Peter N. Kolettis

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PURPOSE Because varicocele is seen often in infertile men and oxidative stress has been implicated in sperm dysfunction, we assessed spermatozoal reactive oxygen species and seminal total antioxidant capacity in men with and without varicocele. MATERIALS AND METHODS Levels of reactive oxygen species and total antioxidant capacity were measured in the(More)
PURPOSE We compared vasoepididymostomy to microsurgical epididymal sperm aspiration and intracytoplasmic sperm injection for treatment of epididymal obstruction secondary to vasectomy. MATERIALS AND METHODS Results in patients who underwent vasoepididymostomy for vasectomy reversal at our institution were compared to those reported previously for(More)
OBJECTIVE To evaluate seminal oxidative stress in men after vasectomy reversal and to determine whether seminal oxidative stress could predict fertility after vasectomy reversal. DESIGN Measurement of seminal reactive oxygen species (ROS) and total antioxidant capacity (TAC) in normal donors, men who were fertile after vasectomy reversal, and men who were(More)
PURPOSE Cystic ectasia of the rete testis is a rare condition that may be incidentally noted on scrotal ultrasonography. This benign condition has a typical appearance of a collection of small anechoic structures in the confluence of the mediastinum testis. The main significance of this condition is that it must be differentiated from testicular neoplasm.(More)
PURPOSE We reviewed our experience with percutaneous nephrolithotomy (PCNL) in patients with renal allografts over 19 years. MATERIALS AND METHODS We cross-referenced all renal allograft recipients at our institution with all PCNLs performed. We identified 16 renal allograft recipients who underwent a total of 21 PCNL procedures between 1986 and 2005.(More)
OBJECTIVES To review a large experience with sperm cryopreservation in patients with testicular cancer and determine the effect of clinical stage and tumor histologic features on semen quality. METHODS The prefreeze and post-thaw sperm quality of 157 patients with testicular cancer was compared with that of 50 normal donors. The impact of tumor stage and(More)
Infertility affects 15 percent of couples, and 50 percent of male infertility is potentially correctable. Evaluation of the subfertile man requires a complete medical history, physical examination, and laboratory studies. The main purpose of the male evaluation is to identify and treat correctable causes of subfertility. In addition, many men seek an(More)
PURPOSE We compared the exclusion rate for potential living renal donors evaluated with computerized tomography angiography and radionuclide renal scintigraphy (renal scan) vs excretory urogram, renal scan and renal arteriography. MATERIALS AND METHODS From March 2004 through February 2006, 603 consecutive patients were evaluated as potential living renal(More)
OBJECTIVE To investigate whether genetic modifiers of cystic fibrosis (CF) lung disease also predispose to congenital bilateral absence of the vas deferens (CBAVD) in association with cystic fibrosis transmembrane conductance regulator (CFTR) mutations. We tested the hypothesis that polymorphisms of transforming growth factor (TGF)-β1 (rs 1982073, rs(More)
OBJECTIVES To review the clinical and genetic findings in men with congenital unilateral absence of the vas deferens (CUAVD). CUAVD is important because of its association with renal anomalies and cystic fibrosis transmembrane conductance regulator gene mutations. METHODS A retrospective review of two urologic practices, both with subspecialty interest in(More)