Split scar sign to predict complete response in rectal cancer after neoadjuvant chemoradiotherapy: systematic review and meta-analysis.

OBJECTIVES: Magnetic resonance imaging (MRI) is the modality of choice for rectal cancer initial staging and restaging after neoadjuvant chemoradiation. Our objective was to perform a meta-analysis of the diagnostic performance of the split scar sign (SSS) on rectal MRI in predicting complete response after neoadjuvant therapy. METHODS: MEDLINE, EMBASE, and Cochrane databases were searched for relevant published studies through June 2023. Primary studies met eligibility criteria if they evaluated the diagnostic performance of the SSS to predict complete response on pathology or clinical follow-up in patients undergoing neoadjuvant chemoradiation. A meta-analysis with a random-effects model was used to estimate pooled sensitivity and specificity, area under the curve (AUC), and diagnostic odds ratio (DOR) of the SSS. RESULTS: A total of 4 studies comprising 377 patients met the inclusion criteria. The prevalence of complete response in the studies was 21.7-52.5%. The pooled sensitivity and specificity of the SSS to predict complete response were 62.0% (95% CI, 43.5-78.5%) and 91.9% (95% CI, 78.9-97.2%), respectively. The estimated AUC for SSS was 0.83 (95% CI, 0.56-0.94) with a DOR of 18.8 (95% CI, 3.65-96.5). CONCLUSION: The presence of SSS on rectal MRI demonstrated high specificity for complete response in patients with rectal cancer after neoadjuvant chemoradiation. This imaging pattern can be a valuable tool to identify potential candidates for organ-sparing treatment and surveillance. CLINICAL RELEVANCE STATEMENT: SSS presents high specificity for complete response post-neoadjuvant. This MRI finding enhances rectal cancer treatment assessment and aids clinicians and patients in choosing watch-and-wait over immediate surgery, which can potentially reduce costs and associated morbidity. KEY POINTS: •Fifteen to 50% of rectal cancer patients achieve complete response after neoadjuvant chemoradiation and may be eligible for a watch-and-wait strategy. •The split scar sign has high specificity for a complete response. •This imaging finding is valuable to select candidates for organ-sparing management.

Consideraciones actuales sobre el diagnóstico y tratamiento del cáncer tiroideo

Introducción: Desde los inicios de este siglo se ha producido un notable incremento mundial de la tasa de incidencia del cáncer de tiroides, el cual generalmente tiene un curso larvado y asintomático. Objetivo: Profundizar en el conocimiento de los aspectos novedosos del diagnóstico oportuno y tratamiento personalizado del cáncer tiroideo. Desarrollo: El cáncer tiroideo es la enfermedad maligna más frecuente del sistema endocrino. En las últimas décadas, su incidencia se ha incrementado aceleradamente, aunque la mortalidad se ha mantenido baja. El descubrimiento y desarrollo de nuevas técnicas de imágenes, inmunológicas y moleculares, han permitido estudiar en profundidad la neoplasia de la tiroides. Esto ha favorecido avanzar en los aspectos que más han modificado la nueva actitud respecto al diagnóstico oportuno y su tratamiento. Conclusiones: En años recientes, los avances de las investigaciones básicas, clínicas y traslacionales (aplicación real de los conocimientos básicos en la práctica clínica), han transformado antiguos conceptos relacionados con el cáncer tiroideo y han dotado de nuevas herramientas para el diagnóstico oportuno y tratamiento personalizado.

Introduction: Since the beginning of this century there has been a notable increase worldwide in the incidence rate of thyroid cancer, which generally has a latent and asymptomatic course. Objectives: To deepen the knowledge of the novel aspects of timely diagnosis and treatment of thyroid cancer. Development: Thyroid cancer is the most frequent malignant disease of the endocrine system. In recent decades, its incidence has increased rapidly, although mortality has remained low. The discovery and development of new imaging, immunological and molecular techniques have made it possible to study thyroid neoplasm in depth. This has favored advancing in the aspects that have most modified the new attitude regarding timely diagnosis and its treatment. Conclusions: In recent years, advances in basic, clinical and translational research have transformed old concepts related to thyroid cancer and have equipped with new tools for timely diagnosis and personalized treatment.

