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Biomedical subjects

S Cytron

Publications and source records attributed to S Cytron.

At least 19 recordsLinked to original sources
PubMed2004

Acute prostatitis in middle-aged men: a prospective study.

OBJECTIVES: To determine the clinical outcome of middle-aged men with acute prostatitis, the optimum time for re-assessing their prostate-specific antigen (PSA) levels, and to detect any possible echotextural and vascular changes that remain as a consequence of acute inflammation. PATIENTS AND METHODS: Persistent fever prompted a re-evaluation for prostatic abscess formation in 28 middle-aged men, using transrectal ultrasonography (TRUS) colour Doppler imaging, undertaken at the 3-, 6- and 12-month visits. The results of TRUS were compared with laboratory data and clinical outcome. RESULTS: Two abscesses were detected; 19 (68%) of the patients remained infection-free at the 3-month visit. Serum PSA levels were elevated in 11 (39%) of the patients at this visit; three prostate carcinomas were diagnosed. Increased intraprostatic colour flow was detected in 68% and there were hypoechoic areas in 46% of the patients. CONCLUSION: The re-evaluation for abscess formation should not be postponed for > 48 h. Patients with acute prostatitis tend to have persistent infection. PSA levels could be high even up to 3 months after an acute episode. Middle-aged men with carcinoma could be missed during the acute phase of inflammation. PSA and TRUS monitoring are strongly recommended.

Abscess↗
PubMed2003

Colour Doppler ultrasonography for detecting perineural invasion (PNI) and the value of PNI in predicting final pathological stage: a prospective study of men with clinically localized prostate cancer.

OBJECTIVES: To assess the ability of colour Doppler transrectal ultrasonography (CD-TRUS) to improve the accuracy of detecting perineural invasion (PNI, reported to be an independent predictor of extraprostatic extension) and in predicting the pathological stage of the cancer, comparing it with the results of grey-scale TRUS-guided biopsies. PATIENTS AND METHODS: This prospective study included 47 men with clinically localized disease; all underwent 10-core TRUS-guided biopsy and two bilateral CD-TRUS-guided biopsies, targeted on the area adjacent to the neurovascular bundle. The rates and accuracy of PNI detection on 10-core and CD-TRUS-targeted biopsies were compared with the pathological outcome. Various patient, clinical and pathological factors were compared, and multivariate analysis used to assess the value of the technique in predicting PNI and pathological outcome. RESULTS: CD-TRUS-guided biopsies predicted the presence of PNI in the radical prostatectomy specimens with a sensitivity of 89%, and specificity and positive predictive values of 100%. Seven of 24 (29%) patients with PNI on the needle biopsies had pT3 disease. Conversely, the absence of PNI on guided biopsy accurately predicted pathologically localized disease in 96% (negative predictive value) of patients. However, the results of multivariate analysis showed that serum prostate-specific antigen was the only strong predictor of pT3. CONCLUSION: CD-TRUS is a useful tool for detecting PNI and predicting pathological localized cancer; it can be used in candidates for nerve-sparing radical prostatectomy.

Biopsy, Needle↗
PubMed2003

Effects on pain and anxiety of patients viewing their cystoscopy in addition to a detailed explanation: a controlled study.

OBJECTIVE: To compare the effect of allowing patients to watch their cystoscopy on closed-circuit television and with an explanation during the procedure, with an explanation alone, as involving patients in the process of minimally invasive procedures like colonoscopy or colposcopy has been reported to alleviate pain and anxiety, but these effects may differ in patients who desire participation and those who do not. PATIENTS AND METHODS: Of 51 patients undergoing cystoscopy for the first time, 27 watched the procedure and received explanations, and 24 received explanations alone. They completed an anxiety questionnaire and visual analogue scales (VAS) of anxiety before and after the procedure. Before the procedure they also completed an assessment of desire to be involved in medical decisions and procedures (Kranz Health Opinion Survey, KHOS), and afterwards recorded the pain they had experienced on a scale of 1-10. RESULTS: Anxiety (assessed by VAS) declined after the procedure (P < 0.001) but the anxiety questionnaire showed no change. There was a positive correlation between the KHOS and VAS after the procedure; the more the patient was an 'information seeker' the higher the anxiety. Neither pain nor anxiety were affected by watching the monitor, whether or not KHOS scores were entered as a cofactor. Age and sex had no effect on the results. There were no complications. CONCLUSION: There was no effect of watching the cystoscopy on anxiety and pain. Possibly the explanation received by both groups left no room for further improvement in the intervention group.

Anxiety↗
PubMed2001

Clot retention and spontaneous rupture with secondary pneumatosis of bladder wall following routine cystoscopy.

