251
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Looi JL, Edwards C, Armstrong G, Patel H, Scott T, Hart H, Christiansen J. Dilated Cardiomyopathy in Maori Patients Assessed by Contrast-Enhanced Cardiac MRI. Heart Lung Circ 2007. [DOI: 10.1016/j.hlc.2007.06.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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252
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Looi JL, Edwards C, Armstrong G, Patel H, Scott T, Hart H, Christiansen J. Characteristics and Prognostic Importance of Myocardial Fibrosis in Dilated Cardiomyopathy, Detected by Contrast-Enhanced Cardiac MRI. Heart Lung Circ 2007. [DOI: 10.1016/j.hlc.2007.06.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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253
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Joseph J, Oleynik D, Rentschler M, Boczko J, Patel H. THE ARRIVAL OF MICROROBOTS IN UROLOGICAL SURGERY. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/s1569-9056(06)60130-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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254
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Wilkinson PA, Simpson MA, Bastaki L, Patel H, Reed JA, Kalidas K, Samilchuk E, Khan R, Warner TT, Crosby AH. A new locus for autosomal recessive complicated hereditary spastic paraplegia (SPG26) maps to chromosome 12p11.1-12q14. J Med Genet 2006; 42:80-2. [PMID: 15635080 PMCID: PMC1735920 DOI: 10.1136/jmg.2004.020172] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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255
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Hughes LB, Beasley TM, Patel H, Tiwari HK, Morgan SL, Baggott JE, Saag KG, McNicholl J, Moreland LW, Alarcón GS, Bridges SL. Racial or ethnic differences in allele frequencies of single-nucleotide polymorphisms in the methylenetetrahydrofolate reductase gene and their influence on response to methotrexate in rheumatoid arthritis. Ann Rheum Dis 2006; 65:1213-8. [PMID: 16439441 PMCID: PMC1798268 DOI: 10.1136/ard.2005.046797] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The anti-folate drug methotrexate (MTX) is commonly used to treat rheumatoid arthritis. OBJECTIVE To determine the allele frequencies of five common coding single-nucleotide polymorphisms (SNPs) in the methylenetetrahydrofolate reductase (MTHFR) gene in African-Americans and Caucasians with rheumatoid arthritis and controls to assess whether there are differences in allele frequencies among these ethnic or racial groups and whether these SNPs differentially affect the efficacy or toxicity of MTX. METHODS Allele frequencies in the 677, 1298 and 3 additional SNPs in the MTHFR coding region in 223 (193 Caucasians and 30 African-Americans) patients with rheumatoid arthritis who previously participated in one of two prospective clinical trials were characterised, and genotypes were correlated with the efficacy and toxicity of MTX. Another 308 subjects with rheumatoid arthritis who participated in observational studies, one group predominantly Caucasian and the other African-American, as well as 103 normal controls (53 African-Americans and 50 Caucasians) were used to characterise allele frequencies of these SNPs and their associated haplotypes. RESULTS Significantly different allele frequencies were seen in three of the five SNPs and haplotype frequencies between Caucasians and African-Americans. Allele frequencies were similar between patients with rheumatoid arthritis and controls of the same racial or ethnic group. Frequencies of the rs4846051C, 677T and 1298C alleles were 0.33, 0.11 and 0.13, respectively, among African-Americans with rheumatoid arthritis. Among Caucasians with rheumatoid arthritis, these allele frequencies were 0.08 (p<0.001 compared with African-Americans with rheumatoid arthritis), 0.30 (p = 0.002) and 0.34 (p<0.001), respectively. There was no association between SNP alleles or haplotypes and response to MTX as measured by the mean change in the 28-joint Disease Activity Score from baseline values. In Caucasians, the 1298 A (major) allele was associated with a significant increase in MTX-related adverse events characteristic of a recessive genetic effect (odds ratio 15.86, 95% confidence interval 1.51 to 167.01; p = 0.021), confirming previous reports. There was an association between scores of MTX toxicity and the rs4846051 C allele, and haplotypes containing this allele, in African-Americans, but not in Caucasians. CONCLUSIONS : These results, although preliminary, highlight racial or ethnic differences in frequencies of common MTHFR SNPs. The MTHFR 1298 A and the rs4846051 C alleles were associated with MTX-related adverse events in Caucasians and African-Americans, respectively, but these findings should be replicated in larger studies. The rs4846051 SNP, which is far more common in African-Americans than in Caucasians, can also be proved to be a useful ancestry informative marker in future studies on genetic admixture.
