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Objectives/Hypothesis: To report two patients with a history of microvascular decompression (MVD) for hemifacial spasm who presented with Teflon granulomas (TG) mimicking cerebellopontine angle (CPA) tumors and to perform a systematic review of the English-language literature. Study Design: Case series at a single tertiary academic referral center and systematic review. Methods: Retrospective chart review with analysis of clinical, radiological, and histopathological findings. Systematic review using PubMed, Embase, MEDLINE, and Web of Science databases. Results: Two patients with large skull base TGs mimicking CPA tumors clinically and radiographically were managed at the authors' institution. The first presented 4 years after MVD with asymmetrical sensorineural hearing loss, multiple progressive cranial neuropathies, and brainstem edema due to a growing TG. Reoperation with resection of the granuloma confirmed a foreign-body reaction consisting of multinucleated giant cells containing intracytoplasmic Teflon particles. The second patient presented 11 years after MVD with asymmetrical sensorineural hearing loss and recurrent hemifacial spasm. No growth was noted over 2 years, and the patient has been managed expectantly. Only one prior case of TG after MVD for hemifacial spasm has been reported in the English literature. Conclusions: TG is a rare complication of MVD for hemifacial spasm. The diagnosis should be suspected in patients presenting with a new-onset enhancing mass of the CPA after MVD, even when performed decades earlier. A thorough clinical and surgical history is critical toward establishing an accurate diagnosis to guide management and prevent unnecessary morbidity. Surgical intervention is not required unless progressive neurologic complications ensue. © 2016 The American Laryngological, Rhinological and Otological Society, Inc.


Andreasson B.,Internal Medicine | Kosiorek H.E.,Section of BiostatisticsMayo ClinicScottsdale | Dueck A.C.,Section of BiostatisticsMayo ClinicScottsdale | Martin K.A.,Arizona | And 7 more authors.
Cancer | Year: 2016

BACKGROUND: Patients with myeloproliferative neoplasms (MPNs) including polycythemia vera, essential thrombocythemia, and myelofibrosis, are faced with oppressive symptom profiles that compromise daily functioning and quality of life. Among these symptoms, sexuality-related symptoms have emerged as particularly prominent and largely unaddressed. In the current study, the authors evaluated how sexuality symptoms from MPN relate to other patient characteristics, disease features, treatments, and symptoms. METHODS: A total of 1971 patients with MPN (827 with essential thrombocythemia, 682 with polycythemia vera, 456 with myelofibrosis, and 6 classified as other) were prospectively evaluated and patient responses to the Myeloproliferative Neoplasm Symptom Assessment Form (MPN-SAF) and the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC-QLQ C30) were collected, along with information regarding individual disease characteristics and laboratory data. Sexuality scores were compared with an age-matched, healthy control population. RESULTS: Overall, patients with MPN were found to have greater sexual dysfunction compared with the healthy population (MPN-SAF score of 3.6 vs 2.0; P<.001), with 64% of patients with MPN describing some degree of sexual dysfunction and 43% experiencing severe symptoms. The presence of sexual symptoms correlated closely with all domains of patient functionality (physical, social, cognitive, emotional, and role functioning) and were associated with a reduced quality of life. Sexual problems also were found to be associated with other MPN symptoms, particularly depression and nocturnal and microvascular-related symptoms. Sexual dysfunction was more severe in patients aged >65 years and in those with cytopenias and transfusion requirements, and those receiving certain therapies such as immunomodulators or steroids. Conclusions: The results of the current study identify the topic of sexuality as a prominent issue for the MPN population, and this area would appear to benefit from additional investigation and management. © 2016 American Cancer Society.


Abbas A.E.,Cardiovascular Systems | Franey L.M.,Cardiovascular Systems | Lester S.,Arizona | Raff G.,Cardiovascular Systems | And 4 more authors.
Echocardiography | Year: 2014

In patients with aortic stenosis (AS) and eccentric transaortic flow, greater pressure loss occurs as the jet collides with the aortic wall together with delayed and diminished pressure recovery. This leads to the elevated transaortic valve pressure gradients noted on both Doppler and cardiac catheterization. Such situations may present a diagnostic dilemma where traditional measures of stenosis severity indicate severe AS, while imaging modalities of the aortic valve geometric aortic valve area (GOA) suggest less than severe stenosis. In this study, we present a series of cases exemplifying this clinical dilemma and demonstrate how color M-mode, 2D and 3D transthoracic (TTE) and transesophageal (TEE) echocardiography, cardiac computed tomography angiography (CTA), and magnetic resonance imaging (MRI), may be used to resolve such discrepancies. © 2014, Wiley Periodicals, Inc.