Combined artificial intelligence and radiologist model for predicting rectal cancer treatment response from magnetic resonance imaging: an external validation study.

PURPOSE: To evaluate an MRI-based radiomic texture classifier alone and combined with radiologist qualitative assessment in predicting pathological complete response (pCR) using restaging MRI with internal training and external validation. METHODS: Consecutive patients with locally advanced rectal cancer (LARC) who underwent neoadjuvant therapy followed by total mesorectal excision from March 2012 to February 2016 (Memorial Sloan Kettering Cancer Center/internal dataset, n = 114, 41% female, median age = 55) and July 2014 to October 2015 (Instituto do Câncer do Estado de São Paulo/external dataset, n = 50, 52% female, median age = 64.5) were retrospectively included. Two radiologists (R1, senior; R2, junior) independently evaluated restaging MRI, classifying patients (radiological complete response vs radiological partial response). Model A (n = 33 texture features), model B (n = 91 features including texture, shape, and edge features), and two combination models (model A + B + R1, model A + B + R2) were constructed. Pathology served as the reference standard for neoadjuvant treatment response. Comparison of the classifiers' AUCs on the external set was done using DeLong's test. RESULTS: Models A and B had similar discriminative ability (P = 0.3; Model B AUC = 83%, 95% CI 70%-97%). Combined models increased inter-reader agreement compared with radiologist-only interpretation (κ = 0.82, 95% CI 0.70-0.89 vs k = 0.25, 95% CI 0.11-0.61). The combined model slightly increased junior radiologist specificity, positive predictive value, and negative predictive values (93% vs 90%, 57% vs 50%, and 91% vs 90%, respectively). CONCLUSION: We developed and externally validated a combined model using radiomics and radiologist qualitative assessment, which improved inter-reader agreement and slightly increased the diagnostic performance of the junior radiologist in predicting pCR after neoadjuvant treatment in patients with LARC.

Active Surveillance of Thyroid Microcarcinomas: a Critical View.

PURPOSE OF THE REVIEW: There has been an increasing interest on active surveillance for papillary thyroid microcarcinomas (PTMC) in the literature. We will analyze the contributions of those authors who support this approach in most patients with low-risk tumors. RECENT FINDINGS: The development of molecular methods to effectively detect aggressive PTMC at the fine-needle aspiration biopsy will enable the sound indication of immediate surgery in those patients, assuring the other individuals with the far more frequent indolent PTMC will undergo active surveillance with less anxiety. Several studies compared the quality of life between patients with PTMC who underwent active surveillance with immediate total thyroidectomy. However, thyroid lobectomy is a quite acceptable intermediate alternative for most patients with PTMC, with less surgical morbidity. It is important to wait for worldwide validation, with reports from low- and middle-income areas, before recommending the routine adoption of active surveillance for patients with PTMC, due to difficult logistic obstacles in those environments.

The influence of nursing team's behavior in adverse event following immunization surveillance / Influencia del comportamiento del equipo de enfermería en la vigilancia de eventos adversos posvacunación / A influência das condutas da equipe de enfermagem na vigilância de eventos adversos pós-vacinação

ABSTRACT Objectives: to analyze the effects of nursing professionals' behavior in adverse event following immunization surveillance. Methods: a cross-sectional study of 384 participants who received vaccines. Information on vaccination history, administered vaccines and vaccination guidelines were analyzed. Descriptive and bivariate analyzes were performed using simple logistic regression (unadjusted Odds Ratio). Results: guidelines on events (PR=1.8; p=0.001) and conducts regarding their occurrence (PR=1.7; p=0.001) are activities that influence adverse event following immunization surveillance. More than half of participants did not receive guidance on the vaccines administered, the events and the conduct in case of an occurrence. Only 38.5% were instructed about the vaccines administered and 40.6% about adverse events. In the presence of an event, 29.9% reported that they sought services for notification. Conclusions: proper screening, providing guidance on vaccines and adverse events are essential preventive measures to strengthen adverse event following immunization surveillance.

