What Should Be Known by a Urologist About the Medical Management of COVID-19's Patients?

PURPOSE OF REVIEW: The alarming number of confirmed COVID-19 cases put a strain on the healthcare systems, which had to reallocate human and technical resources to respond to the emergency. Many urologists became integrated into multidisciplinary teams, dealing with this respiratory illness and its unknown management. It aims to summarize the epidemiological, clinical, diagnostical, and therapeutical characteristics of COVID-19, from a practical perspective, to ease COVID-19 management to non-physician staff. RECENT FINDINGS: We performed a narrative review of the literature regarding COVID-19, updated to May 8th, 2020, at PubMed and COVID resource platforms of the main scientific editorials. COVID-19, characterized by fever, myalgias, dyspnea, and dry cough, varies widely from asymptomatic infection to death. Arrhythmias and thrombotic events are prevalent. Lymphopenia and inflammatory reactant elevation on laboratory, as well as bilateral and peripheral ground-glass opacities or consolidations on X-Ray, are usually found in its assessment. Little is known about SARS-CoV-2 immunology. To date, no therapy has demonstrated efficacy in COVID-19. Of-level or compassionate-use therapies are prescribed in the context of clinical trials. We should become familiar with specific adverse events and pharmacological interactions. The COVID-19 pandemic has paralyzed the urological activity, and its long-term consequences are unpredictable. Despite not being used to deal with respiratory diseases, the urologists become easily qualified to manage COVID-19 by following protocols and being integrated into multidisciplinary teams, helping to overcome the pandemic.

Schwannoma of the seminal vesicle: Case report and review of the literature.

Seminal vesicles can be affected by tumours originating in other locations. However, primary tumours of the seminal vesicle are extremely rare, with less than 100 cases reported in literature. Seminal vesicle adenocarcinoma is the most common type, but there are also other malign lesions. Diagnosis is challenging due to the lack of early symptoms and well-defined criteria. These tumours are usually asymptomatic and discovered incidentally during imaging tests or pelvic surgery. Definitive diagnosis requires anatomopathological analysis. Case report of 58-years-old man with schwannoma of the seminal vesicle. We describe the main characteristics of these tumours as well as their therapeutic approach.

Bibliographic review about the usefulness of ultrasound contrast media in the study of renal masses.

OBJECTIVES: The microbubbles enhanced ultrasound contrast is a novel technique that informs us in real time of renal perfusion and microcirculation. METHOD: We reviewed the literature about its use in the study of renal masses in order to show their actual clinical performance in this condition. RESULT: This technique is useful in the differential diagnosis of pseudotumors, characterization and monitoring of small renal masses, the study of complex renal cysts and controlling the progression of renal masses that underwent ablative treatments. Like any diagnostic technique has some limitations on usage;its rapid contrast wash, being operator-dependent, require some experience and need special software to be correctly interpreted. CONCLUSIONS: The microbubbles enhanced ultrasound contrast is a useful and economic technique for the study and differential diagnosis of the renal masses.

Prospective long-term experience in the treatment of renal tumors with cryotherapy: follow-up with computed tomography scan and contrast-enhanced ultrasound.

Introduction: The aim of this article was to evaluate the oncological results and safety of cryotherapy for the treatment of renal tumors. Material and methods: This study was a prospective review and follow-up of patients who underwent cryotherapy from January 2008 to May 2021. Cryotherapy was offered to patients with bilateral tumors, tumors in solitary kidneys, or comorbid patients. Follow-up consisted of a computed tomography (CT) scan and contrast-enhanced ultrasound (CEUS), with analysis of concordance (kappa index). Overall survival and kidney survival were analyzed (Kaplan-Meier). Results: Cryotherapy was performed 71 times in 67 patients. A total of 74.6% of patients were men. The mean age of patients was 69.7 years (standard deviation (SD) 11.3]. Mean follow-up was 52.7 months (SD 36.2). Mean tumor size was 26.2 mm (SD 7.6). 90% were cT1a, 10% cT1b stage. Type of access was open in 1 patient, laparoscopic in 8, percutaneous US-guided in 8 and percutaneous CT-guided in 54 patients. Biopsy was taken in 60 patients (84.5%) and consisted of renal cell carcinoma (22), oncocytoma (9), papillary carcinoma (4), angiomyolipoma (1), sarcoma (1), and non-conclusive (23).There were 22 complications such as pain in 2 patients, hematoma in 8 and 2 cases of bleeding, all resolved conservatively except for one case of bleeding which required embolization.Recurrences occurred in 16 cases (22.5%). Management was cryotherapy in 25%, radical nephrectomy in 31.3% and surveillance in 43.8%. Concordance between contrast-enhanced ultrasound and CT was 0.8 (excellent).Mean glomerular filtration did not change. One patient developed metastasis.No cancer-specific mortality was found. Overall survival at 12, 24 and 48 months was 98.5%, 96.8% and 76.9% respectively. Kidney survival at 12, 24 and 48 months was 97%, 93.5% and 93.5% respectively. Conclusions: Cryotherapy for renal tumors is a safe treatment for comorbid or solitary kidney patients, with rare major complications and good oncological outcome.

