Automated Society of Fetal Urology (SFU) grading of hydronephrosis on ultrasound imaging using a convolutional neural network.

INTRODUCTION: Grading of hydronephrosis severity on postnatal renal ultrasound guides management decisions in antenatal hydronephrosis (ANH). Multiple systems exist to help standardize hydronephrosis grading, yet poor inter-observer reliability persists. Machine learning methods may provide tools to improve the efficiency and accuracy of hydronephrosis grading. OBJECTIVE: To develop an automated convolutional neural network (CNN) model to classify hydronephrosis on renal ultrasound imaging according to the Society of Fetal Urology (SFU) system as potential clinical adjunct. STUDY DESIGN: A cross-sectional, single-institution cohort of postnatal renal ultrasounds with radiologist SFU grading from pediatric patients with and without hydronephrosis of stable severity was obtained. Imaging labels were used to automatedly select sagittal and transverse grey-scale renal images from all available studies from each patient. A VGG16 pre-trained ImageNet CNN model analyzed these preprocessed images. Three-fold stratified cross-validation was used to build and evaluate the model that was used to classify renal ultrasounds on a per patient basis into five classes based on the SFU system (normal, SFU I, SFU II, SFU III, or SFU IV). These predictions were compared to radiologist grading. Confusion matrices evaluated model performance. Gradient class activation mapping demonstrated imaging features driving model predictions. RESULTS: We identified 710 patients with 4659 postnatal renal ultrasound series. Per radiologist grading, 183 were normal, 157 were SFU I, 132 were SFU II, 100 were SFU III, and 138 were SFU IV. The machine learning model predicted hydronephrosis grade with 82.0% (95% CI: 75-83%) overall accuracy and classified 97.6% (95% CI: 95-98%) of the patients correctly or within one grade of the radiologist grade. The model classified 92.3% (95% CI: 86-95%) normal, 73.2% (95% CI: 69-76%) SFU I, 73.5% (95% CI: 67-75%) SFU II, 79.0% (95% CI: 73-82%) SFU III, and 88.4% (95% CI: 85-92%) SFU IV patients accurately. Gradient class activation mapping demonstrated that the ultrasound appearance of the renal collecting system drove the model's predictions. DISCUSSION: The CNN-based model classified hydronephrosis on renal ultrasounds automatically and accurately based on the expected imaging features in the SFU system. Compared to prior studies, the model functioned more automatically with greater accuracy. Limitations include the retrospective, relatively small cohort, and averaging across multiple imaging studies per patient. CONCLUSIONS: An automated CNN-based system classified hydronephrosis on renal ultrasounds according to the SFU system with promising accuracy based on appropriate imaging features. These findings suggest a possible adjunctive role for machine learning systems in the grading of ANH.

Bladder and Kidney Cancer Diagnosis and Survival Increase With Medicare Eligibility at Age 65.

INTRODUCTION: Medicare eligibility at 65 has been associated with increased diagnosis and survival for certain cancers due to greater health care utilization. We aim to assess for a similar "Medicare effect" for bladder and kidney cancers, which has not been previously established. METHODS: Patients diagnosed with bladder or kidney cancer from 2000-2018 at ages 60-69 years were identified with the Surveillance, Epidemiology, and End Results database. We used age-over-age percent change calculations to characterize trends in cancer diagnoses focusing on patients aged 65. Multivariable Cox models were used to compare cancer-specific mortality across ages at diagnosis. RESULTS: We identified 63,960 patients diagnosed with bladder cancer and 52,316 diagnosed with kidney cancer. Age-over-age change in diagnosis was highest for patients aged 65 compared to all other ages for both cancers (P < .01 for both). Stratified by stage, patients aged 65 had a higher age-over-age change than those aged 61-64 or 66-69 for in situ (P = .01, P < .01, respectively), localized (P = .03, P = .01), and regional (P = .02, P = .02) bladder cancer and localized (P = .01, P = .01) kidney cancer. Bladder cancer patients aged 65 had lower cancer-specific mortality than patients aged 66 (HR = 1.17, P = .01) and 69 (HR = 1.18, P = .01), while kidney cancer patients aged 65 had lower mortality than patients aged 64 (HR = 1.18, P < .01) and 66-69. CONCLUSIONS: The age of 65, marking the onset of Medicare eligibility, is associated with more diagnoses of bladder and kidney cancer. Patients diagnosed at age 65 demonstrate decreased bladder and kidney cancer-specific mortality.

Evaluating the readability of online testosterone search results.

With the budding interest in testosterone therapy (TTh), online health information plays a significant role in patients' health care decisions. Therefore, we evaluated the source and readability of web-based information available to patients regarding TTh on Google. From Google search terms "Testosterone Therapy" and "Testosterone Replacement", 77 unique sources were identified. Sources were categorized as Academic, Commercial, Institutional, or Patient Support, then evaluated using validated readability and English language text assessment tools: the Flesch Reading Ease score, Flesch Kincade, Gunning Fog, Simple Measure of Gobbledygook (SMOG), Coleman-Liau Index and Automated Readability index. The average grade level for understanding academic sources was 16 (college senior); commercial, institutional, and patient support sources were 13 (college freshman); 8 and 5 grade levels, respectively, above the average U.S. adult. Patient support sources were most prevalent, while commercial sources were the least at 35 and 14%, respectively. The average reading ease score was 36.8, indicative of difficult-to-read material overall. These results indicate that the most immediate online sources for TTh information exceed the average reading level of most adults within the U.S., hence more effort should be taken to publish accessible and readable material to improve patient health literacy.

