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Search Results: 1 - 10 of 17854 matches for " Mark Ritenour "
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Use of carnauba based carrier for copper sprays reduces infection by Xanthomonas citri subsp. citri and Diaporthe citri in Florida commercial grapefruit groves  [PDF]
Jan Narciso, Wilbur Widmer, Christopher Ference, Mark Ritenour, Ricardo Diaz
Agricultural Sciences (AS) , 2012, DOI: 10.4236/as.2012.37117
Abstract: Citrus canker, caused by Xanthomonas citri subsp. citri (Xcc), is a bacterial disease of citrus and results in peel blemishes rendering fresh fruit unsalable. Xcc is most active in warm, wet Florida summers where tissues are infected during periods of active growth. Melanose, caused by Diaporthe citri, is common in citrus producing countries, but, like canker, is only important for fresh market fruit. To control canker and melanose, Florida growers spray trees with copper formulations (Cu), but these sprays are removed by strong rains and intense radiation of Florida summers. A study was undertaken in FL commercial grapefruit groves in 2009 and 2010 to assess the efficiency of a spray combining copper with a specially formulated, hydrating wax (WashGard?) (WG). Using a 21-day spray schedule for the season, fruit were sprayed with WG + Cu, Cu and Control (no spray). Fruit from trees sprayed with WG + Cu had approximately 10 and17% more canker free fruit in 2009 and 2010 respectively compared to trees sprayed with copper alone. Compared to control trees the canker free fruit incidence was increased by ≈10% in 2009 and 57% in 2010. For melanose there was 40% more disease free fruit (treated) over fruit from trees with no treatment in 2009 and approximately 20% more in 2010. Controlling infection with this spray significantly reduces citrus canker and melanose, increasing the percentage of marketable fruit.
Scrotal Abscess as Initial Presentation of Squamous Cell Carcinoma
Kathy H. Huen,Paymon Nourparvar,John J. DeCaro,Mark D. Walsh,Muta M. Issa,Chad W. M. Ritenour
Case Reports in Urology , 2013, DOI: 10.1155/2013/807346
Abstract: We report a case of scrotal squamous cell carcinoma in a 67-year-old man that presented as a recurrent nonhealing scrotal abscess. Radical scrotectomy and bilateral simple orchiectomy were performed. A pudendal thigh flap was used for wound closure. To our knowledge, this is the first report of its use after radical surgery for scrotal cancer. The clinical features, staging, and treatment of scrotal squamous cell carcinoma are reviewed. In this report, we highlight the importance of including scrotal cancer in the differential diagnosis when evaluating a scrotal abscess. 1. Introduction Squamous cell carcinoma (SCC) of the scrotum is a rare neoplasm, with an incidence rate of 0.95/1 million [1]. In 1775, Pott reported greater scrotal cancer rates in chimney sweepers, the first description of an occupationally related cancer. It has subsequently been associated with exposure to tar, arsenic, paraffin, shale oil, petroleum wax, sun exposure, and human papillomavirus [2]. Currently, most cases are thought to result from poor hygiene and chronic inflammation [3]. SCC of the scrotum is most frequently diagnosed in the sixth and seventh decades. It typically presents as a solitary, painless, and slow-growing nodule. Ulceration may follow with an increase in lesion size, and the area can become infected [3]. In this report, we emphasize the importance of including scrotal cancer in the differential diagnosis when evaluating a scrotal abscess despite the lack of risk factors. We also describe the first reported use of a pudendal thigh flap for perineal wound closure after radical surgery for treatment of scrotal cancer. 2. Case Report A 67-year-old man initially presented eight years ago for evaluation at an outside facility for a scrotal mass and purulent drainage. He was diagnosed with a scrotal abscess and incision and drainage was performed. The wound healed poorly, and the lesion recurred. In the subsequent years, he underwent scrotal exploration and two additional incisions and drainages for presumed recurrent abscesses. Twelve months prior to referral to our clinic, the scrotal lesion had been slowly enlarging and was draining foul-smelling, purulent discharge. He had lost 25 pounds in the preceding six months. He had no prior exposure history or occupational risk factors for scrotal cancer. On examination, testes were palpable, but they were obscured by an irregular-appearing, ulcerating, fungating mass that distorted normal anatomy (Figure 1). Multiple firm, mobile, and enlarged inguinal lymph nodes were palpable bilaterally, with the largest measuring
