter were compared to the pathological stage. RESULTS: CT staging had a reliability of 76%, by combining stages Ta-T2, which could not be distinguished. The sensitivity of CT to assess invasion of the renal parenchyma and ureteric or perirenal fat was 100% and 70%, respectively, with a specificity of 82% and 97%. The accuracy can be improved by decreasing the thickness of sections of the tumour. Tumour diameters (d) of pyelocaliceal tumours, measured by CT and pathology, were closely correlated (r2 = 0.83). All UUTTs less than 3 cm in diameter were found to be superficial on histology. CT correctly estimated the size of these small tumours in 14/15 cases. Overall, by setting the limit at 3 cm, CT was able to detect a superficial pyelocaliceal tumour with a specificity of 92% and a PPV of 93%; however, a CT size > or = 3 cm is not predictive of the histological stage of the lesion. CONCLUSIONS: CT is still imprecise for the staging of UUTT, as it cannot distinguish between Ta, T1 and T2 lesions, and is still not sufficiently reliable in the assessment of invasion of the periurothelial fat or of the renal parenchyma. CT measurement of the diameter of pyelocaliceal tumours can provide an argument in favour of the superficial nature of the lesion and therefore guide the therapeutic decision towards a conservative approach.
OBJECTIVE: Descriptive analysis of an intraoperative radiotherapy protocol (IOR) in the context of conservative management of invasive bladder cancer. METHOD: From November 1988 to September 1994, 24 patients with invasive bladder carcinoma (20 T2, 3 T3) were included in this protocol consisting of: transurethral resection (TUR), neoadjuvant chemotherapy (M.V.C.) in 14 patients, external irradiation (x 18 MV: 48 Gy/24 F/5 weeks) with concomitant chemotherapy (cisplatin 30 mg/day-3 days-2 cycles during irradiation)-follow-up cystoscopy then surgery with IOR (E 9 MeV: 15 Gy). RESULTS: The global 3-year survival was 69%. An invasive intravesical relapse developed in 3 patients (1 salvaged by cystectomy) and a superficial relapse occurred in 1 patient. One patient developed pelvic lymph node progression and 7 developed distant metastases. The early and late toxicity was acceptable with 3 cases of ureteric necrosis or stenoses resolving after medical treatment. CONCLUSION: This series shows encouraging preliminary results. IOR appears to be a technique well adapted to lesions of the fixed portion of the bladder.
PURPOSE: To compare in a randomized clinical trial the therapeutic efficacy of the nonsteroidal antiandrogen flutamide 250 mg tid to testicular androgen suppression by orchidectomy in patients with metastatic prostate cancer. PATIENTS AND METHODS: Between 1989 and 1991, 104 patients aged 74 +/- 8 years with newly diagnosed metastatic prostate cancer, an ECOG performance status 0-2 and no prior hormone manipulation or chemotherapy, were randomized to receive flutamide 250 mg tid (54 patients) or orchidectomy (50 patients). Patients were evaluated at entry and at months 3, 6, 12, 18 and 24. The primary endpoint was duration of progression-free survival, progression being defined as an increase in PSA> 50% over the nadir value at 2 consecutive months or a single PSA rise > 50% over the nadir value with another objective parameter. At progression, the treatment was left to the discretion of the attending urologist. RESULTS: 16 patients (10 flutamide, 6 orchidectomy) are not evaluable. 86 had a minimum follow-up of 36 months, 36/42 and 41/44 have progressed in the orchidectomy and flutamide group with a time of failure of 419 and 496 days (p = 0.32); median time to progression was almost identical in both groups (370 vs. 396 days p = 0.9); overall survival at 69 months irrespective of treatment at relapse was identical in both groups. Side effects were dominated by gynecomastia, hot flushes in both groups, breast tenderness and diarrhea in the flutamide group. Overall, 4 (10%) of the patients in the flutamide group withdrew from therapy because of side effects. The impact of flutamide on sexual potency was not assessed because of the advanced age of the patients. Serum testosterone rose by 50% over baseline level at month 3 to plateau at 25% over baseline level at month 12. CONCLUSION: Although affected by the lack of a clear statistical power due to the small number of patients in each arm, this study shows that in spite of a constant elevation of serum testosterone (25% over baseline) flutamide 250 mg tid may be a reasonable alternative to castration in highly selected patients with well to moderately differentiated low volume metastatic prostate cancer and wishing to avoid the side effects of androgen deprivation, provided they are closely monitored and ready to switch to standard androgen deprivation in the presence of untolerable side effects or suboptimal treatment efficacy as assessed by the inability to achieve a low PSA nadir.
