Prediction models of low-power holmium laser effectiveness in renal stone lithotripsy during retrograde intrarenal surgery.

The objectives of this study are to develop prediction models for total laser energy (TLE) in order to infer surgical time and assist operative planning of intrarenal low-power Ho:YAG laser lithotripsy, and to predict the fragmented volume as well as the stone-free status (SFS). A retrospective review was performed, comprising all single surgeon standardized retrograde intrarenal surgery and low-power Ho:YAG laser lithotripsy at a tertiary care centre between October 2014 and September 2019. Automated measurement of stone volume and stone density (MSD), measured in Hounsfield units (HU), was employed in both pre- and post-operative non-contrast-enhanced computed tomography (NCCT), using a standardized technique on Osirix Lite® software. SFS was defined as complete absence of stone fragments, or fragments < 0.1 cm on meticulous inspection at the end of the procedure, and residual stone burden < 0.0005 cm3 on postoperative NCCT at 3 months. Statistical analysis was performed using the STATA® version 13.1 software for regression models. A p value < .05 was considered statistically significant. A total of 100 patients met the inclusion criteria, requiring a median of 22.3 kJ/cm3 (13.4-36.0) and resulting in a SFS of 41% at 3 months. In a multivariate analysis, according to stone composition, predicted TLE is equal: for uric acid (UA), 11.17 × volume(cm3) + 0.17 × MSD(HU) + 7.48 kJ; for mixed stones, 11.17 × volume(cm3) + 0.17 × MSD(HU) + 6.26 kJ; for calcium oxalate monohydrate (CaOM) stones, 11.17 × volume(cm3) + 0.17 × MSD(HU) + 1.14 kJ; and for calcium phosphate (CaPh) stones 11.17 × volume(cm3) + 0.17 × MSD(HU) - 1.94 kJ. Predicted fragmented volume is equal to 0.93 × volume(cm3) cm3. The significant predictors for SFS were UA stones, the presence of multiple stones, and lower TLE. In clinical practice, our models for intrarenal low-power Ho:YAG laser lithotripsy indicate that larger, denser, and UA stones are associated to higher TLE, and that single and UA stones are more commonly associated to SFS. Since higher TLE means longer operative time, when adjusting for laser parameters, our prediction models may help urologists plan surgeries more precisely based on stone characteristics, ultimately optimizing patients' treatment.

Conventional white light imaging-assisted transurethral resection of bladder tumour (TURBT) versus IMAGE1S-assisted TURBT in non-muscle-invasive bladder cancer patients: trial protocol and 18 months results.

PURPOSE: White light (WL) is the traditional imaging modality for transurethral resection of bladder tumour (TURBT). IMAGE1S is a likely addition. We compare 18-mo recurrence rates following TURBT using IMAGE1S versus WL guidance. METHODS: Twelve international centers conducted a single-blinded randomized controlled trial. Patients with primary and recurrent non-muscle-invasive bladder cancer (NMIBC) were randomly assigned 1:1 to TURBT guided by IMAGE1S or WL. Eighteen-month recurrence rates and subanalysis for primary/recurrent and risk groups were planned and compared by chi-square tests and survival analyses. RESULTS: 689 patients were randomized for WL-assisted (n = 354) or IMAGE1S-assisted (n = 335) TURBT. Of these, 64.7% had a primary tumor, 35.3% a recurrent tumor, and 4.8%, 69.2% and 26.0% a low-, intermediate-, and high-risk tumor, respectively. Overall, 60 and 65 patients, respectively, completed 18-mo follow-up, with recurrence rates of 31.0% and 25.4%, respectively (p = 0.199). In patients with primary, low-/intermediate-risk tumors, recurrence rates at 18-mo were significantly higher in the WL group compared with the IMAGE1S group (31.9% and 22.3%, respectively: p 0.035). Frequency and severity of adverse events were comparable in both treatment groups. Immediate and adjuvant intravesical instillation therapy did not differ between the groups. Potential limitations included lack of uniformity of surgical resection, central pathology review, and missing data. CONCLUSION: There was not difference in the overall recurrence rates between IMAGE1S and WL assistance 18-mo after TURBT in patients with NMIBC. However, IMAGE1S-assisted TURBT considerably reduced the likelihood of disease recurrence in primary, low/intermediate risk patients. REGISTRATION: ClinicalTrials.gov Identifier NCT02252549 (30-09-2014).

