Biomedical subjects
B Cochand-Priollet
Publications and source records attributed to B Cochand-Priollet.
Ureteral and bladder lesions after ballistic, ultrasonic, electrohydraulic, or laser lithotripsy.
Four techniques of intracorporeal lithotripsy are now available: ballistic, ultrasonic, electrohydraulic, and laser. Their therapeutic efficacies have generally been evaluated and compared, but very few data have been available on their relative risks of iatrogenic trauma to the urothelial wall. We conducted a comparative analysis of this risk by testing the pig ureteral and bladder wall with the EMS Lithoclast, Olympus ultrasonic lithotripter, Walz Lithotron EL 23, and Versa Pulse Ho:YAG Coherent Laser. We measured the number of shockwaves or the energy required to perforate the ureter and bladder by delivering shocks perpendicular to the walls. Ureteral perforation was impossible with the 1.0-mm Lithoclast transducer and the 1.5-mm ultrasound transducer. Perforation was induced after 250 shocks with the 0.8-mm Lithoclast transducer, after 110 shocks with the 3F electrohydraulic electrode, and after 0.02 kJ with the laser. Bladder perforation was impossible with the 2.0-mm Lithoclast device and the 3.4-mm ultrasound transducer but was induced after 0.04 kJ had been delivered with the laser. We evaluated the iatrogenic risk under normal conditions of use by delivering the shocks tangentially to the ureteral wall and perpendicular to the bladder wall. We sacrificed animals on days 0, 1, and 6. The immediate histologic lesions induced by the Lithoclast and the ultrasound lithotripter were similar, consisting of a moderate reduction of the epithelial layers or intraepithelial detachments. Electrohydraulic shocks induced almost complete abrasion of the urothelium, and the laser induced extensive lesions of partial or complete necrosis of the urothelial wall.(ABSTRACT TRUNCATED AT 250 WORDS)
[Prognostic factors in prostate cancer. Review of the literature and future perspectives].
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[Tuberculosis. Role of fine needle puncture in the current diagnostic approach].
Twenty-one fine needle aspiration biopsies were performed with a diagnosis of tuberculosis or granulomatous inflammation. The ages of the patients ranged from 26 to 66 years (mean, 36 years); 16 were men and 5 women. Two of them were positive for the human immunodeficiency virus. In twenty cases, the cytological diagnosis was confirmed by culture and/or by recovery under a specific anti-tuberculous treatment. In one case, the necrosis observed cytologically was a tumoral necrosis after histological control. According to these results with a global accuracy of 95.2%, fine needle aspiration biopsy which offers the possibility of a thorough diagnosis in a short time (24 hours or less) is a useful method for the diagnosis of tuberculosis.
[Quality evaluation in cervicovaginal cytology. National program].
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[A kidney tumor not to be disregarded].
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[Interstitial cystitis].
Interstitial cystitis, described for many years, remains a mystery for several reasons. Although the clinical and therapeutic understanding of this disease have improved, the histological features are non-specific and the pathogenesis is still unclear. The aim of this article is to briefly review the current state of knowledge and to remind the reader that this disease must not be underestimated or ignored.
[Follicular Hürthle cell tumors of the thyroid gland].
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[Oncocytomas of the kidney. Analysis of current knowledge and creation of a study group].
Typical oncocytomas are easily recognized. Nevertheless, in recent years, some cases of atypical oncocytomas much more difficult to identify, have been published in French and English medical literature. To further complicate the matter, the tumors are sometimes described as benign and sometimes as malignant. To try to clarify such discrepancies, this article will first set forth the current knowledge, and second provide the basis for a subsequent study designed to simultaneously resolve the histologic and prognostic dilemma.
[Tubulo-papillary tumors of the kidney. A distinct entity with a discussed prognosis].
Tubulopapillary tumors of the kidney represent a group of peculiar interest with specific histological and cytogenetic features. These tumors are distinguished from other renal tumors by their more favorable prognosis.
[Primary epidermoid carcinoma of the kidney pelvis. Characteristics in relation to urothelial carcinomas and review of the literature apropos of a case].
Primary renal squamous cell carcinoma is rare. Its histological is not very difficult, but this case report emphasizes the most important diagnostic criteria and defines the frequency clinical course and clinical findings of these tumors.
[Hepatocellular carcinoma in a patient with psoriasis and methotrexate-induced cirrhosis].
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[Tubulo-papillary tumor of the kidney. Apropos of a case].
Tubulopapillary tumors represent a particular group of the renal tumors. Beyond their characteristic histological features, these tumors can be distinguished from the other renal tumors by the frequency of stage I on histology and by a more favorable prognosis.
Pelvic cancers: staging of 139 cases with lymphography and fine-needle aspiration biopsy.
One hundred thirty-nine patients with pelvic cancers (101 bladder carcinomas, 27 prostatic carcinomas, and 11 testicular tumors) considered for radical surgery were studied with lymphography and percutaneous fine-needle aspiration (FNA) biopsy, and the results were correlated with lymphadenectomy. Adequate material for FNA was obtained in 97%, 88%, and 100% of the bladder, prostatic, and testicular tumors, respectively. For bladder carcinoma, the global accuracy was 58% for lymphography and 93% for FNA; the high false-negative rate for lymphography (48%) was lowered to 25% with FNA, providing that the obturator nodes were punctured. For prostatic carcinomas, it was not possible to evaluate the true-positive rate because the patients with positive FNA results did not under-go surgery. For testicular tumors, lymphography and FNA had almost the same global accuracy (73% and 75%), but FNA had a better specificity (100%) than lymphography (86%). FNA had no false-positive results, which means that positive biopsy results obviate radical surgery; when FNA results are negative a lymphadenectomy should be performed. With its mild morbidity, FNA has a role in the preoperative staging of pelvic carcinomas.
[A case of diffuse inflammatory colonic pseudopolyposis caused by Crohn's disease].
Inflammatory pseudopolyposis of the colon is an uncommon anatomoclinical entity. It is generally associated with ulcerative colitis, Crohn's disease or schistosomiasis. We report a case of a pseudopolyposis in Crohn's disease involving the entire colon. This case was characterized by three particular facts: a) the pseudopolyps were composed of granulation tissues only, b) severe exudative enteropathy was the most important symptom, c) the endoscopic ablation of the polyps, performed for the first time in Crohn's disease pseudopolyposis, resulted in clinical and biological improvement.
[Pancreatic mucinous cystadenocarcinoma with a rapidly fatal course].
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[Abdominal and retroperitoneal masses. Diagnostic value of fine needle cytopunctures. 121 consecutive controlled cases].
A series of 121 consecutive patients with abdominal (96 cases) and retroperitoneal (25 cases) masses was studied in order to evaluate the contribution of cytology in establishing a definite diagnosis of the tumors. The cytologic results on aspirates were obtained with 22 or 23 gauge Chiba needles. At the same time, percutaneous fine needle aspiration biopsy was performed with 19 or 21 gauge fine needles having circumferentially bevelled tips that produced tiny tissue cores suitable for histologic study in 88 cases. These diagnoses were controlled with larger pathological specimens in 78 cases and appeared to be consistent with the clinical and biological course in 43 cases. The sensitivity of the cytologic diagnosis was 83 per cent, and its overall accuracy 87.6 per cent. There were no false-positive results. Furthermore, the method proved to be safe and well-tolerated, with low morbidity (0.8 per cent) and no mortality.
Renal oncocytoma diagnosed by fine-needle aspiration cytology.
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