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256
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Mishra NK, Patel H, Hastak SM. Comprehensive stroke care: an overview. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2006; 54:36-41. [PMID: 16649738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Stroke is a global epidemic and an important cause of morbidity and mortality. It ranks next to cardiovascular disease and cancer as a cause of death. "India is likely to suffer huge social and economic burden in the rehabilitation of stroke patients owing to increased life expectancy" and urbanization. Though, there are national programs in malaria eradication and tuberculosis control, there is hardly any governmental support in stroke management and rehabilitation. We propose to formulate stroke-prevention strategies specific to our national needs and covering all the age groups. Allocation of resources towards the stroke management and research is needed. Emphasis on stroke awareness in community should be stressed and should be inclusive of means of primordial and primary prevention apart from management of stroke and its recurrence. Recent international experience in stroke management has suggested the need of specialized stroke units (comprehensive stroke care under one roof). We wish to establish the need of creating awareness regarding the urgency of specialized care in acute stroke. We also wish to motivate our national health institutions to offer affordable, evidence based management of stroke and offer opportunities in stroke training and research.
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257
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Ullah MZ, Patel H, Lauffer GL, Tanner A. Second case report of a metachronous double primary gastric cancer. Br J Hosp Med (Lond) 2005; 66:538-9. [PMID: 16200801 DOI: 10.12968/hmed.2005.66.9.19709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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258
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Patel H, Yashar C, Silverman C, Carrascosa L, Paris K, Jose B, Spanos W. Evaluation of Scrotal and Testicular Dose when using Radiation for Heterotopic Ossification Prophylaxis. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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259
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Sidransky S, Patel H, Kleinberg J, Kaiafas C, Gohsler S, Szucs P. Comet Tail Artifacts on Lung Sonography Predict the Presence of Congestive Heart Failure and Elevated B-Type Natriuretic Peptide Levels. Ann Emerg Med 2005. [DOI: 10.1016/j.annemergmed.2005.06.193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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260
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Patel H, Rees RT. Unicystic Ameloblastoma presenting in Gardner's Syndrome: A case report. Br Dent J 2005; 198:747-8. [PMID: 15980833 DOI: 10.1038/sj.bdj.4812413] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2003] [Accepted: 01/05/2005] [Indexed: 11/09/2022]
Abstract
An unusual case of a unicystic Ameloblastoma mimicking a dentigerous cyst in a 14-year-old patient with Gardner's Syndrome is described. Gardner's Syndrome is associated with multiple tumours and dental anomalies.
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261
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Kiger WS, Lu XQ, Harling OK, Riley KJ, Binns PJ, Kaplan J, Patel H, Zamenhof RG, Shibata Y, Kaplan ID, Busse PM, Palmer MR. Preliminary treatment planning and dosimetry for a clinical trial of neutron capture therapy using a fission converter epithermal neutron beam. Appl Radiat Isot 2005; 61:1075-81. [PMID: 15308195 DOI: 10.1016/j.apradiso.2004.05.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A Phase I/II clinical trial of neutron capture therapy (NCT) was conducted at Harvard-MIT using a fission converter epithermal neutron beam. This epithermal neutron beam has nearly ideal performance characteristics (high intensity and purity) and is well-suited for clinical use. Six glioblastoma multiforme (GBM) patients were treated with NCT by infusion of the tumor-selective amino acid boronophenylalanine-fructose (BPA-F) at a dose of 14.0 g/m(2) body surface area over 90 min followed by irradiation with epithermal neutrons. Treatments were planned using NCTPlan and an accelerated version of the Monte Carlo radiation transport code MCNP 4B. Treatments were delivered in two fractions with two or three fields. Field order was reversed between fractions to equalize the average blood boron concentration between fields. The initial dose in the dose escalation study was 7.0 RBEGy, prescribed as the mean dose to the whole brain volume. This prescription dose was increased by 10% to 7.7 RBEGy in the second cohort of patients. A pharmacokinetic model was used to predict the blood boron concentration for determination of the required beam monitor units with good accuracy; differences between prescribed and delivered doses were 1.5% or less. Estimates of average tumor doses ranged from 33.7 to 83.4 RBEGy (median 57.8 RBEGy), a substantial improvement over our previous trial where the median value of the average tumor dose was 25.8 RBEGy.
