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PubMed1968

Air cystoscopy.

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Air↗
PubMed2006

Hexyl aminolevulinate: in the detection of bladder cancer.

Hexyl aminolevulinate, the hexyl ester of 5-aminolevulinic acid, is a photosensitising agent designed to enhance the detection of bladder cancer tumours, in particular highly malignant carcinoma in situ (CIS). After cellular uptake, hexyl aminolevulinate and/or hydrolysed 5-aminolevulinic acid enter the haem biosynthetic pathway and induce accumulation of the photoactive compound protoporphyrin IX (PpIX) in malignant as opposed to nonmalignant cells. PpIX emits red fluorescence when illuminated under blue light. Blue-light fluorescence cystoscopy with hexyl aminolevulinate (hexyl aminolevulinate cystoscopy) was more effective than standard (white-light) cystoscopy for detecting non-muscle-invasive ('superficial') disease in two European, multicentre, phase III trials, which evaluated hexyl aminolevulinate cystoscopy as an adjunct to standard cystoscopy in patients with known or suspected bladder cancer. In one trial, hexyl aminolevulinate cystoscopy detected 96% of the patients with CIS; it identified 28% more patients with CIS than standard cystoscopy. In the other trial, 17% of patients were selected to receive more complete treatment following hexyl aminolevulinate cystoscopy than standard cystoscopy, because of the improved tumour detection rate. Hexyl aminolevulinate cystoscopy is well tolerated as an adjunct to standard cystoscopy; adverse events were those typically associated with standard cystoscopy/biopsy (e.g. postoperative pain).

Aminolevulinic Acid↗
PubMed1997

Thin-section helical computed tomography of the bladder: initial clinical experience with virtual reality imaging.

OBJECTIVES: To evaluate the application of virtual reality imaging of the bladder (virtual cystoscopy) in the detection of bladder masses. METHODS: Six patients (mean age 61 years, range 43 to 75) with hematuria and positive findings on conventional cystoscopy were studied by means of thin-section helical computed tomography of the air-distended bladder. Using volume-rendering algorithms, interactive intraluminal views of the bladder mucosa were generated (virtual cystoscopy). Results of virtual cystoscopy were compared with those of conventional cystoscopy in each case. RESULTS: Twenty-six (100%) of 26 masses (mean size 1.7 cm, range 0.3 to 6), detected on conventional cystoscopy, were visualized on virtual cystoscopy. Twelve of 26 masses measured less than 1 cm in maximum diameter. All masses were pathologically proven transitional cell carcinomas. Virtual cystoscopy was well tolerated by all patients, and no complications occurred. CONCLUSIONS: Our results indicate that virtual cystoscopy is an accurate technique for detection of intrinsic bladder masses. It may represent a radiologic adjunct to conventional cystoscopy for initial evaluation of patients with hematuria and for surveillance of patients after bladder tumor resection.

Adult↗
PubMed1996

One hundred consecutive cystoscopic examinations in children: indications and results.

OBJECTIVE: To evaluate the place and value of cystoscopy in paediatric bladder dysfunction. METHODS: A retrospective analysis of files of 100 children who underwent cystoscopy. RESULTS: In 6 patients with neurogenic bladder dysfunction, cystoscopy was done for the diagnosis of secondary uropathy. In patients with uropathy, of the neonatal group of 6 patients 2 were seen for evaluation of disorders of sexual differentiation and 4 were seen for further diagnosis of neonatal hydronephrosis. In 21 children cystoscopy was part of the diagnostic and/or therapeutic workup for severe urinary-tract infection and in 5 patients for other uropathies. Sixty-two patients with non-neurogenic, non-uropathic bladder dysfunction were selected to undergo cystoscopy on the urodynamic findings. In boys, 36 had an obstruction and 12 had normal cystoscopy. In girls, 4 had an obstruction and 10 had a minimal meatal deformity. CONCLUSIONS: In children with neurogenic dysfunction, cystoscopy is only indicated in diagnosis and therapy of secondary uropathies. Cystoscopy is part of the diagnostic and therapeutic strategy in uropathy. In non-neurogenic, non-uropathic dysfunction urodynamic study allows the selection of patients who have minimal anatomic deformities that provoke the bladder dysfunction and for whom cystoscopy is indicated.