In this article we report an unusual case of spontaneous rupture of bladder wall following office-cystoscopy. It took place in a patient who suffered from low-stage highgrade carcinoma of bladder with the different aggressive behavior. Finally, he underwent radical cystectomy, which showed micropapillary carcinoma and pneumatosis within the bladder wall. The cause of the latter finding is rather puzzling and has been never reported previously.

Blood Coagulation↗
PubMed2001

Increased incidence of diabetes mellitus in the patients with transitional cell carcinoma of urinary bladder.

The progression of bladder cancer to invasive disease is highly dependent on its ability to penetrate basement membrane of urothelium. Studies on diabetic nephropathy have shown a reduction in proteoglycan content of the glomerular basement membrane. Based on the well-known fact that proteoglycans are one of the main components of basement membrane and extracellular matrix we assessed the relationship between diabetes mellitus, bladder cancer incidence and its behavior. These studies include 252 patients with microscopically confirmed transitional cell carcinoma of bladder, and 549 patients with other urological disorders who served as controls. The prevalence of diabetes mellitus in each group was assessed. The group of patients suffering from transitional cell carcinoma was divided according to etiological risk factors such as cigarette smoking, diabetes and patients that were non-smokers and did not suffer from diabetes mellitus. We assessed the features of bladder cancer behavior in each group. Logistic regression model estimation for statistical analysis was used, with transitional cell carcinoma as a dependent binary variable and age, sexes smoking and diabetes as independent variables. Statistical significance was considered at two levels: p <or=0.001 and p <or=0.05. Odds ratio (OR) adjusted to age, sex, cigarette smoking, diabetes mellitus and 95% Confidence Interval (CI) were calculated for TCC. In the TCC group 22.2% of the patients suffered from diabetes mellitus. In the control group 10.38% suffered from diabetes mellitus. Logistic regression analysis, OR and 95% CI showed a statistically significant relationship between diabetes and TCC. These data are comparable only with smoking (OR 2.3; 95% CI 1.6 3.5 and OR 1.58; 95% CI 1.08 2.4 correspondingly). Based on these data we suggest that diabetes mellitus may be considered an etiological risk factor for bladder cancer development.

Adult↗
PubMed2001

99mTc-MIBI scintigraphy of parathyroid adenomas and its relation to tumour size and oxyphil cell abundance.

The aim of this study was to assess the correlation between technetium-99m methoxyisobutylisonitrile (MIBI) uptake by parathyroid adenomas, oxyphil cell content and volume of the lesions. Thirty-one patients with parathyroid adenomas were evaluated prospectively. Preoperative double-phase 99mTc-MIBI scintigraphy was performed in all patients and tracer uptake by parathyroid lesions was assessed semi-quantitatively employing region of interest ratios to normal adjacent neck areas. Surgical specimens underwent histological evaluation and oxyphil cell content was determined. The intensity of tracer uptake was compared with oxyphil cell content, volume of the lesions and serum levels of calcium and parathormone. 99mTc-MIBI tracer uptake was correlated with oxyphil cell content, volume of parathyroid lesions and the functional status of the parathyroid adenomas. Tracer accumulation in oxyphil cells might partially explain the preferential 99mTc-MIBI retention in parathyroid lesions.

Adenoma↗
PubMed2001

Color Doppler sonography: its real role in the evaluation of children with highly suspected testicular torsion.

The goal of this study was to assess the reliability of color Doppler imaging in boys who presented with acute scrotal pain and borderline clinical findings. The second purpose of the study was to evaluate the potential change in diagnostic accuracy as a result of employing radiological staff with varying levels of experience. Thirty-eight consecutive patients with highly suspected testicular torsion were enrolled in this prospective study. Clinical examination was followed by color Doppler US (7.5-MHz transducer). The staff of radiologists included four residents and three experienced radiologists. All patients underwent surgical exploration. All original reports of residents were reviewed by experienced radiologists and sensitivity with specificity were determined and compared. Original interpretations of color Doppler imaging yielded sensitivity of 77.8% and specificity of 85%, which changed after review to 88.9 and 90%, respectively. Clinical assessment was accurate only in 47.4%. Agreement between original and retrospective color Doppler diagnosis was obtained in 20 of 23 (86.9%) reviewed cases. Color Doppler US may prevent unnecessary surgery in the cases with conclusive normal and increased blood flow. In all other situations scrotal exploration should be performed.

Adolescent↗
PubMed2001

Adrenocortical oncocytoma in pregnancy.

BACKGROUND: Adrenal oncocytomas are uncommon, nonfunctioning tumors occurring most often in endocrine organs. CASE: A 32-year-old woman presented at 25 weeks' gestation complaining of right flank pain. Abdominal ultrasonography and computed tomography revealed a 9 x 10-cm solid right-sided adrenal mass. Endocrine evaluation was normal. At 36 weeks' gestation, she underwent cesarean followed by resection of the adrenal mass. Histopathologic and ultrastructural studies revealed a benign adrenocortical oncocytoma. CONCLUSION: Although rare, adrenocortical oncocytomas should be included in the differential diagnosis of solid, nonfunctioning, adrenal tumors in pregnancy.