The Utilization of Gleason Grade as the Primary Criterion for Ordering Nuclear Bone Scan in Newly Diagnosed Prostate Cancer Patients
Chad W. M. Ritenour,John T. Abbott,Michael Goodman,Naomi Alazraki
The Scientific World Journal , 2009, DOI: 10.1100/tsw.2009.113
Abstract:
Breakage of Needle during Intracavernosal Injection and Use of Portable Ultrasound Guidance for Removal
Wayland Hsiao,Fei Lian,Brooks Goodgame,Chad W. M. Ritenour,Jordan Angell,Viraj A. Master
Case Reports in Urology , 2013, DOI: 10.1155/2013/215492
Abstract: Purpose. Intracavernosal self-injection (ICI) was first described in 1982, and remains a viable therapy for erectile dysfunction. However, intracorporal needle breakage can be a rare complication of therapy. We report a rare complication of intracorporal needle breakage and a retention of a 30-gauge needle in a 42-year-old paraplegic man. We discuss our experience in using portable high-frequency ultrasound intraoperatively to visualize and guide removal of a retained ICI needle. Materials and Methods. Review of case and ultrasound technique are presented. Results. Using intraoperative ultrasound imaging, the retained intracorporal needle was successfully removed from the patient's penis without any complications. Follow-up ultrasonography and X-ray confirmed complete removal of the needle. Conclusions. We report on the successful implementation and use of a portable high-frequency ultrasound probe to visualize a retained intracorporal needle inside the penis and its use to guide removal. Given the rapid proliferation of portable ultrasound machines in the operating room and out in the field, we expect these imaging techniques to become routine, especially in urological emergencies. 1. Introduction Intracavernosal injection (ICI) therapy was introduced in 1982, and today it remains a viable second-line therapy for erectile dysfunction with high satisfaction reported in patients who remain on ICI [1, 2]. Complications of ICI may include penile burning, priapism, and ecchymosis [3]. Herein, we describe an uncommon complication of ICI therapy, namely, breakage of the ICI needle and lodgment of needle in the corpus cavernosum itself [4–6]. We further describe the novel use of bedside ultrasound visualization to localize the needle to guide removal. 2. Materials and Methods The patient was a 42-year-old African-American male paraplegic with a history of transverse myelitis. He had been successfully treated with ICI for a number of years. While performing an injection early one morning, a large section of the 30-gauge needle broke at the hub, remaining lodged in the penis. The patient attempted to remove it himself at home by making a small incision over the injection site but was unable to do so. He presented to the Emergency Department without any gross hematuria. A pelvic X-ray revealed a 30-gauge needle in the penis (Figure 1(a)). On physical exam, the needle was not immediately palpable, although deep palpation was not attempted secondary to risk of needle-stick exposure. Other laboratory values were within normal limits. Figure 1: (a) Use of digital
Pelvic Nephroureterectomy for Renal Cell Carcinoma in an Ectopic Kidney
Kevin G. Baldie,Usama A. Al-Qassab,Chad W. Ritenour,Muta M. Issa,Adeboye O. Osunkoya,John A. Petros
Case Reports in Oncological Medicine , 2012, DOI: 10.1155/2012/350916
Abstract: We present a case of an ectopic renal tumor in a 61-year-old morbidly obese man with a pelvic kidney found after presenting with hematuria and irritative voiding symptoms. The mass, along with the ectopic kidney and ureter, was radically resected through an open operation that involved removing both them and the renal vessels from the underlying iliac vessels. Pathological analysis demonstrated an 8.3 cm papillary renal cell carcinoma (RCC) with oncocytic features, Fuhrman nuclear grade 3, with angiolymphatic invasion and negative margins. The patient has been recurrence-free for over four years since tumor resection.