Between 1990 and 1995, we performed 51 endopyelotomies on 38 cases of primary and 13 of secondary obstruction of the ureteropelvic junction (UPJ) using the ureteropelvic invagination technique. Of the 51 patients in the series, 49 have been followed for a minimum of 3 months postoperatively (mean follow-up 16 months). Overall, success was achieved in 38 (77.5%). Endoscopic endopyelotomy was successful in 11 of 13 cases (84.5%) with secondary strictures. When the technique was used for the treatment of primary UPJ stricture, the success rate was only 75% (27 of 36). The presence of a crossing vessel was identified as the cause of failure in five cases of primary strictures; hence, we advocate the use of angiography to identify crossing vessels preoperatively. We recommend the use of the ureteropelvic invagination technique as the first-line therapy for primary hydronephrosis in adults in the absence of a crossing vessel.
Lymphoceles can be observed after renal transplantation. Sometimes lymphoceles can cause symptoms (renal insufficiency, pain). In these cases they require surgical treatment. From january 92 to december 1993 seven patients with complicated lymphoceles were treated. Simple drainage with injections of polyvidone iodine was used in 4 cases without effect. Surgical drainage was performed in 5 cases with complete disappearance of the pouch (on open surgical procedure, four celioscopic procedures). Celioscopic marsupialization of lymphoceles after transplantation is a method of choice and is preferred to open surgery for lymphoceles which develop internally.
Lymphocele is a possible postoperative complication of renal transplantation and its treatment is still controversial. Over a 3-year period (January 1992 to December 1993), 7 patients with a complicated lymphocele were treated by various modalities. Puncture-drainage was used in 7 cases, Povidone sclerotherapy was performed in 4 cases and internal drainage was performed by surgical marsupialization in one case and by laparoscopy in 4 cases. The results of external drainage and sclerotherapy were disappointing, with 1 good result out of 7 and 1 moderate result out of 4, respectively. On the other hand, internal drainage was effective in every case, whether it was performed by surgical or laparoscopic marsupialization. The latter technique avoids the disadvantages of open surgery in high-risk patients. Laparoscopy appears to be the treatment of choice for post-renal transplantation lymphoceles, as it is simple, rapid and effective.
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The Waltz Combilith EL 25 is an endoscopic lithotriptor equipped with an electrohydraulic and ballistic function. The device which generates the ballistic energy is a hand-piece in which a projectile, driven by an electromagnet, strikes a metal rod which transmits the energy to the stone. The diameter and length of the rod are adapted to the site of the stone (bladder + kidney: 1.7 mm rod; ureter: 0.8 mm rod). 29 stones in 25 patients with a mean age of 43 years (range: 25-72) were treated using ballistic energy: 22 ureteric stones (mean dimensions: 9 x 6 mm), 2 renal stones (mean dimensions: 20 x 30 mm) and 5 bladder stones (mean dimensions: 15 mm). Satisfactory stone fragmentation was obtained for 26 of the 29 stones (89.6%) with a mean fragmentation time of 142 seconds. One minimal ureteric perforation was observed (cure without sequelae after drainage by a double J stent). The Combilith EL 25 presents an excellent efficacy/safety ratio and can be used throughout the urinary tract.