Adolescent↗
PubMed2003

The effect of urethral instrumentation on uroflowmetry.

OBJECTIVE: To evaluate in a prospective study the effect of urethral instrumentation (flexible cystoscopy) on uroflowmetry, and in particular the peak urinary flow rate (Qmax). PATIENTS AND METHODS: Thirty-two consecutive patients (median age 61.8 years, range 24-80) undergoing flexible cystoscopy were included in the analysis. Patients with active urethral stricture disease or urinary infection were excluded. The indications for cystoscopy included haematuria (44%), voiding symptoms (66%), history of bladder cancer (19%), and history of perineal trauma (3%). Patients underwent uroflowmetry immediately before instrumentation. The postvoid residual volume (PVR) was measured by bladder catheterization. After cystoscopy the bladder was completely emptied and then filled with the same volume of sterile normal saline (bladder volume = voided volume + PVR), and the patient underwent a second uroflowmetry. RESULTS: Patients with voiding symptoms (21, 66%) had a median (range) American Urological Association symptom score of 17 (4-34), a Bother score of 16 (1-23), and Quality of Life score of 3 (1-6). The mean Qmax was 16.9 (4.5-36.9) and 13.3 (4.5-39.4) mL/s before and after cystoscopy, respectively (P = 0.029). The mean percentage difference in Qmax was + 27 (- 23 to 139)% higher before than after cystoscopy. After cystoscopy, up to 25% (eight) and 21% (seven) patients had a lower Qmax, from > 15 to < 15 mL/s and from > 12 to < 12 mL/s, respectively. There were no significant differences in the bladder volume and PVR (P = 0.914 and 0.984, respectively). CONCLUSIONS: Urethral instrumentation by flexible cystoscopy significantly alters Qmax. A 'false' mean change in Qmax (favouring improvement) of +27% would result if uroflowmetry data after instrumentation were used at baseline. Therefore, study protocols for benign prostatic obstruction should exclude uroflowmetry data obtained after urethral instrumentation; failure to exclude such data will lead to disproportionately greater improvements in Qmax that are independent of the therapy delivered.

Adult↗
PubMed2000

Clinical application of NMP22 in the management of transitional cell carcinoma of the bladder.

The combination of a noninvasive, quantitative immunoassay, NMP22, with voided urinary cytology prior to cystoscopy was evaluated in patients with urothelial transitional cell carcinoma. Fifty-six patients with a history of transitional cell carcinoma were evaluated. Voided urine was obtained for NMP22 and cytology prior to cystoscopy. One hundred and twenty-three NMP22 assays, 124 cytologies, and 124 cystoscopies were performed. The type of anesthesia used for cystoscopic evaluation was determined by the NMP22 value in 30 patients. Cystoscopy results were considered positive on biopsy-confirmed malignancy. The reference value used for NMP22 was 10.0 U/ml. NMP22, cytology, and the combination of NMP22 and cytology were compared to cystoscopy and to pathologic grading and staging. Thirty-four recurrent transitional cell carcinoma episodes occurred; 22 were low-grade (I-II), and 12 were high-grade (III-IV). Twenty-seven were stage Ta; four were T1; and three were T3b or 4. Within this group, NMP22 detected low- and high-grade tumors equally, as compared to cytology, which was sensitive only to high-grade tumors. Nineteen patients were NMP22-negative and underwent cystoscopy under topical anesthesia; 17 were tumor-free. Eleven patients were NMP22-positive and had anesthesia, and all had visible lesions, which were subjected to biopsy and were resected. Six lesions were tumors, five were inflammatory. Overall sensitivity of combined NMP22 and cytology was 70%; specificity was 72%; positive predictive value was 54%; and negative predictive value was 77%. An accurate assessment of the risk of a bladder cancer can be obtained with NMP22, cytology, and cystoscopy in patients with a history of bladder cancer. NMP22 values can be used to determine the level of anesthesia for cystoscopy in patients with a history of bladder cancer.

Aged↗
PubMed2003

[Virtual CT-pneumocystoscopy: indications, advantages and limitations. Our experience].