Pelvic Nephroureterectomy for Renal Cell Carcinoma in an Ectopic Kidney
Kevin G. Baldie,Usama A. Al-Qassab,Chad W. Ritenour,Muta M. Issa,Adeboye O. Osunkoya,John A. Petros
Case Reports in Oncological Medicine , 2012, DOI: 10.1155/2012/350916
Abstract: We present a case of an ectopic renal tumor in a 61-year-old morbidly obese man with a pelvic kidney found after presenting with hematuria and irritative voiding symptoms. The mass, along with the ectopic kidney and ureter, was radically resected through an open operation that involved removing both them and the renal vessels from the underlying iliac vessels. Pathological analysis demonstrated an 8.3?cm papillary renal cell carcinoma (RCC) with oncocytic features, Fuhrman nuclear grade 3, with angiolymphatic invasion and negative margins. The patient has been recurrence-free for over four years since tumor resection. 1. Introduction Renal ectopia is a rare condition involving a failure of the mature kidney to reach its normal location within the renal fossa. This congenital anomaly comprises about 0.001% of all autopsies. Pelvic, iliac, abdominal, thoracic, contralateral, and crossed ectopic kidneys can occur. Apart from the development of hydronephrosis and urolithiasis, the ectopic kidney is no more susceptible to disease than the normally positioned kidney [1]. Nevertheless, when considering surgical resection, particularly with the intent to remove a tumor, an accurate understanding of the surrounding anatomy is crucial in order to avoid causing both unnecessary damage to blood vessels and leaving remnants of tumor within the patient. 2. Case Report The patient presented as a 61 year old morbidly obese male with a history of chronic kidney disease describing three months of gross, painless hematuria and irritative lower urinary tract symptoms. The remainder of the review of systems was unremarkable. He initially went to an outside hospital after his symptoms were refractory to antibiotic management where he was found on noncontrast CT to have a large left renal mass arising from an ectopic pelvic kidney. Mercaptoacetyltriglycine-3 (MAG3) renography was performed at our institution following referral, showing an essentially nonfunctional left kidney and delayed perfusion, uptake, and excretion in the contralateral kidney. Two weeks later, the patient was further worked up with a complete history and physical, labs, and abdominal MRI with and without contrast. Physical exam and labs were unremarkable except for a creatinine of 2.2. MRI showed an 8.6?cm centrally necrotic, peripherally enhancing solid mass in the superior-interpolar region of the ectopic left kidney worrisome for renal malignancy. The superior margin of the mass rested anterior to the left common iliac vessels (Figure 1). Two anomalous renal arteries supplied the kidney, with the
The Mind’s Irreducible Structure  [PDF]
Mark Simes
Sociology Mind (SM) , 2012, DOI: 10.4236/sm.2012.23033
Abstract: The human mind is one of our most compelling subjects of scientific inquiry—and perhaps our most elusive. Despite impressive biological advances, neuroscience has yet to produce a logical and empirical analysis of the mind that exhibits universal, objective explanatory power of human mental phenomena on both an individual and species level. This article first explores the limitations of the current neuroscientific approach to the human mind and then argues for a reconceptualization of the relationship between human mental phenomena and the brain. Here I introduce a new interpretation of neuroscientific data and argue that this framework has the capacity to causally explain the link between social, psychological and biological levels of analysis.
Why Asynchronous Computer-Mediated Communication (ACMC) Is a Powerful Tool for Language Learning  [PDF]
Mark Brooke
Open Journal of Modern Linguistics (OJML) , 2012, DOI: 10.4236/ojml.2012.23016
Abstract: Tertiary institutions are increasingly using online virtual environments such as Blackboard to upload course content for students. However, there is still limited usage of the online blogging and discussion tools. This study describes the language used by tertiary students involved in blogging and discussions online. It also demonstrates learning processes observed through the interactions of participants over time. Findings suggest that this unique discourse mode is a potentially powerful tool for language learning.
Enhancing Pre-Service Teacher Training: The Construction and Application of a Model for Developing Teacher Reflective Practice Online  [PDF]
Mark Brooke
Open Journal of Modern Linguistics (OJML) , 2012, DOI: 10.4236/ojml.2012.24023
Abstract: Reflective practice is an essential component of pre-service teacher training programs. It facilitates the linking of theory and practice and empowers trainees to seek reasons behind their practices and their beliefs. These help novices to evolve as they witness their own teaching philosophies emerging. This research took place over 18 months and comprised 3 case studies of eight weeks with 3rd year ESOL trainees on their first intensive block practice in Hong Kong state schools. The research suggests that an online environment is an effective one in supporting and developing reflective practice during these periods. This was facilitated by asking trainees to apply an online model to scaffold reflections. These reflections were then posted and discussed by all case study members. They were also explored further using online moderator asynchronous Socratic dialogue to prompt further reflection. Findings demonstrate that a deep level of reflection is attainable in this context, albeit relatively rare, using the online medium.
A Critical Analysis of Selected Policy Making Decisions in the US and the UK with Regard to the Implementation of Information and Communication Technology (ICT) in National State Primary and Secondary School Education Systems  [PDF]
Mark Brooke
Open Journal of Modern Linguistics (OJML) , 2013, DOI: 10.4236/ojml.2013.31012
Abstract: Information and Communication Technology has played an important and pervasive role in modern business and everyday living over the last decade and more. The industry accounts for trillions of annual revenue. Yet, it has proved hard for a similar role for Information and Communication Technology (ICT) to emerge in education. In this paper, I will argue that policy regarding ICT use at national state levels in the UK and the US has striven to create, and continues to perpetuate, a system of education with technological divisions of labour, and marginalized innovative and communicative practical uses of technology for enhancing education in schools.
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