Specialist management of testicular cancer: Report of the last 10 years at a Portuguese tertiary referral academic centre.

OBJECTIVES: To describe our experience on testicular cancer (TC) management, underlining the clinical/pathological scope, administered treatments, outcomes, and challenges. TC incidence is rising globally. The predominant histology is germ cell tumour (GCT). In most patients, orchiectomy is curative. Still, a significant proportion of patients will need further tailored treatment. Specialist Reference Centres have proven themselves successful in this setting. Published data regarding TC in Northern Portugal is lacking. METHODS: Retrospective review of consecutive TC patients at a specialist tertiary referral academic centre between January 2010 and December 2020. Statistical analysis was performed using the STATA® version 13.1 software. Multivariate logistic and survival analyses were performed. RESULTS: 125 patients met the inclusion criteria. The median age is 35 (28-40) years; 19% of patients had risk factors for TC - infertility being the most common (11%); 50% of patients wanted sperm cryopreservation prior to treatment; 68% of patients had stage I GCT, 16% stage II, and 17% stage III. Compared to seminoma, non-seminomatous GCT were associated with younger age (p < .001) and higher stages at diagnosis (p = .02); 24% of stage IA/B GCT underwent adjuvant chemotherapy; 47% of patients with metastatic GCT at presentation had refractory disease, requiring tailored treatment. The median follow-up time is 33 (13-65) months. There was no late relapse. The 5-year OS rate is 98.0%. The 5-year survival of metastatic disease is 95.8%. CONCLUSIONS: Despite contemporary excellent cure rates, the challenges of testicular cancer management still endure, especially in advanced stages. Therefore, public awareness is recommended, in order to avoid late presentations - special attention should be given to those who have known risk factors. The existence of Reference Centres is of paramount importance in order to achieve the best outcomes possible.

Calyceal fistula: a problematic, but treatable, complication of renal transplantation.

OBJECTIVE: Calyceal fistula is a rare complication of renal transplantation that may lead to graft loss. This article reports a case of functional recuperation of a graft that seemed condemned to failure. METHODS: 31 year old male patient, submitted to living donor renal transplant, in which was necessary to ligate a superior polar artery found during donor nephrectomy, due to its short length. This resulted in development of a calyceal fistula, unsolved with conservative treatment by percutaneous drainage. A new surgical intervention revealed a large upper pole area of necrotic tissue, corresponding to the obliterated artery irrigation zone. RESULTS: Debridement and calyceal suture were performed and a posterior pyelography confirmed fistula closure. Presently, he is asymptomatic, with stabilized graft function. CONCLUSION: Calyceal fistulas are complications of difficult resolution. However, the present case demonstrates that with an appropriate treatment it is possible to save a graft with no apparent solution at the first place.

Bladder injury during trans-obturator tape surgery in a patient with previous colposuspension: is there a connection?

OBJECTIVE: Bladder injuries are quite rare and complex complications of transobturator tapes in the treatment of female stress urinary incontinence, with very few published cases. The authors present a case report and discuss possible injury mechanisms and the role of cystoscopy in this setting. METHODS: A 51 year-old female with past surgical history of Burch colposuspension underwent an uneventful transobturator tape surgery. After 15 days, she complained of dysuria and frequency. Cystoscopy revealed the tape protruding within the bladder. RESULTS: Reoperation was performed with the sub-urethral segment of the tape removed by vaginal approach and the vesical one excised endoscopically. Presently, the patient is asymptomatic. CONCLUSIONS: In patients with previous incontinence surgical treatments, cystoscopy at the time of surgery should be considered to exclude and treat eventual injuries, in order to avoid future complications.