Adenoma, Oxyphilic↗
PubMed2000

The value of early and double phase 99Tcm-sestamibi scintimammography in the diagnosis of breast cancer.

The aim of this study was to assess the additional value of early and double phase scintimammography (SMM) with 99Tcm-sestamibi in the detection of breast cancer following initial evaluation by palpation and mammography. Altogether, 322 women with breast lesions evaluated prospectively by palpation, fine-needle aspiration and mammography were assigned a malignancy risk according to the results. Scintimammography was performed in all patients in the prone breast dependent position. Immediate and delayed views were obtained. Acquisition of immediate tracer uptake was termed 'early phase' SMM, whereas a combination of both immediate and delayed phase images was termed 'double phase' SMM. All patients underwent breast biopsy. Both early phase and double phase SMM detected eight of nine tumours in the low-risk group (88.8% sensitivity). In the uncertain cases (moderate-risk group), early phase SMM detected all malignant tumours, but double phase SMM missed one (92.3% sensitivity). In the high-risk group, early phase SMM missed two breast cancers (94.6% sensitivity) and double phase SMM missed four (89.2% sensitivity). Overall, early phase SMM had a sensitivity of 94.9% and a specificity of 80.2% in detecting breast cancer, whereas double phase SMM had a sensitivity of 89.8% and a specificity of 94.3%. Both methods had 100% sensitivity for tumours larger than 1 cm. In conclusion, SMM detected additional breast cancers following an initial evaluation by palpation, fine-needle aspiration and mammography. Our results suggest that double phase SMM is more specific than early phase SMM, although early phase SMM is more sensitive. Whether the interpretation of SMM results should rely on both early and delayed images, or early images alone, should be based on the relative risk of malignancy of the breast lesion as estimated by the initial evaluation.

Adult↗
PubMed1996

Is there an association between cigarette smoking and gland size in benign prostatic hyperplasia?

Several studies have implied a potential inhibitory effect of smoking on the development of clinical benign prostatic hypertrophy (BPH). None of these studies compared gland size and smoking habits. We prospectively test the hypothesis that the identified "negative risk factor" that cigarette smoke has on the development of clinical BPH is mediated through inhibition of gland growth. One hundred and ninety-five men underwent transrectal ultrasonography with prostate volume calculations. A self-administered questionnaire detailing smoking habits was completed by the subjects. Correlations were looked for between various smoking habit parameters and gland size. Prostate gland size did not differ between current smokers, ex-smokers, and never smokers. Prostate volume did not correlate with smoking years (duration of exposure), nor with intensity of exposure (cigarette packyears). Smoke-mediated changes in enzymatic and endocrine pathways that regulate prostatic growth have been well documented. However, whatever "protective" effects smoke may have on BPH, they are not mediated via direct inhibition on gland growth. Alternatively, cigarette smoke may be involved in changing the dynamic component of BPH. Further testing, with special emphasis on irritative and obstructive symptoms, may help elucidate this possibility.

Adult↗
PubMed1994

A comparison between digitally-guided fine needle aspiration and ultrasound-guided transperineal core needle biopsy of the prostate for the detection of prostate cancer.

OBJECTIVE: To prospectively examine the accuracy of fine needle aspiration (FNA) for the detection of prostate cancer. Ultrasound-guided core needle biopsy of the prostate was used as the standard to which the FNA results were compared. PATIENTS AND METHODS: One-hundred patients who had been referred for urological evaluation were suspected of having prostate cancer on the basis of digital rectal examination (DRE) and/or transrectal ultrasound (TRUS). All were further evaluated by digitally guided transrectal FNA and by TRUS-guided transperineal core needle biopsy. RESULTS: Prostate cancer was identified in 54 patients by core needle biopsy and in 45 by FNA. The sensitivity of FNA was 81% and both specificity and positive predictive value were 98%. CONCLUSION: FNA is easily performed, has negligible morbidity and offers prompt results. These data suggest that FNA is a reasonable initial diagnostic procedure for the detection of prostate cancer. Core needle biopsy may be reserved for patients with negative cytology who are clinically suspected of having prostate cancer. In selected patients, FNA may be used as an alternative to core needle biopsy for diagnosis, treatment planning and follow-up.

Aged↗
PubMed1993

Seminal vesicle congestion as a cause of postprostatectomy dysuria.