Role of Gut Microbiome in Neoadjuvant Chemotherapy Response in Urothelial Carcinoma: A Multi-Institutional Prospective Cohort Evaluation.

Treatment with neoadjuvant chemotherapy (NAC) in muscle invasive bladder cancer (MIBC) is associated with clinical benefit in urothelial carcinoma. While extensive research evaluating role of tumor mutational expression profiles and clinicopathologic factors into chemoresponse has been published, the role of gut microbiome (GM) in bladder cancer in chemoresponse has not been thoroughly evaluated. A working knowledge of the microbiome and its effect on all forms of cancer therapy in BC is critical. Here we examine gut microbiome of bladder cancer patients undergoing NAC. Overall, there was no significant difference in alpha and beta diversity by responder status. However, analysis of fecal microbiome samples showed that a higher abundance of Bacteroides within both institutional cohorts during NAC was associated with residual disease at the time of radical cystectomy regardless of chemotherapy regimen. Group community analysis revealed presence of favorable microbial subtypes in complete responders. Finally, fecal microbial composition outperformed clinical variables in prediction of complete response (AUC 0.88 vs AUC 0.50), however, no single microbial species could be regarded as a fully consistent biomarker. Microbiome-based community signature as compared to single microbial species is more likely to be associated as the link between bacterial composition and NAC response.

Is Reddit a reliable source for information on erectile dysfunction treatment?

Patients may turn to social media websites, such as Reddit, for information on erectile dysfunction prior to seeking care from a physician. We sought to identify, characterize, and assess the quality of the erectile dysfunction treatments discussed on the highly influential Reddit website. We assessed 2634 comments from two subreddits, r/AskMen and r/ErectileDysfunction, for positive and negative statements regarding treatments for erectile dysfunction. A total of 45 unique treatments were discussed and consisted of changes in sexual behavior (30%), lifestyle changes (29%), medical interventions (23%), talking with a partner about ED (10%), and use of supplements (8%). Only 24.4% of all treatments discussed are in line with current American Urological Association guidelines. Only 43.8% of all positive statements made endorsed a guidelines-based treatment, indicating a high rate of self-proclaimed success with alternative therapies. Our results indicate that there is active discussion of erectile dysfunction treatment on Reddit with a wide range of therapies recommended, however, the majority of the recommendations are not supported by strong clinical evidence.

High flow or low flow? An unusual case of ischemic priapism following gunshot wound to the cervical spinal cord.

Ischemic priapism has rarely been reported in the setting of acute spinal cord injury. Herein, we present a 25 year-old male with cavernous blood gas evidence of ischemic priapism following a traumatic gunshot wound with a retained bullet fragment in the third cervical vertebra. The patient received definitive treatment with corporal aspiration and irrigation, with no evidence of priapism recurrence. This unusual case emphasizes the critical importance of obtaining a cavernous blood gas, even when a common cause of non-ischemic priapism is apparent. Suspicion for ischemic priapism must be maintained, especially in the setting of multiple known risk factors.

Management of genitourinary foreign bodies in a predominantly incarcerated population.

INTRODUCTION Genitourinary foreign body (FB) insertion is a rare occurrence. Commonly reported reasons for insertion include autoeroticism and intoxication, however psychiatric illness is thought to contribute in most cases. In the incarcerated population, malingering plays a prominent role. We examined clinical patient characteristics and management patterns for cases of genitourinary FB insertion and sought to identify risk factors for recidivism. MATERIALS AND METHODS: A retrospective review was performed of all patients presenting to a tertiary trauma center with a genitourinary FB between January 2001-June 2019. Patient demographics, presentation, work up, and management were reviewed. Bivariate and multivariate statistical analyses were performed. RESULTS: Patients were primarily young (33 yo, range: 21-93), male (92%), incarcerated (67%), and had at least one psychiatric diagnosis (71%). Concomitant FB ingestion was present in 56 (41.5) encounters. Risk factors for repeat FB insertion included incarceration (100.0% versus 51.5%, p = < 0.01), psychiatric comorbidity (100.0% versus 51.5%, p = < 0.01), and other concomitant FB insertion/ingestion (68.7% versus 18.2%, p = < 0.01). Common methods of FB extraction included flexible cystoscopy (33.8%), extrinsic pressure (21.0%), rigid cystoscopy (12.8%), and open surgery (8.1%). Fifty-three (39.2%) encounters required anesthesia and 64 (47.4%) encounters required admission. CONCLUSIONS: Genitourinary FBs are usually removed via endoscopic or minimally invasive extraction techniques and the majority are located within the anterior urethra. Special consideration should be given to patients with psychiatric comorbidity, concomitant FB insertion/ingestion, or those presenting from a correctional facility as these characteristics are associated with repeat insertion attempts.