RESUMEN Objetivos: analizar los efectos del comportamiento de los profesionales de enfermería en la vigilancia de eventos adversos posvacunación. Métodos: estudio transversal con 384 participantes que recibieron vacunas. Se analizó la información sobre el historial de vacunación, las vacunas administradas y las pautas de vacunación. Se realizaron análisis descriptivos y bivariados mediante regresión logística simple (Odds Ratio no ajustada). Resultados: las guías sobre eventos (RP=1,8; p=0,001) y las conductas en cuanto a su ocurrencia (RP=1,7; p=0,001) son actividades que influyen en la vigilancia de eventos adversos tras la vacunación. Más de la mitad de los participantes no recibieron orientación sobre las vacunas administradas, los eventos y la conducta en caso de ocurrencia. Solo el 38,5% recibió instrucciones sobre las vacunas administradas y el 40,6% sobre los eventos adversos. Ante la presencia del evento, el 29,9% informó que solicitó servicios de notificación. Conclusiones: realizar un cribado adecuado, orientar sobre las vacunas y los eventos adversos son medidas preventivas fundamentales para fortalecer la vigilancia de los eventos adversos posvacunación.

RESUMO Objetivos: analisar os efeitos das condutas dos profissionais de enfermagem na vigilância de eventos adversos pós-vacinação. Métodos: estudo transversal, com 384 participantes que receberam vacinas. Analisadas informações de antecedentes vacinais, vacinas administradas e orientações sobre vacinação. Realizadas análises descritivas e bivariada, por meio de regressão logística simples (Odds Ratio não ajustada). Resultados: as orientações sobre os eventos (RP=1.8; p=0,001) e as condutas frente a sua ocorrência (RP=1.7; p=0,001) são atividades que influenciam a vigilância dos eventos adversos pós-vacinação. Mais da metade dos participantes não recebeu orientações sobre as vacinas administradas, os eventos e as condutas em caso de ocorrência. Somente 38,5% foram orientados sobre as vacinas administradas e 40,6%, sobre os eventos adversos. Na presença do evento, 29,9% relataram que procuraram os serviços para notificação. Conclusões: realizar triagem adequada, orientar a respeito das vacinas e dos eventos adversos são medidas preventivas essenciais para fortalecer a vigilância de eventos adversos pós-vacinação.

The role of magnetic resonance imaging in active surveillance of prostate cancer.

Active surveillance (AS) is an important strategy to avoid overtreatment of prostate cancer (PCa) and has become the standard of care for low-risk patients. The role of magnetic resonance imaging (MRI) in AS has expanded due to its ability to risk stratify patients with suspected or known PCa, and MRI has become an integral part of the AS protocols at various institutions. A negative pre-biopsy MRI result is associated with a very high negative predictive value for a Gleason score ≥ 3+4. A positive MRI result in men who are otherwise eligible for AS has been shown to be associated with the presence of high-grade PCa and therefore with ineligibility. In addition, MRI can be used to guide and determine the timing of per-protocol biopsy during AS. However, there are several MRI-related issues that remain unresolved, including the lack of a consensus and guidelines; concerns about gadolinium deposition in various tissues; and increased demand for higher efficiency and productivity. Similarly, the need for the combined use of targeted and systematic sampling is still a matter of debate when lesions are visible on MRI. Here, we review the current AS guidelines, as well as the accepted roles of MRI in patient selection and monitoring, the potential uses of MRI that are still in question, and the limitations of the method.

A vigilância ativa (VA) é uma estratégia importante para evitar o tratamento excessivo do câncer de próstata (CaP) e tornou-se o padrão de atendimento a pacientes de baixo risco. O papel da ressonância magnética (RM) na VA tem se expandido, devido à sua capacidade de estratificar o risco pacientes com CaP suspeito ou diagnosticado, tornando-se parte integrante dos protocolos de VA em várias instituições. Uma RM pré-biópsia negativa está associada a um valor preditivo negativo muito alto para o diagnóstico de Gleason ≥ 3+4. Um exame positivo em homens que são elegíveis para VA tem se mostrado associado à presença de CaP de alto grau e inelegibilidade para VA. A RM também pode ser usada para orientar e determinar o tempo ideal de uma biópsia, ou por protocolo, durante a VA. Há, no entanto, várias questões relacionadas à RM que permanecem não resolvidas. Estas incluem a falta de consenso ou diretrizes, preocupações com o depósito de gadolínio em vários tecidos e aumento da pressão por maior eficiência e produção. Da mesma forma, a necessidade de biópsia sistemática combinada à dirigida continua a ser uma questão controversa, quando as lesões são visíveis na RM. Revisaremos as atuais diretrizes de VA, os papéis consensualmente aceitos da RM na seleção e monitoramento dos pacientes, potenciais usos, ainda discutíveis, e as limitações do método.