Agarwal R.,Indiana University | Agarwal R.,Richard udebush Va Medical Center | Michael Bouldin J.,Indiana University | Light R.P.,Indiana University | Garg A.,Arizona
Clinical Journal of the American Society of Nephrology | Year: 2011

Background and objectives Hypervolemia is an important and modifiable cause of hypertension. Hypertension improves with probing dry weight, but its effect on echocardiographic measures of volume is unknown. Design, setting, participants, & measurements Shortly after dialysis, echocardiograms were obtained at baseline and longitudinally every 4 weeks on two occasions. Among 100 patients in the additional ultrafiltration group, 198 echocardiograms were performed; among 50 patients in the control group, 104 echocardiograms were performed. Results Baseline inferior vena cava (IVC)insp diameter was approximately 5.1 mm/m2; with ultrafiltration, change in IVCinsp diameter was -0.95 mm/m2 more compared with the control group at 4 weeks and -1.18 mm/m2 more compared with the control group at 8 weeks. From baseline IVCexp diameter of approximately 8.2 mm/m2, ultrafiltration-induced change at 4 weeks was -1.06 mm/m2 more and at 8 weeks was -1.07 mm/m2 more (P = 0.044). From a baseline left atrial diameter of 2.1 cm/m2, ultrafiltration-induced change at 4 weeks was -0.14 cm/m2 more and at 8 weeks was -0.15 cm/m2 more. At baseline, there was no relationship between interdialytic ambulatory BP and echocardiographic parameters of volume. The reduction in interdialytic ambulatory BP was also independent of change in the echocardiographic volume parameters. Conclusions The inferior vena cava and left atrial diameters are echocardiographic parameters that are responsive to probing dry weight; thus, they reflect excess volume. However, echocardiographic volume parameters are poor determinants of interdialytic BP, and their change does not predict the BP response to probing dry weight. © 2011 by the American Society of Nephrology.


Thiels C.A.,Minnesota | Gonzalez A.B.,Minnesota | Gray R.J.,Arizona | Jakub J.W.,Minnesota
Journal of Surgical Oncology | Year: 2016

Introduction: Hyperthermic isolated limb perfusion (HILP) has an established role in the management of melanoma, but its role for Merkel cell carcinoma (MCC) is less well defined. Methods: Retrospective review of our institutional experience with HILP for MCC was conducted (2009-2015). Literature search was performed through 04/2015 and 10 studies met inclusion criteria. Results: Four patients underwent HILP for MCC at our institution. There were no major complications and complete response was achieved in all patients. Early metastatic recurrence developed in two patients. The remaining two had no evidence of disease at last follow-up (36 months) or death (39 months). Systematic review identified an additional 12 pts that underwent HILP for MCC, for a total of 16 cases. Median age was 73 [IQR 69-78] years and 56% were men. Of the patients with reported follow-up, 12 (86%) had complete response, 1 had stable disease, and 1 partial response. Four patients developed local-regional recurrence and six distant metastases, all within 6 months. Overall median follow-up time was 15 [7-36] months. Conclusion: Among a highly selective group of patients, regional perfusion for MCC is safe and has a high complete response rate. HILP is an acceptable therapeutic modality for obtaining durable loco-regional control but early distant metastatic disease remains a significant cause of mortality. © 2016 Wiley Periodicals, Inc.


Patent
Arizona | Date: 2012-11-21

The invention provides arrays of compound for use in profiling samples. The arrays include compounds bind to components of the samples at relatively low affinities. The avidity of compounds binding to components of the samples can be increased by forming arrays such that multivalent components of the samples (e.g., antibodies or cells) can bind to more than one molecule of a compound at the same time. When a sample is applied to an array under such conditions, the compounds of the array bind to component(s) of the sample with significantly different avidities generating a profile characteristic of the sample.


Patent
Arizona | Date: 2011-11-29

Embodiments of flexible identification systems are described herein. Other embodiments and related methods are also disclosed herein.


PubMed | Arizona.
Type: Journal Article | Journal: Gastroenterology & hepatology | Year: 2016

Bariatric surgery is increasingly being performed in the medically complicated obese population as convincing data continue to mount, documenting the success of surgery not only in achieving meaningful weight loss but also in correcting obesity-related illnesses. Several surgical procedures with varying degrees of success and complications are currently being performed. This article discusses the short- and long-term gastrointestinal complications for the 4 most common bariatric surgical procedures: laparoscopic adjustable gastric banding, vertical sleeve gastrectomy, Roux-en-Y gastric bypass, and biliopancreatic diversion with duodenal switch.

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