Lesión vesical en procedimiento con banda transobturatriz con colposuspensión previa: ¿existe alguna conexión? / Bladder injury during trans-obturator tape surgery in a patient with previous colposuspension: is there a connection?

OBJETIVO: La lesión vesical es una complicación bastante compleja y rara de la banda transobturatriz en el tratamiento de la incontinencia urinaria de esfuerzo femenina, con muy pocos casos publicados en la literatura. Los autores presentan un caso y discuten el posible mecanismo de la lesión y el papel de la cistoscopia en este contexto. MÉTODO: Paciente de 51 años, previamente tratada por colposuspensión de Burch, que fue sometida a colocación de banda transobturatriz sin complicaciones. Quince días después desarrolló disuria y polaquiuria. La cistoscopia mostró la banda colocada a nivel intravesical. RESULTADO: Fue realizada re-intervención con la parte suburetral de la banda retirada por abordaje vaginal y la parte vesical restante seccionada con una pinza por vía endoscópica. Actualmente está asintomática. CONCLUSIÓN: En pacientes con tratamientos quirúrgicos previos de incontinencia, la cistoscopia peroperatoria debe ser considerada para excluir y tratar lesiones del tracto urinario inferior, para evitar futuras complicaciones(AU)

OBJECTIVE: Bladder injuries are quite rare and complex complications of transobturator tapes in the treatment of female stress urinary incontinence, with very few published cases. The authors present a case report and discuss possible injury mechanisms and the role of cystoscopy in this setting. METHODS: A 51 year-old female with past surgical history of Burch colposuspension underwent an uneventful transobturator tape surgery. After 15 days, she complained of dysuria and frequency. Cystoscopy revealed the tape protruding within the bladder. RESULTS: Reoperation was performed with the sub-urethral segment of the tape removed by vaginal approach and the vesical one excised endoscopically. Presently, the patient is asymptomatic. CONCLUSIONS: In patients with previous incontinence surgical treatments, cystoscopy at the time of surgery should be considered to exclude and treat eventual injuries, in order to avoid future complications(AU)

Fístula calicial: una complicación problemática pero tratable del transplante renal / Calyceal fistula: a problematic, but treatable, complication of renal transplantation

OBJETIVO: La fístula calicial es una complicación rara del trasplante renal que puede ocasionar la pérdida del injerto. Presentamos un caso de recuperación funcional de un injerto aparentemente condenado al fracaso. MÉTODO: Varón de 31 años, sometido a trasplante renal de donante vivo, en el que fue necesario anular una arteria polar superior hallada durante la extracción del riñón, debido a su escaso calibre. Esto produjo una fistula calicial precoz, sin respuesta al tratamiento conservador con drenaje percutáneo. Una nueva cirugía reveló una granárea de tejido necrótico, correspondiente a la zona de irrigación de la arteria anulada. RESULTADO: Fue realizado el desbridamiento y cierre calicial. Una pielografía posterior confirmó su clausura. Actualmente, el paciente se encuentra asintomático y con injerto funcional estabilizado. CONCLUSIÓN: Las fístulas caliciales son de difícil resolución. Sin embargo, el presente caso nos muestra que con un tratamiento apropiado es posible recuperar un trasplante sin salvación aparente (AU)

OBJECTIVE: Calyceal fistula is a rare complication of renal transplantation that may lead to graft loss. This article reports a case of functional recuperation of a graft that seemed condemned to failure. METHODS: 31 year old male patient, submitted to living donor renal transplant, in which was necessary to ligate a superior polar artery found during donor nephrectomy, due to its short length. This resulted in development of a calyceal fistula, unsolved with conservative treatment by percutaneous drainage. A new surgical intervention revealed a large upper pole area of necrotic tissue, corresponding to the obliterated artery irrigation zone. RESULTS: Debridement and calyceal suture were performed and a posterior pyelography confirmed fistula closure. Presently, he is asymptomatic, with stabilized graft function. CONCLUSION: Calyceal fistulas are complications of difficult resolution. However, the present case demonstrates that with an appropriate treatment it is possible to save a graft with no apparent solution at the first place (AU)