The role of magnetic resonance imaging in active surveillance of prostate cancer / O papel da ressonância magnética na vigilância ativa do câncer de próstata

Abstract Active surveillance (AS) is an important strategy to avoid overtreatment of prostate cancer (PCa) and has become the standard of care for low-risk patients. The role of magnetic resonance imaging (MRI) in AS has expanded due to its ability to risk stratify patients with suspected or known PCa, and MRI has become an integral part of the AS protocols at various institutions. A negative pre-biopsy MRI result is associated with a very high negative predictive value for a Gleason score ≥ 3+4. A positive MRI result in men who are otherwise eligible for AS has been shown to be associated with the presence of high-grade PCa and therefore with ineligibility. In addition, MRI can be used to guide and determine the timing of per-protocol biopsy during AS. However, there are several MRI-related issues that remain unresolved, including the lack of a consensus and guidelines; concerns about gadolinium deposition in various tissues; and increased demand for higher efficiency and productivity. Similarly, the need for the combined use of targeted and systematic sampling is still a matter of debate when lesions are visible on MRI. Here, we review the current AS guidelines, as well as the accepted roles of MRI in patient selection and monitoring, the potential uses of MRI that are still in question, and the limitations of the method.

Resumo A vigilância ativa (VA) é uma estratégia importante para evitar o tratamento excessivo do câncer de próstata (CaP) e tornou-se o padrão de atendimento a pacientes de baixo risco. O papel da ressonância magnética (RM) na VA tem se expandido, devido à sua capacidade de estratificar o risco pacientes com CaP suspeito ou diagnosticado, tornando-se parte integrante dos protocolos de VA em várias instituições. Uma RM pré-biópsia negativa está associada a um valor preditivo negativo muito alto para o diagnóstico de Gleason ≥ 3+4. Um exame positivo em homens que são elegíveis para VA tem se mostrado associado à presença de CaP de alto grau e inelegibilidade para VA. A RM também pode ser usada para orientar e determinar o tempo ideal de uma biópsia, ou por protocolo, durante a VA. Há, no entanto, várias questões relacionadas à RM que permanecem não resolvidas. Estas incluem a falta de consenso ou diretrizes, preocupações com o depósito de gadolínio em vários tecidos e aumento da pressão por maior eficiência e produção. Da mesma forma, a necessidade de biópsia sistemática combinada à dirigida continua a ser uma questão controversa, quando as lesões são visíveis na RM. Revisaremos as atuais diretrizes de VA, os papéis consensualmente aceitos da RM na seleção e monitoramento dos pacientes, potenciais usos, ainda discutíveis, e as limitações do método.

Disforia de género en niños y controversias en su tratamiento: dos concepciones distintas sobre la identidad de género / Disforia de gênero em crianças e controvérsias em seu tratamento: duas concepções diferentes sobre a identidade de gênero / Gender Dysphoria in Children and Controversies about its Treatment: Two Different Conceptions of Gender Identity

Resumen La disforia de género es una marcada incongruencia entre el sexo que se siente o expresa y el que se asigna al nacer, asociada a un malestar clínicamente significativo o deterioro en lo social, que puede darse en niños, adolescentes y adultos. En relación con los pacientes pediátricos, no existe actualmente consenso sobre su tratamiento, así como tampoco evidencia que apoye claramente un enfoque por sobre otro. En la literatura se describen principalmente tres tipos de abordaje en niños preadolescentes: modelo terapéutico, watchful waiting (espera atenta) y modelo afirmativo. En este trabajo se realiza una breve revisión de la literatura existente sobre la disforia de género, se describen los distintos abordajes en niños y se analizan las visiones antropológicas que los sustentan. Plantearemos que existen al menos dos modos de entender la identidad de género, lo que ha dado lugar, en gran medida, a las controversias en los tratamientos propuestos. Por ello, resulta de gran importancia comprender los supuestos antropológicos en que se fundamentan estos modelos, ya que a cada uno de ellos subyacen diferentes maneras de entender la relación sexo-género en la persona y, por tanto, el rol de la corporalidad y de la autoconsciencia en la identidad de género.