A series of benign prostatic hypertrophy patients were routinely evaluated, including transrectal echography, before and at regular intervals following surgery. Five patients had persistent symptoms of dysuria at 14-30 months after surgery. There was no infection, residual urine or malignancy to explain their symptoms. The seminal vesicles (SVs) were severely dilated on transrectal echography, a finding which was definitely not present on initial examination. The patients were treated by transrectal echo-guided aspiration of the SVs by the perineal approach. The fluid aspirated was examined, and antibiotics were directly injected into the SVs. In 4 of the patients, there was a dramatic relief of symptoms with prolonged improvement. In only 1 case, following transurethral resection, there was but slight improvement. Dilated, obstructed SVs after prostatectomy, clearly diagnosed on transrectal echography, may be the cause of persistent irritative urinary symptoms. Treatment can be instituted by echo-guided aspiration of the fluid with simultaneous injection of a potent antibiotic, resulting in probable immediate relief.

Aged↗
PubMed1992

Incidental finding of rectal carcinoma during transrectal US for prostatic diseases.

During transrectal ultrasound (TRUS), rectal carcinoma was an incidental finding in seven patients among a series of 5,000 TRUS examinations. TRUS was performed in seven patients with symptoms characteristic of prostatic diseases. All seven patients underwent examination by at least one physician before TRUS and, except for abnormal prostatic findings, no tumors were detected during digital rectal examination (DRE). The tumors were clearly visualized with TRUS and were easily palpated during DREs performed after TRUS. They were large and were located mainly along the posterior and lateral walls of the rectum. All the tumors were diagnosed by means of proctoscopy; the biopsy findings were positive, and the pathologic staging indicated advanced disease: adenocarcinoma of the rectum with a minimum grade of Dukes C. It is recommended that, in addition to evaluation of scans obtained in the transverse plane, the multiplane transducer be used to evaluate the longitudinal plane of the rectum for detection of possible undiscovered tumors.

Adenocarcinoma↗
PubMed1991

Prospective comparative study of magnetic resonance imaging versus transrectal ultrasound for preoperative staging and follow-up of rectal cancer. Preliminary report.

The efficiency of magnetic resonance imaging (MRI) and that of transrectal ultrasound (TRUS) were compared in preoperative staging of 15 patients with rectal cancer and in postoperative follow-up of 12 patients. Thirteen of the 15 patients evaluated for preoperative staging were operated on. Preoperative staging and pathologic finding were identical in 11 patients (84.6 percent) examined by TRUS and in 10 patients (76.9 percent) examined by MRI. Recurrent cancer was detected in 3 of 12 patients in the follow-up group. MRI was able to diagnose correctly 10 of 12 patients (83.2 percent), one patient was misdiagnosed, and in one patient the MRI could not distinguish between fibrous tissue and recurrent cancer. TRUS diagnosed correctly only 5 of 12 patients (41.6 percent). One was falsely diagnosed, and, in 6 patients (50 percent), this examination could not differentiate between fibrous tissue and recurrent tumor. According to our results, both MRI and TRUS have a place in the preoperative staging of patients with rectal cancer. The main differences between the two methods were in the differential diagnoses of fibrous tissue and recurrent cancer. MRI being more specific in detection of recurrence.

Aged↗
PubMed1990

Clinical and pathological findings in prostates following intravesical bacillus Calmette-Guerin instillations.

The prostates of 36 patients who were treated with intravesical bacillus Calmette-Guerin were evaluated by digital rectal examination and transrectal ultrasonography. When abnormal palpatory and/or ultrasonographic findings were detected, core needle biopsies from the suspicious areas were performed. Of the 36 patients 20 underwent biopsies of the prostate. Pathological findings revealed typical granulomas in 8 patients (3 caseating and 5 noncaseating multifocal granulomas). Nonspecific chronic prostatitis was noted in 4 patients and benign prostatic hyperplasia was noted in 8. The number of bacillus Calmette-Guerin instillations ranged from 6 to 19. The interval from initiation of therapy to biopsy ranged from 1.5 to 14.5 months. Caseating granulomas were found during the early course of bacillus Calmette-Guerin instillations (1.5 to 3.0 months), whereas noncaseating granulomas were detected at later stages (4 to 14.5 months). These findings present a high incidence of granuloma formation in patients treated with intravesical bacillus Calmette-Guerin. The duration of therapy is a determinant factor in the induction of granuloma type.

Administration, Intravesical↗
PubMed1988

Value of transrectal ultrasonography for diagnosis and treatment of prostatic abscess.

A new diagnostic and therapeutic application of transrectal ultrasonography (TR-US) is described. TR-US demonstrated one or more well-defined hypoechogenic areas in the prostate gland of 6 patients who presented with clinical signs of urinary tract infection and had only partial response to antibiotic therapy. The presence of a collection of pus in the prostate was confirmed in 4 of 6 patients by transperineal aspiration guided by TR-US, and by prostatic massage or transurethral prostatectomy in the other 2 patients. Ultrasonography also confirmed the resolution of abscesses in 5 patients.

Abscess↗