How has the COVID-19 pandemic influenced prostate cancer?-a tertiary single-centre analysis of oncological results, diagnosis and treatment times.

Background: The coronavirus disease 2019 (COVID-19) pandemic has affected care for diseases like cancer. The aim was to evaluate the impact of COVID-19 on waiting times for diagnosis and treatment of prostate cancer (PC), as well as the possible effect on the treatment results in PC patients undergoing radical prostatectomy. Methods: We compared the results of 497 patients who underwent biopsy prior to the COVID-19 pandemic (1 January-31 December 2019) with those of 290 patients biopsied during the COVID-19 pandemic (1 January-31 December 2020). Demographic data, tumour characteristics, type of treatment and diagnosis times were comparable. Prostate specific antigen (PSA) levels were recorded at consultation prior to biopsy and after treatment. Mann-Whitney and chi-square tests were used to compare continuous variables and percentages, respectively. Results: In 2020, there were fewer urology consultations (35,160 vs. 40,225 in 2019). The median PSA in 2020 was significantly higher (14.3 vs. 9.9 ng/dL in 2019). In 2019, 53.1% (N=264) of the biopsies were positive for cancer vs. 47.2% (N=137) in 2020 (P=0.104). In 2020, more patients presented with metastatic disease (7.3% vs. 1.9%, P=0.009). Also, in 2020 there was a longer waiting time for prostate biopsy (42.1 vs. 35.3 days in 2019, P=0.019). A total of 132 patients underwent laparoscopic radical prostatectomy (LARP). The median time until surgery was similar in both years (71.9 vs. 58.29 days). During 2020, a higher percentage of patients had ISUP grade 4 in the surgical specimen (34.3% vs. 17.5%, P=0.07). Furthermore, a higher percentage of aggressive (pT3) tumours were diagnosed (37.2% vs. 27.2%, P=0.08), and the percentage of patients with involvement of surgical margins was also higher (48.6% vs. 29.3%, P=0.027). There were no differences between the groups in terms of biochemical recurrence or persistent PSA at one year (P=0.711). Conclusions: Delayed biopsy during the COVID-19 period did not appear to adversely impact biopsy results. Patients biopsied in 2020 had higher PSA, possibly due to proper triaging. A higher rate of adverse pathology outcomes was observed in patients undergoing radical prostatectomy during the pandemic, probably due to understaging of the biopsy. This study serves to raise awareness of the risk of deterioration of care of PC patients due to possible underdiagnosis.

Identifying Risk Factors for MRI-Invisible Prostate Cancer in Patients Undergoing Transperineal Saturation Biopsy.

PURPOSE: Prostatic multi-parametric magnetic resonance imaging (mpMRI) has markedly improved the assessment of men with suspected prostate cancer (PCa). Nevertheless, as mpMRI exhibits a high negative predictive value, a negative MRI may represent a diagnostic dilemma. The aim of this study was to evaluate the incidence of positive transperineal saturation biopsy in men who have negative mpMRI and to analyse the factors associated with positive biopsy in this scenario. PATIENTS AND METHODS: A retrospective study of men with normal mpMRI and suspicion of PCa who underwent saturation biopsy (≥20 cores) was carried out. A total of 580 patients underwent transperineal MRI/transrectal ultrasound fusion targeted biopsies or saturation prostate biopsies from January 2017 to September 2020. Of them, 73 had a pre-biopsy negative mpMRI (with Prostate Imaging - Reporting and Data System, PI-RADS, ≤2) and were included in this study. Demographics, clinical characteristics, data regarding biopsy results and potential predictive factors of positive saturation biopsy were collected. Univariate and multivariate logistic regression analyses were used to identify independent risk factors for MRI-invisible PCa. RESULTS: The detection rate of PCa with saturation biopsy in patients with negative MRI was 34/73 (46.58%). Out of 34 MRI-invisible prostate cancers detected, 12 (35.29%) were clinically significant PCa (csPCa) forms. Regarding factors of positive biopsy, in univariate analysis, the use of 5-alpha reductase inhibitors and free:total prostate-specific antigen (PSA) ratio were associated with the result of the saturation biopsy. In multivariate analysis, only an unfavourable free:total PSA ratio remained a risk factor (OR 11.03, CI95% 1.93-63.15, p=0.01). Furthermore, multivariate logistic analysis demonstrated that prostate volume >50mL significantly predicts the absence of csPCa on saturation biopsy (OR 0.11, 95% CI 0.01-0.94, p=0.04). CONCLUSION: A free:total PSA ratio <20% is a risk factor for MRI-invisible PCa. Saturation biopsy could be considered in patients with suspected PCa, despite having a negative MRI.

