Publications by authors named "Christopher Tallman"

Purpose: To synthesize the evidence from randomized controlled trials of prostatic urethral lift (PUL) and convective water vapor thermal energy therapy (WAVE) for minimally invasive treatment of men with benign prostatic hyperplasia.

Methods: A systematic search of databases was performed to identify trials comparing WAVE or PUL to either an active or sham surgery control in subjects with symptomatic benign prostatic obstruction. A controlled indirect treatment comparison based on the approach of Bucher was performed for outcomes including International Prostate Symptom Score and maximum urinary flow rate (Qmax).

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Objectives: Complex bladder dysfunction requires urodynamic testing, often under fluoroscopy termed videourodynamic study (VUDS), to assist the diagnosis and management. Videourodynamic study is an objective tool with high interrater reliability (IRR) for identifying detrusor overactivity. However, IRR has not been validated with disorders associated with neurogenic bladder (NGB).

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Robot-assisted radical cystectomy (RARC) is increasingly being used to treat muscle-invasive bladder cancer in an attempt to improve functional outcomes and complication rates over open radical cystectomy (ORC). We performed a meta-analysis of randomized controlled trials (RCTs) to compare patient outcomes between RARC and ORC. The primary outcome measure was a composite of recurrence-free survival (RFS) or progression-free survival (PFS).

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Between September and December 2017, 82 men with moderate-to-severe lower urinary tract symptoms due to benign prostatic hyperplasia LUTS/BPH and prostate volume of 80-150 cc underwent Aquablation in a prospective multicenter clinical trial in the United States. Baseline patient and clinical demographics and standardized postoperative parameters were collected and tabulated in a central independently monitored database. Adverse events through 3 months were adjudicated by an independent clinical events committee.

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Purpose: We report a 1-year update of functional urinary and sexual recovery, oncologic outcomes and postoperative complications in patients who completed a randomized controlled trial comparing posterior (Retzius sparing) with anterior robot-assisted radical prostatectomy.

Materials And Methods: A total of 120 patients with clinically low-intermediate risk prostate cancer were randomized to undergo robot-assisted radical prostatectomy via the posterior and anterior approach in 60 each. Surgery was performed by a single surgical team at an academic institution.

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Objective: To evaluate health-related quality of life (HRQL) using validated bladder-specific Bladder Cancer Index (BCI) and European Organization for Research and Treatment of Cancer Body Image scale (BIS) between open radical cystectomy (ORC) and robot-assisted radical cystectomy (RARC).

Methods: This was a retrospective case series of all patients who underwent radical cystectomy. Patients were grouped based on surgical approach (open vs robot assisted) and diversion technique (extracorporeal vs intracorporeal).

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Objectives: To better understand the risk of short-term complications associated with perioperative intravesical mitomycin-C (MMC) therapy for patients undergoing endoscopic management of non-muscle invasive bladder cancer.

Methods And Materials: Using an institutional database of patients with bladder cancer, we performed a retrospective case-control study of patients receiving perioperative MMC after tumor resection (2008-2012). MMC cases were matched by clinical stage to controls receiving endoscopic resection alone.

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Objective: To evaluate our initial robotic-assisted radical cystectomy (RARC) experience compared with a robust open radical cystectomy (ORC) series performed at a single institution using a matched-pair analysis. Although early results suggest that RARC is safe, with favorable perioperative and early oncologic outcomes, limited data exist comparing ORC and RARC.

Methods: RARC and ORC patients were identified through a prospectively maintained institutional review board-approved bladder cancer database.

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Although alterations in xenobiotic metabolism are considered causal in the development of bladder cancer, the precise mechanisms involved are poorly understood. In this study, we used high-throughput mass spectrometry to measure over 2,000 compounds in 58 clinical specimens, identifying 35 metabolites which exhibited significant changes in bladder cancer. This metabolic signature distinguished both normal and benign bladder from bladder cancer.

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Background: Cystectomy delay >90 days after a diagnosis of muscle-invasive bladder cancer (MIBC) adversely affects pathologic stage and survival outcomes in patients who undergo primary surgery. After neoadjuvant chemotherapy (NAC), the impact of the timing of cystectomy delivery on these outcomes is uncertain. Poor communication between urologic and medical oncologists can result in cystectomy delay after systemic treatment.

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Objectives: The purpose of the current review was to evaluate the long-term outcomes of intravesical therapy for non-muscle invasive bladder cancer.

Methods: A literature search was performed to identify studies documenting long-term outcomes of intravesical therapy for non-muscle invasive bladder cancer. Data from each study were collected using standardized forms that included information on author, date of study, journal, study type, intravesical therapy used, number of patients, length of follow-up, and outcome measures (recurrence, progression, and disease-specific and overall mortality).

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Prostaglandin E2, which is known to contribute to cancer progression, is inactivated by the catabolic enzyme, 15-hydroxyprostaglandin dehydrogenase (PGDH), which has tumor-suppressor activity in lung, colon, breast, and gastric cancers. Therefore, we evaluated the expression of PGDH in human bladder cancer tissue specimens and cell lines. Immunoperoxidase staining of bladder cancer tissues demonstrated that (1) PGDH is highly expressed by normal urothelial cells but (2) reduced in many low stage (Ta/Tis) bladder cancers, and (3) PGDH is completely lost in most invasive bladder cancers.

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Overactive bladder (OAB) is a prevalent condition in both men and women that imposes significant burdens on the patient and his or her quality of life. Nevertheless, only a small percentage of patients with OAB receive diagnosis and treatment. The identification of OAB is well within the scope of the primary care provider, as it is symptom-based and does not generally require specialized testing.

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