Abstract Gender dysphoria is a marked mismatch between the sex felt or expressed by an individual and that assigned to them at birth. It is associated with clinically significant discomfort or social impairment and can occur in children, adolescents, and adults. The literature mainly describes three approaches for preadolescents: therapeutic model, watchful waiting, and gender affirmative model. However, there is currently no consensus on its treatment nor any evidence that favors one approach over another. This paper provides a brief review of the existing literature on gender dysphoria, explains various approaches for children, and discusses the anthropological views behind them. We argue that at least two ways of understanding gender identity have given rise to disagreements over the proposed treatments. It is quite important to comprehend the anthropological assumptions on which these models are based since they underlie different conceptions of the person's sex-gender relationship and, therefore, the role of corporality and self-awareness in gender identity.

Resumo A disforia de gênero é uma marcada incongruência entre o sexo que se sente ou expressa e o que é designado ao nascer, associada a um malestar clinicamente significativo ou a uma deterioração no âmbito social, que pode ocorrer em crianças, adolescentes e adultos. Quanto aos pacientes pediátricos, não existe atualmente consenso em seu tratamento nem evidência que apoie com clareza uma abordagem sobre outro. Na literatura, são descritos três tipos de abordagem em crianças pré-adolescentes: modelo terapêutico, watchful waiting (observação vigilante) e modelo afirmativo. Neste trabalho, é realizada uma breve revisão da literatura sobre a disforia de gênero, são descritas as diferentes abordagens em crianças e são analisadas as visões antropológicas que as justificam. É provável que haja, pelo menos, dois modos de entender a identidade gênero, o que abre espaço a controvérsias nos tratamentos propostos. Por isso, é de grande importância compreender os pressupostos antropológicos nos quais esses modelos estão fundamentados, já que a cada um deles subjazem diferentes maneiras de entender a relação sexo-gênero na pessoa e, portanto, o papel da corporeidade e da autoconsciência na identidade de gênero.

Masas renales pequeñas: predictores de malignidad en una serie de 10 años / Small renal masses: analysis of 152 cases

Background: Small renal masses (SRM) are defined as complex organ-confined solid or cystic lesions < 4 cm. Up to 20% of these can be benign. A conservative management with active surveillance can be done in some patients. However, it is difficult to identify patients with a higher risk of malignancy. Aim: To characterize the clinical, radiological and histopathological aspects of patients with SRM, analyzing predictive factors for tumor aggressiveness. Material and Methods: Retrospective analysis of a cohort of patients undergoing partial or total nephrectomy for renal tumors between 2006 and 2016. All tumors of 4 cm or less were included. Four histological groups were defined: benign, favorable, intermediate and unfavorable. Two categories of risk were also defined: low and high. Preoperative clinical and radiological variables of these patients were analyzed. Results: Data of 152 patients were analyzed. Six percent had a benign histology, and the majority was of intermediate risk (74%). According to histological type, clear cell carcinoma was the most common type (74%). Three percent were benign angiomyolipomas. No malignancy predictive variable was identified. Conclusions: In these patients, the percentage of benign SRM was low. No variable that could predict the presence of a benign or malignant lesion in the definitive biopsy was identified.

Outcomes of clinically localized prostate cancer patients managed with initial monitoring approach versus upfront local treatment: a North American population-based study.