The Usefulness of Contrast-Enhanced Ultrasound in the Assessment of Early Kidney Transplant Function and Complications.

OBJECTIVES: The routine diagnostic method for assessment of renal graft dysfunction is Doppler ultrasound. However, contrast-enhanced ultrasound (CEUS) may provide more information about parenchymal flow and vascular status of kidney allografts. The aim of the study was to assess the effectiveness of CEUS in the immediate post-transplant period, focusing on acute vascular complications. A brief review of available literature and a report of our initial experience is made. MATERIAL AND METHODS: 15 kidney transplant (KT) cases with clinical suspicion of acute surgical complication were assessed with CEUS and conventional Doppler ultrasound (US). In addition, bibliographic review was conducted through PubMed, Embase, and ClinicalKey databases. RESULTS: 10% of KT underwent CEUS, useful for detecting vascular complication or cortical necrosis in 4 (26%) and exclude them in 74%. Grafts with acute vascular complications have a delayed contrast-enhancement with peak intensity lower than normal kidneys. Perfusion defects can be clearly observed and the imaging of cortical necrosis is pathognomonic. CONCLUSIONS: CEUS is a useful tool in the characterization of renal graft dysfunction with special interest on acute vascular complications after renal transplant. It is a feasible technique for quantitative analysis of kidney perfusion, which provides information on renal tissue microcirculation and regional parenchymal flow. Exploration could be done by a urologist at the patient's bedside while avoiding iodinated contrast.

[Prostatic biopsy: From organ biopsy to lesion biopsy. The role of MRI and MRI based biopsy systems]. / Biopsia prostática: de la biopsia del órgano a la biopsia de la lesión. Papel de la resonancia magnética y sistemas de biopsia basados en ella.

OBJECTIVES: Ultrasound guided prostatic biopsy is still the reference method for the diagnosis of prostate cancer. Nevertheless, multiparametric magnetic resonance imaging (mpMRI) has become the best imaging method to identify clinically significant tumors. Form this new situation derives the search of the best method to enable the biopsy of the lesions identified by mpMRI and are not visible on ultrasound. The objective of this work is to review the current role of MRI and the various modalities of MRI based biopsies. METHODS: Non-structured literature review about the current status of prostatic mpMRI and the various methods of biopsy of the lesions identified with it: in bore, cognitive and different commercial fusion software biopsy methods available for directed biopsies. RESULTS: Although results in the literature are very heterogeneous, all three bore biopsy, cognitive biopsy in experienced hands and the various fusion/biopsy software platforms enable a precise biopsy of mpMRI/identified lesions, increasing the yield of each sample obtained. Fusion systems do not imply a clear advantage in global detection over systematic biopsy, except in the subgroup of patients with previous negative biopsy. Nevertheless, they do demonstrate a higher detection rate for clinically significant tumors that increases in patients with a first negative biopsy. Its role in the new therapeutic approaches for prostate cancer is yet to be defined, but it will be growing and essential in a near future. CONCLUSIONS: Multiparametric MRI is already an essential test in diagnostic algorithms for prostate cancer and the systems that enable to biopsy the lesion identified are day by day a more integrated tool in the urological daily practice, and urological procedures that will enable a more precise diagnosis leading to a personalized treatment for each patient.

[Diagnosis and follow-up of benign prostatic hyperplasia by ultrasound]. / Diagnóstico y seguimiento de la hipertrofia prostática benigna mediante ecografía.

