Publications by authors named "Frederik Roos"

Objectives: To test for differences in overall and recurrence-free survival between laparoscopic and open surgical approaches in patients undergoing radical nephroureterectomy (RNU) for upper tract urothelial carcinoma (UTUC).

Materials And Methods: We retrospectively identified patients treated for UTUC from 2010 to 2020 from our institutional database. Patients undergoing laparoscopic or open RNU with no suspicion of metastasis (cM0) were for the current study population.

View Article and Find Full Text PDF

Introduction: Growth arrest-specific protein 6 (Gas 6) is a ligand that plays a role in proliferation and migration of cells. For several tumor entities, high levels of Gas 6 are associated with poorer survival. We examined the prognostic role of Gas 6 in renal cell carcinoma (RCC), especially in papillary RCC (pRCC), which is still unclear.

View Article and Find Full Text PDF

Background: Only one previously published study by Nocera et al. addressed the risk of upstaging to ≥pT3 in cT1 clear cell renal cell carcinoma (ccRCC) by using characteristics of the R.E.

View Article and Find Full Text PDF

Background: Nectin-4 contributes to tumor proliferation, lymphangiogenesis and angiogenesis in malignant tumors and is an emerging target in tumor therapy. In renal cell carcinoma (RCC) VEGF-directed tyrosine kinase inhibitors and checkpoint inhibitors are currently treatments of choice. Enfortumab vedotin-ejf (EV) is an antibody drug conjugate that targets Nectin-4.

View Article and Find Full Text PDF

Introduction: Programmed death-1 ligand (PD-L1) has been often studied in different types of renal-cell carcinoma (RCC). For example, in clear-cell renal carcinoma it is well established that programmed death-1 receptor and PD-L1 are important prognostic markers. In contrast, the role of programmed death-2 ligand (PD-L2) as prognostic marker remains unclear.

View Article and Find Full Text PDF

Background: We aimed to determine the concordance between the radiologic stage (rT), using multiparametric magnetic resonance imaging (mpMRI), and pathologic stage (pT) in patients with high-risk prostate cancer and its influence on nerve-sparing surgery compared to the use of the intraoperative frozen section technique (IFST).

Methods: The concordance between rT and pT and the rates of nerve-sparing surgery and positive surgical margin were assessed for patients with high-risk prostate cancer who underwent radical prostatectomy.

Results: The concordance between the rT and pT stages was shown in 66.

View Article and Find Full Text PDF

Prostate specific membrane antigen (PSMA) is an emerging diagnostic and therapeutic target in prostate cancer. Ga-PSMA-labeled hybrid imaging is used for the detection of prostate primary tumors and metastases. Therapeutic applications such as Lutetium-177 PSMA radionuclide therapy or bispecific antibodies that target PSMA are currently under investigation within clinical trials.

View Article and Find Full Text PDF

Background: Claudins are promising biomarkers for diagnosis and prognosis or targets for treatment. They play a major role in signal transduction and are important in nearly all aspects of tumorigenesis. Claudin 6 is a member of the claudin family and is part of the tight junction molecule.

View Article and Find Full Text PDF
Article Synopsis
  • The tyrosine-protein kinase c-Met is a proto-oncogene implicated in tumor aggressiveness, but its role as a prognostic factor in papillary RCC (pRCC) remains unclear.
  • In a study involving patients with type 1 and 2 pRCC, cMET expression was evaluated, revealing no significant differences in five-year overall survival rates based on cMET positivity.
  • However, subgroup analyses indicated that cMET expression was associated with T stage and metastasis specifically in type 2 pRCC, where cMET-positive patients had a higher rate of metastases.
View Article and Find Full Text PDF

Objective: To test 1) contemporary pelvic lymph node dissection (PLND) trends at radical cystectomy (RC) in variant histology bladder cancer (VHBC) patients and urothelial carcinoma of the urinary bladder (UCUB), as well as 2) to test the effect of PLND extent on cancer specific mortality (CSM) after RC.

Methods: Within the Surveillance, Epidemiology and End Results Registry (SEER, 2004-2016), we identified non-metastatic stage T or T VHBC and UCUB patients, who underwent RC. CSM and lymph node invasion (LNI) rates were stratified according to PLND extent, as well as coded continuously in multivariate Cox and logistic regression models.

View Article and Find Full Text PDF

Background: This study aims to test the effect of the 10 most common nonurological primary cancers (skin, rectal, colon, lymphoma, leukemia, pancreas, stomach, esophagus, liver, lung) on overall mortality (OM) after secondary prostate cancer (PCa).

Material And Methods: Within the Surveillance, Epidemiology, and End Results (SEER) database, patients with 10 most common primary cancers and concomitant secondary PCa (diagnosed 2004-2016) were identified and were matched in 1:4 fashion (age, year at diagnosis, race/ethnicity, treatment type, TNM stage) with primary PCa controls. OM was compared between secondary and primary PCa patients and was stratified according to primary cancer type, as well as according to time interval between primary cancer secondary PCa diagnoses.

View Article and Find Full Text PDF

Background: The survival benefit of primary external beam radiation therapy (EBRT) has never been formally tested in elderly men who were newly diagnosed with metastatic prostate cancer (mPCa). We hypothesized that elderly patients may not benefit of EBRT to the extent as younger newly diagnosed mPCa patients, due to shorter life expectancy.