OBJECTIVE: To assess the outcomes of active monitoring (active surveillance or watchful waiting) as an initial management approach compared to upfront definitive local treatments (prostatectomy or radiation therapy) in a cohort of clinically localized prostate cancer patients. METHODS: Patients with clinically localized prostate cancer registered within the Surveillance, Epidemiology and End Results (SEER) watchful waiting database from 2010-2015 were reviewed. Kaplan-Meier analysis was used to compare overall survival outcomes between patients treated with different initial therapeutic approaches. Multivariate Cox regression analysis (stratified by the risk group) was used to assess potential factors affecting prostate cancer-specific survival. RESULTS: Using Kaplan-Meier analysis, prostatectomy was associated with better overall survival compared to radiation therapy and active monitoring (P < 0.001). Multivariate Cox regression analysis was then employed to evaluate different factors affecting prostate cancer-specific survival. Among patients with low-risk disease, the following factors were predictive of better prostate cancer-specific survival: younger age (hazard ratio for patients ≥ 70 years versus patients 40-69 years: 2.081; 95% CI 1.277-3.390; P = 0.003), white race (hazard ratio for black race versus white race: 2.575; 95% CI 1.538-4.311; P < 0.001), non-Hispanic ethnicity (hazard ratio versus Hispanic ethnicity: 0.472; 95% CI 0.244-0.910; P = 0.025), and initial treatment with prostatectomy (hazard ratio for prostatectomy versus active monitoring: 0.551; 95% CI 0.371-0.818; P = 0.003). CONCLUSIONS: Active monitoring seems to be at least as effective as upfront radiation therapy in the management of low-risk disease. Radical prostatectomy is associated with better overall and prostate cancer-specific survival compared to either radiation therapy or active monitoring.

Recent advances in the management of rectal cancer: No surgery, minimal surgery or minimally invasive surgery.

Over the last decade, with the acceptance of the need for improvements in the outcome of patients affected with rectal cancer, there has been a significant increase in the literature regarding treatment options available to patients affected by this disease. That treatment related decisions should be made at a high volume multidisciplinary tumor board, after pre-operative rectal magnetic resonance imaging and the importance of total mesorectal excision (TME) are accepted standard of care. More controversial is the emerging role for watchful waiting rather than radical surgery in complete pathologic responders, which may be appropriate in 20% of patients. Patients with early T1 rectal cancers and favorable pathologic features can be cured with local excision only, with transanal minimal invasive surgery (TAMIS) because of its versatility and almost universal availability of the necessary equipment and skillset in the average laparoscopic surgeon, emerging as the leading option. Recent trials have raised concerns about the oncologic outcomes of the standard "top-down" TME hence transanal TME (TaTME "bottom-up") approach has gained popularity as an alternative. The challenges are many, with a dearth of evidence of the oncologic superiority in the long-term for any given option. However, this review highlights recent advances in the role of chemoradiation only for complete pathologic responders, TAMIS for highly selected early rectal cancer patients and TaTME as options to improve cure rates whilst maintaining quality of life in these patients, while we await the results of further definitive trials being currently conducted.

A Cost-Utility Analysis of 5 Strategies for the Management of Acute Otitis Media in Children.

OBJECTIVE: To assess whether antimicrobial therapy in young children with acute otitis media reduces time to resolution of symptoms, overall symptom burden, and persistence of otoscopic evidence of infection. We used a cost-utility model to evaluate whether immediate antimicrobial treatment seems to be worthwhile, and if so, which antimicrobial agent is most cost effective. STUDY DESIGN: We compared the cost per quality-adjusted life-day of 5 treatment regimens in children younger than 2 years of age with acute otitis media: immediate amoxicillin/clavulanate, immediate amoxicillin, immediate cefdinir, watchful waiting, and delayed prescription (DP) for antibiotic. RESULTS: The 5 treatment regimens, listed in order from least effective to most effective were DP, watchful waiting, immediate cefdinir, immediate amoxicillin, and immediate amoxicillin/clavulanate. Listed in order from least costly to most costly, the regimens were DP, immediate amoxicillin, watchful waiting, immediate amoxicillin/clavulanate, and immediate cefdinir. The incremental cost-utility ratio of immediate amoxicillin compared with DP was $101.07 per quality-adjusted life-day gained. The incremental cost-utility ratio of immediate amoxicillin/clavulanate compared with amoxicillin was $2331.28 per quality-adjusted life-day gained. CONCLUSIONS: In children younger than 2 years of age with acute otitis media and no recent antibiotic exposure, immediate amoxicillin seems to be the most cost-effective initial treatment.