OBJECTIVES: The aim of the study is to analyze the utility of ultrasound in the evaluation and treatment selection of patients with benign prostatic hyperplasia (BPH). METHODS: A total of 5000 patients older than 50 years and with prostatic symptoms were evaluated with abdominal ultrasound and in selected cases with transrectal ultrasound. RESULTS: The first ultrasonographic sign of BPH is the increase of anteroposterior and longitudinal diameters. Prostatic volume is measured with a safety of 80%, post-void volume and indirect signs of bladder obstruction are also determined by ultrasound. Upper urinary tract pathological conditions can be also detected. CONCLUSIONS: Ultrasound associated with PSA and urinary flow are adequate to evaluate and select treatment in patients with BPH.

[Ultrasonography for the study of small renal masses]. / Estudio ultrasonográfico de las masas renales de pequeño tamaño.

OBJECTIVES: To perform an update on the usefulness of ultrasound in the study of small size renal tumors and its current possibilities. METHODS: We review the results of ultrasound in this pathology with the addition of the most recent technological advances such as a harmonic digital converters and power color Doppler. We analyze its contribution to the differential diagnosis of the cystic pathology, to the definition of solid masses, to the detection and characterization of small size masses, and to the definition of the vascular patterns of various tumors. RESULTS: Ultrasonography offers a diagnostic safety of 98% in cystic masses, being able to detect them from 0.5 cm diameter in favourable conditions. The differential diagnosis of multiloculated masses, multivesicular hydatid cyst, multiloculated cystic nephroma, and multiloculated cystic carcinoma still poses great difficulty, the same way it happens with other radiological tests. For solid masses, the greater image resolution has lead to a progressive increase in the incidental detection of tumors and the percentage of patients candidates to conservative surgery due to the decrease in size. It is easy to differentiate between adenocarcinoma and angiomyolipoma, up to 85% of the cases, but the rest of the tumors do not have specific characteristics. For small size masses, smaller than 3 cm, ultrasound sensitivity is clearly inferior to CT scan. Power color Doppler helps to confirm the existence of solid masses and helps a better differential diagnosis with pseudo tumors. CONCLUSIONS: The modern ultrasound techniques provide a high cost-effectiveness both in detection and definition of the nature of small size renal masses.

[Transrectal ultrasound-guided prostatic biopsy: contribution of an ultrasound diagnostic unit after ten years of experience]. / Biopsia transrectal ecodirigida de próstata: aportación de una unidad urológica de diagnóstico ecográfico tras 10 años de experiencia.

OBJECTIVES: Although transrectal ultrasound-guided (TRUS) prostatic biopsy is the procedure of choice for the diagnosis of prostate cancer (PC), neither the ideal number of cores nor the number of repeated biopsies, nor the required diagnostic yield have been established. After our experience of ten years with TRUS biopsy we perform a review of the technique and its indications. METHODS: PSA, ultrasound features, and pathologic data of 6000 patients undergoing modified sextant TRUS biopsy between 1994 to December 2002 were collected. 222 patients undergoing ten-core TRUS biopsy were included in an experimental group to study the role of the extended biopsy. The contribution of the extra cores to the diagnostic yield in the experimental group was studied to determine the effectiveness of the extended biopsy, using as a control group 552 patients undergoing sextant TRUS biopsy during 2002. Both groups were comparable for the study variables at the start of the study. RESULTS: The incidence of PC in the first biopsy in the group of 6000 patients was 39.1% (2345/6000). Patients with PSA between 4 and 10 ng/ml have an incidence of PC greater than 50% among prostates smaller than 20 cc, diminishing down to 8.9% in those greater than 50 cc. The percentage of PC among patients with negative digital rectal examination (DRE), normal TRUS, and PSA below 4 ng/ml was 16.7%. The diagnostic yield for PSA density lower than 0.11 ng/ml/cc was lower than 8%. The free/total PSA ratio shows a 13.7% incidence of PC with values higher than 0.24. Multivariate logistic regression analysis showed that the only non-significant parameter was free/total PSA. Sixty (27.15%) patients of the extended TRUS biopsy group had PC. Only 2.25% of the 221 patients benefited from the augmented number of biopsies. There were no significant differences in the figures of prostate cancer between groups. Only PSA and volume where significant in the multivariate logistic regression analysis; number of samples, PSA density and age lacked of influence in the detection of PC. CONCLUSIONS: The sextant biopsy model obtaining cores from the lateral horns of the prostate continues to be the reference for TRUS biopsy, and the extended biopsy is not applicable to all patients from the beginning do to the small increase in the diagnostic yield. Isolated PSA may not be the unique reference to indicate TRUS biopsy, being volume, in our experience, a definitive factor for the adjustment of high risk levels.

[Testicular ultrasonography]. / Ecografía testicular.