Methods: We relied on Surveillance, Epidemiology and End Results (2004-2016) to identify elderly newly diagnosed mPCa patients, aged >75 years.

View Article and Find Full Text PDF

Purpose: This study aimed to evaluate the impact of preoperative double-J stent (DJ) in pyeloplasty patients on perioperative complications, recurrence, and quality of life (QoL).

Methods: Pyeloplasties due to ureteropelvic junction obstructions between January 2010 and December 2020 were consecutively identified. A standardized follow-up questionnaire was used.

View Article and Find Full Text PDF

Purpose: To compare Cancer-specific mortality (CSM) in patients with Squamous cell carcinoma (SCC) vs. non-SCC penile cancer, since survival outcomes may differ between histological subtypes.

Methods: Within the Surveillance, Epidemiology and End Results database (2004-2016), penile cancer patients of all stages were identified.

View Article and Find Full Text PDF

Background: To test the effect of urological primary cancers (bladder, kidney, testis, upper tract, penile, urethral) on overall mortality (OM) after secondary prostate cancer (PCa).

Methods: Within the Surveillance, Epidemiology and End Results (SEER) database, patients with urological primary cancers and concomitant secondary PCa (diagnosed 2004-2016) were identified and were matched in 1:4 fashion with primary PCa controls. OM was compared between secondary and primary PCa patients and stratified according to primary urological cancer type, as well as to time interval between primary urological cancer versus secondary PCa diagnoses.

View Article and Find Full Text PDF

Objective: We aimed to assess the correlation between serum prostate-specific antigen (PSA) and tumor burden in prostate cancer (PCa) patients undergoing radical prostatectomy (RP), because estimation of tumor burden is of high value, e.g., in men undergoing RP or with biochemical recurrence after RP.

View Article and Find Full Text PDF

Background: The efficacy of tyrosine kinase inhibitor (TKI)-based therapy after previous immuno-oncology therapy (IO) failure has been addressed before. However, summary efficacy estimates have never been generated in these reports. We addressed this void.

View Article and Find Full Text PDF

Background: Number of positive prostate biopsy cores represents a key determinant between high versus very high-risk prostate cancer (PCa). We performed a critical appraisal of the association between the number of positive prostate biopsy cores and CSM in high versus very high-risk PCa.

Methods: Within Surveillance, Epidemiology, and End Results database (2010-2016), 13,836 high versus 20,359 very high-risk PCa patients were identified.

View Article and Find Full Text PDF

There is an unmet need for predictive biomarkers in metastatic renal cell carcinoma (mRCC) therapy. The phase IV MARC-2 trial searched for predictive blood biomarkers in patients with predominant clear cell mRCC who benefit from second-line treatment with everolimus. In an exploratory approach, potential biomarkers were assessed employing proteomics, ELISA, and polymorphism analyses.

View Article and Find Full Text PDF

Background: Controversy still exists regarding efficacy of multimodality treatment (MMT) vs. radical cystectomy (RC) for urothelial carcinoma of the urinary bladder (UCUB).

Methods: Within the SEER database (2004-2016), we retrospectively identified patients with stage T2N0M0 UCUB.

View Article and Find Full Text PDF

Background: Previous cancer-specific mortality (CSM) analyses for different Gleason patterns in Gleason grade group (GGG) 5 cancer were limited by sample size.

Objective: To test for differences in CSM according to biopsy GG 5 patterns (4 + 5 vs 5 + 4 vs 5 + 5) among patients undergoing radical prostatectomy (RP) or external beam radiation therapy (EBRT).

Design, Setting, And Participants: Patients in the Surveillance, Epidemiology and End Results database treated with RP and EBRT (2004-2016) were identified and stratified according to Gleason 4 + 5 versus 5 + 4 versus 5 + 5.

View Article and Find Full Text PDF
Article Synopsis
  • Disorder of sex development (DSD) involves atypical chromosomal, gonadal, or anatomical sex development, classified by karyotype and genital appearance.
  • A case is presented of a 41-year-old patient with 46,XX DSD who had an ovotestis and a concurrent Leydig cell tumor diagnosed after MRI indicated a suspicious testicular lesion.
  • This case highlights that while 46,XX DSD generally has a low risk for germ cell tumors, there is still a possibility for rare nongerm cell tumors, emphasizing the need for careful management and monitoring in these patients.
View Article and Find Full Text PDF

Context: Novel prospective randomized controlled observations addressing combination therapy in metastatic hormone-sensitive prostate cancer (mHSPC) have demonstrated promising overall survival (OS) outcomes.

Objective: To compare these novel findings and systematically review and address them within formal network meta-analyses (NMAs) that include observations from other prospective randomized controlled trials (RCTs).

Evidence Acquisition: First, we focused on abiraterone, enzalutamide, apalutamide, and docetaxel effects on OS in mHSPC using the PRISMA methodology.

View Article and Find Full Text PDF

To investigate temporal trends in prostate cancer (PCa) radical prostatectomy (RP) candidates. Patients who underwent RP for PCa between January 2014 and December 2019 were identified form our institutional database. Trend analysis and logistic regression models assessed RP trends after stratification of PCa patients according to D'Amico classification and Gleason score.

View Article and Find Full Text PDF