PURPOSE: The use of CT volume-rendering techniques allows the evaluation of visceral organs without the need for endoscopy. Conventional endoscopic evaluation of the bladder is limited by the invasiveness of the technique and the difficulty exploring the entire bladder. Virtual evaluation of the bladder by three-dimensional CT reconstruction offers potential advantages and can be used in place of endoscopy. This study investigates the sensitivity of virtual CT in assessing lesion of the bladder wall to compare it with that of conventional endoscopy, and outlines the indications, advantages and disadvantages of virtual CT-pneumocystography. MATERIALS AND METHODS: Between September 2001 and May 2002, 21 patients with haematuria and positive cystoscopic findings were studied. After an initial assessment by ultrasound, the patients underwent pelvic CT as a single volumetric scan after preliminary air distension of the bladder by means of 12 F Foley catheter. The images were processed on an independent workstation (Advantage 3.0 GE) running dedicated software for endoluminal navigation. The lesions detected by endoscopy were classified as sessile or pedunculated, and according to size (more or less than 5 mm). Finally, the results obtained at virtual cystoscopy were evaluated by two radiologists blinded to the conventional cystoscopy results. RESULTS: Thirty lesions (24 pedunculated, 6 sessile) were detected at conventional cystoscopy in 16 patients (multiple polyposis in 3 cases). Virtual cystoscopy identified 23 lesions (19 pedunculated and 4 sessile). The undetected lesions were pedunculated <5 mm (5 cases) and sessile (2 cases). One correctly identified pedunculated lesion was associated with a bladder stone. DISCUSSION: Good quality virtual images were obtained in all of the patients. In only one patient with multiple polyposis the quality of the virtual endoscopic evaluation was limited by the patient's intolerance to bladder distension, although identification of the lesions was not compromised. The overall sensitivity was 77%; this was higher for pedunculated lesions (79%) than for sessile lesions (50%). The virtual technique is less invasive and tends to be associated with fewer complications than is conventional cystoscopy. It also demonstrated a good sensitivity for evaluating pedunculated lesions, allowing evaluation of the bladder base and anterior wall, sites that are commonly poorly accessible at conventional cystoscopy. Further advantages of the virtual technique include the possibility of accurately measuring the extent of the lesion and obtaining virtual images even in patients with severe urethral obstruction and active bleeding. The limitations include the inability to obtain tissue for histologic examination or to perform endoscopic resection of pedunculated lesions. The technique is less sensitive than conventional cystoscopy in the detection of sessile lesions or very small polyps (<5 mm). Furthermore, diffuse wall thickening reduces bladder distension thereby preventing optimal evaluation. The most valuable indication appears to be the follow-up of treated wall lesions. CONCLUSIONS: Virtual CT-pneumocystoscopy can replace conventional cystoscopy in cases with pedunculated lesions when there is no need for biopsy, when the lesions are located at the bladder base or when cystoscopic instrumentation cannot be introduced into the bladder due to stenosis. Virtual pneumocystoscopy can also be used in the follow-up of treated polypoid lesions in association with pelvic CT-angiography.

Aged↗
PubMed1988

Cystosonography: a diagnostic adjunct for the staging of advanced gynecologic malignancies.

Thirty-five patients with advanced gynecologic malignancies (cervical cancer, N = 26; endometrial cancer, N = 5; ovarian cancer, N = 2; vaginal cancer, N = 2) underwent cystoscopy and subsequent cystosonography. The mean age was 61.6 years (range 33-78). The bladder wall was found intact in three patients regardless of the diagnostic procedure. A mere displacement of the bladder wall was observed in four cases using cystoscopy. In all of these women, tumor invasion was ascertained by cystosonography alone. Edema of the bladder mucosa was found in 14 women by cystoscopy and in six women by cystosonography. Endosonography detected tumor invasion of the external layers of the bladder in eight of 14 women. In six of 14 patients, edema was caused by bladder displacement without neoplastic infiltration. Tumor invasion of the bladder was ascertained in six women by cystoscopy and intravesical sonography. Both cystoscopy and intravesical sonography demonstrated neoplastic infiltration and edema of the bladder mucosa in eight patients. Compared with cystoscopy, cystosonographic demonstration of the perivesical region provided better evaluation of the extent of bladder invasion. Cystosonography is a diagnostic adjunct to mere cystoscopy for patients with gynecologic malignancies. This modality is an excellent diagnostic tool, especially if cystoscopy reveals pathologic findings such as edema and displacement or invasion of the bladder wall.

Adult↗