OBJECTIVES: To review the contribution of ultrasound to the differential diagnosis of scrotal pathology, both testicular and adnexal. METHODS: We performed a bibliographic review on the topic, adding the experience of our Unit over the years; we classified the pathology in testicular and extratesticular, separating liquid and solid lesions, and a miscellaneous group of unclassifiable cases. RESULTS: Currently, ultrasonography with high frequency equipment allows not only to differentiate between intra and extratesticular lesions, but also to identify specific lesions, the manage of which may include follow-up without need of unavoidable surgery. CONCLUSIONS: Ultrasonography is a painless simple test that may be repeated without inconvenience so that it is the first test to be indicated for any problem of the scrotal content.

[Infertility and varicocele through history]. / La infertilidad y el varicocele a través de la historia.

OBJECTIVES: To perform a historical review of varicocele and male infertility with the aim to find descriptions that first related them. In parallel, we review the evolution of treatment for varicocele up to date. METHODS/RESULTS: We refer to multiple authors and their treaties on Medicine, from first to 20th Century, in which descriptions of these pathologies are found, focusing on descriptions of the surgical technique for treatment of varicocele and their application in Spain. CONCLUSIONS: Varicocele was already described in treaties from the first century having bee of n its treatment predominantly surgical from the first description to our days. Not identified as a cause of infertility until late, by the end of the 19th century, it is the main indication for treatment nowadays. The surgical technique has suffered many modifications over time, both in the approach as in the "radicality" of a vascular ligature applied.

[Penile metastasis of a prostatic adenocarcinoma]. / Metástasis peneana de adenocarcinoma prostático.

OBJECTIVES: To report one case of prostate carcinoma with metastasis to the corpora cavernosum. METHODS: We report the case of a 79-year-old patient with the diagnosis of Gleason 9 prostatic adenocarcinoma who presented a hard lesion on the glans penis one year after starting androgen blockade. The patient underwent palliative TURP and biopsy of the lesion. RESULTS: Pathology reported a penile metastasis of prostatic adenocarcinoma. CONCLUSIONS: Penile metastasis are rare, usually appearing in advanced stages of the primary disease; their treatment is palliative and should only be carried out in symptomatic patients.

[Hypogastric artery embolization as a palliative treatment for bleeding secondary to intractable bladder or prostate disease]. / Embolización de arterias hipogástricas como tratamiento paliativo del sangrado secundario a enfermedad vesical o prostática intratable.

OBJECTIVES: Bleeding secondary to severe vesicoprostatic pathology (mainly neoplasic disease and radiation cystitis) may be a serious clinical management problem due to its morbidity and associated increased resources demand in the form of admissions, transfusions and other measures. We review a series of patients embolized for this purpose, its efficacy, tolerability and adverse events. METHODS: We review 8 patients who underwent hypogastric arteries embolization between July 1998 and December 2001, analyzing indications, efficacy and duration, tolerability, and consequences. Right femoral artery access was undertaken in all except one case that needed bilateral femoral accesses. Embolization was achieved by means of coils and particles. All procedures were performed under local anaesthesia. RESULTS: 9 procedures were performed in 8 patients. 3 patients presented with hematuria due to radiation cystitis, 3 from prostatic carcinoma, and 2 with urethrorragy from urethral relapses after cystectomy. 7/9 embolizations were effective achieving immediate complete or almost complete bleeding control; in one case control was partial; another one had limited or no effect. Selective embolization of distal arteries was performed in 3 cases; all the remainders underwent direct hypogastric trunk embolization sparing the superior gluteal artery. Effect lasted between 1 and 31 months. 4 patients died, 3 of them without haematuria, 1 because of an intercurrent disease, and the others from disease progression. 2 patients underwent posterior surgery, one due to recurrent haematuria, and the other, a case of urethral tumour, due to partial failure; partial cystectomy and urethrectomy were performed respectively. 2 patients needed administration of morphic derivatives after embolization, all the others were managed with magnesium metamizol. Only one patient referred mild transitory gluteal claudication. CONCLUSIONS: Percutaneous arterial embolization is an effective instrument to treat patients with haematuria or urethrorragy and severe lower urinary tract pathology in whom curative treatments are not applicable due to their general status, life expectancy, or tumor status.

[Adrenal cysts: presentation of 6 cases]. / Quistes suprarrenales: presentación de seis casos.