The Efficacy of Multiparametric Magnetic Resonance Imaging and Magnetic Resonance Imaging Targeted Biopsy in Risk Classification for Patients with Prostate Cancer on Active Surveillance.

PURPOSE: We determined whether multiparametric magnetic resonance imaging targeted biopsies may replace systematic biopsies to detect higher grade prostate cancer (Gleason score 7 or greater) and whether biopsy may be avoided based on multiparametric magnetic resonance imaging among men with Gleason 3+3 prostate cancer on active surveillance. MATERIALS AND METHODS: We identified men with previously diagnosed Gleason score 3+3 prostate cancer on active surveillance who underwent multiparametric magnetic resonance imaging and a followup prostate biopsy. Suspicion for higher grade cancer was scored on a standardized 5-point scale. All patients underwent a systematic biopsy. Patients with multiparametric magnetic resonance imaging regions of interest also underwent magnetic resonance imaging targeted biopsy. The detection rate of higher grade cancer was estimated for different multiparametric magnetic resonance imaging scores with the 3 biopsy strategies of systematic, magnetic resonance imaging targeted and combined. RESULTS: Of 206 consecutive men on active surveillance 135 (66%) had a multiparametric magnetic resonance imaging region of interest. Overall, higher grade cancer was detected in 72 (35%) men. A higher multiparametric magnetic resonance imaging score was associated with an increased probability of detecting higher grade cancer (Wilcoxon-type trend test p <0.0001). Magnetic resonance imaging targeted biopsy detected higher grade cancer in 23% of men. Magnetic resonance imaging targeted biopsy alone missed higher grade cancers in 17%, 12% and 10% of patients with multiparametric magnetic resonance imaging scores of 3, 4 and 5, respectively. CONCLUSIONS: Magnetic resonance imaging targeted biopsies increased the detection of higher grade cancer among men on active surveillance compared to systematic biopsy alone. However, a clinically relevant proportion of higher grade cancer was detected using only systematic biopsy. Despite the improved detection of disease progression using magnetic resonance imaging targeted biopsy, systematic biopsy cannot be excluded as part of surveillance for men with low risk prostate cancer.

Active surveillance of renal masses: an analysis of growth kinetics and clinical outcomes stratified by radiological characteristics at diagnosis

AIMS To determine the growth rate of renal masses (RMs) under active surveillance (AS), and to describe the clinical outcome of AS patients. Materials and Methods We conducted a retrospective review of an AS database to obtain demographics, radiological and pathologic characteristics and RM size of patients. RMs were followed at 6-12 month intervals for ≥1 year with computed tomography (CT), magnetic resonance imaging (MRI), or renal ultrasound. Kaplan-Meier analysis determined the annual likelihood of intervention. RMs were divided into 3 radiographic subcategories (solid, cystic, and angiomyolipoma). A linear regression model determined RM growth rates. Results 131 RMs in 114 patients were included. Median age, Charlson Comorbidity Index score and mean follow-up were 69.1 years, 4.0 and 4.2±2.6 years, respectively. Maximal tumor diameter (MTD) at diagnosis was 2.1±1.3 cm. 49 RMs exhibited negative or zero net growth. Mean MTD growth rate for all RMs was 0.72±3.2 (95% CI: 0.16-1.28) mm/year. When stratified by MTD at diagnosis, mean RM growth rates were 0.84, 0.84, 0.44, 0.74 and 0.71 mm/year for RMs <1 cm, 1-<2cm, 2-<3cm, 3-<4cm and ≥4cm, respectively (p<0.01). The 5 and 10-year freedom from intervention rates were 93.1% and 88.5%, respectively. There was a single case of suspected metastases, but no deaths related to kidney cancer. Conclusions RMs under AS grew slowly, and had a low incidence of requiring surgical intervention and progression. Solid enhancing masses grew slowly, and were more likely to trigger intervention. AS should be considered for selected patients with small RMs. .