OBJECTIVES: We report six cases of adrenal cyst, a rare pathologic entity which poses diagnostic problems and therapeutic controversies. METHODS: We report six cases of adrenal cysts in 4 female and 2 male patients ages 26 to 68 years. All cases underwent surgical treatment. RESULTS: Pathologic studies showed that all were adrenal cysts without malignancy in any case. CONCLUSIONS: Adrenal cysts are a rare disease of which correct diagnosis is difficult so that many times patients undergo surgery without a proper preoperative diagnosis. There are controversies about the right management of adrenal cysts.

[Acute renal failure as the beginning of glandular cystitis. Review of the bibliography]. / Fracaso renal agudo como debut de la cistitis glandular. Revisión de la bibliografía.

OBJECTIVES: To report one clinical case of obstructive uropathy secondary to bladder pseudotumor. METHODS: We report the case of a 74-year-old male with obstructive acute renal failure of unknown etiology. RESULTS: After resolution of the acute renal failure by percutaneous nephrostomy, action was undertaken to control possible etiologic causes, resolving the bilateral ureter entrapment and bladder inflammatory process. CONCLUSIONS: Glandular cystitis is a nosological entity which in its severe forms behaves clinically and radiologically as a bladder pseudotumor, so that should be considered as a part of the differential diagnosis with bladder tumors. Final diagnosis comes from pathology. For treatment, it is basic to eliminate any predisposing factor, either infectious, or irritative, or obstructive; if no action is carried out on these factors other therapeutic measures as the aforementioned are not effective. Strict follow-up should be undertaken (every six months) because of the high incidence of bladder adenocarcinoma.

[Current status of high-resolution scrotal echography]. / Estado actual de la ecografia escrotal de alta resolución.

OBJECTIVES: To review the main images that can be observed by ultrasound, trying to highlight what decision to take after their finding: exploratory surgery, orchyectomy, or follow-up. METHODS: We performed a bibliographic review about the topic and incorporated our personal experience with scrotal ultrasound. Given that there is an extensive variety of anomalies that can be observed we divide them in liquid and solid lesions, and these in intra or extratesticular, plus a group of lesions that do not qualify in the previous groups. RESULTS: The development of high frequencies transducers (8-10 Mhz) and a greater experience today allows to diagnose not only testicular tumors but also a number of benign clinical entities, with enough specificity in some of them as to avoid surgery. CONCLUSIONS: Ultrasound is a simple test, painless, and can be repeated without trouble, so that it is the first test that should be ordered when managing any intra scrotal problem.

[AMS-800 artificial sphincter. Our experience in the last 20 years]. / Esfinter artificial AMS-800. Nuestra experiencia en los últimos 20 años.

OBJECTIVE: To present a series of 63 patients with urinary incontinence due to sphincteric incompetence who underwent the implantation of an AMS-800 artificial sphincter. METHODS: From 1984 to December 2002 a total of 69 patients received this prosthesis, 63 of which were available for review. The cause of incontinence was sphincter incompetence in all cases, said secondary to prostate surgery, neurogenic bladder, post-traumatic urethral lesion, and epispadias. 52 of them were placed in the bulbar urethra, and 11 in the bladder neck. The cuff diameters varied from 4 to 10 cm and reservoir pressures from 51-60 to 71-18 H2O cm. RESULTS: The complications that appeared, ordered by frequency, were: malfunction, infection and rejection or exteriorization, fistula, and unappropriate size. The total number of reoperations was 39 in 28 patients. Functional results were successful in 48 cases and failure in 15. CONCLUSIONS: The use of an AMS-800 prosthesis for the treatment of urinary incontinence due to sphincteric incompetence is effective but not without complications. The most frequent indication was following prostate surgery, being this group the one that obtains the best results. Patients with incontinence of neurogenic origin have the highest complication rate, and the worst results in relation to vascularization and tissue trophism abnormalities. In female patients we prefer other techniques that have similar results, are technically easier and more economic.

[Acute obstructive kidney failure after kidney transplantation caused by calculi transfer from donor]. / Fracaso renal agudo obstructivo post-trasplante renal por trasferencia litiásica desde el donante.

OBJECTIVES: To report one case of lithiasis transference from the donor associated with renal transplant. METHODS: 53-year-old female with obstructive uropathy within the first post transplant month. RESULTS/CONCLUSIONS: Lithiasis transference after transplant is a cause of early obstructive uropathy after kidney transplantation. The low the incidence of lithiasis transference does not justify the performance of x-ray and/or ultrasound of the donor organ in terms of cost effectiveness. Extracorporeal shockwave lithotripsy is a valid therapeutic option on transplanted kidneys.