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262
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Amin AJ, Randhawa D, Janbay N, Abo S, Patel H, Miglani M, Ojha R, Nath R. Treatment outcomes in elderly patients (≥ 60 years) with acute myeloid leukemia (AML) and refractory anemia with excess blasts (RAEB) with intensive chemotherapy: A retrospective single center analysis. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.6724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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263
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Patel H, Aleem A, Heng EL, Patel M, Theobald N. Protecting the future of sexual health services: lessons from the retail industry. Int J STD AIDS 2005; 16:456-8. [PMID: 15969787 DOI: 10.1258/0956462054093971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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264
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Yalavarthy P, Karlekar K, Patel H, Vasu R, Pramanik M, Mathias P, Jain B, Gupta P. Experimental investigation of perturbation Monte-Carlo based derivative estimation for imaging low-scattering tissue. OPTICS EXPRESS 2005; 13:985-997. [PMID: 19494962 DOI: 10.1364/opex.13.000985] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Experimental results for imaging the low-scattering tissue phantoms based on the derivative estimation through perturbation Monte-Carlo (pMC) method are presented. It is proven that pMC-based methods give superior reconstructions compared to diffusion-based reconstruction methods. An easy way to estimate the Jacobian using analytical expression obtained from perturbation Monte-Carlo method is employed. Simulation studies on the same objects, considered in the experiment, are performed and corresponding results are found to be in reasonable agreement with the experimental studies. It is shown that inter-parameter cross talk in diffusion based methods lead to false results for the low-scattering tissue, where as the pMC-based method gives accurate results.
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265
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Soni HC, Patel SB, Shah SR, Patel H, Patel D. Case report : Urachal pathologies. Indian J Radiol Imaging 2005. [DOI: 10.4103/0971-3026.29156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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266
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Patel H, Heng EL, Aleem A, Chung N, John M, Tang O, Theobald N. GU medicine consultants' and clients' opinions on general practitioner involvement with sexual health care. Int J STD AIDS 2004; 15:779. [PMID: 15537470 DOI: 10.1258/0956462042395140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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267
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Kiger JL, Kiger WS, Patel H, Binns PJ, Riley KJ, Hopewell JW, Harling OK, Coderre JA. Effects of boron neutron capture irradiation on the normal lung of rats. Appl Radiat Isot 2004; 61:969-73. [PMID: 15308177 DOI: 10.1016/j.apradiso.2004.05.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The whole lung of rats was irradiated with X-rays, thermal neutrons, or thermal neutrons in the presence of p-boronophenylalanine (BPA). A >/= 20% increase in breathing rate, in the period 40-80 days after irradiation, was indicative of radiation-induced pneumonitis. The ED(50) (+/-SE) for a >/= 20% increase in breathing rate, relative to age-matched controls, was 11.6 +/- 0.13 Gy for X-rays and 9.6 +/- 0.08 Gy for neutrons only. This indicated a thermal neutron beam RBE of 1.2 and an RBE of 2.2 for the high-LET components of the dose, assuming a dose reduction factor of 1.0 for gamma rays. Preliminary data indicate the compound biological effectiveness factor for BPA in the lung is approximately 1.5.
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268
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Tupesis JP, Kaminski A, Patel H, Howes D. A penny for your thoughts: Small bowel obstruction secondary to coin ingestion. J Emerg Med 2004; 27:249-52. [PMID: 15388210 DOI: 10.1016/j.jemermed.2004.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2003] [Revised: 01/28/2004] [Accepted: 03/02/2004] [Indexed: 10/26/2022]
Abstract
We report a case of small bowel obstruction secondary to coin ingestion. A 22-year-old woman presented to the Emergency Department (ED) with a 3-week history of abdominal pain. Upon initial history the patient denied any foreign body ingestion. Only after computed tomography (CT) scanning of the abdomen and pelvis did the patient admit to deliberate ingestion of a single United States penny coin. During surgical evaluation it was found that the coin had lodged near the ileocecal valve and an inflammatory mass had formed around the intraluminal coin, causing a 10 x 7 cm fibrous tumor to completely obstruct the small bowel. It is thought that oxidation of the coin, with subsequent exposure of its high zinc content, instigated the inflammatory cascade.
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269
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Krishnamurthy M, Desai R, Patel H. Spontaneous coronary artery dissection in the postpartum period: association with antiphospholipid antibody. Heart 2004; 90:e53. [PMID: 15310722 PMCID: PMC1768459 DOI: 10.1136/hrt.2004.038869] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Spontaneous coronary artery dissection (SCAD) is an extremely uncommon cause of myocardial infarction, occurring predominantly in women during or after pregnancy. The exact aetiology is unknown. This report describes a 33 year postpartum woman with diagnosed SCAD who tested positive for anticardiolipin antibody. This is the first case of SCAD in a patient with antiphospholipid antibody. The authors hypothesised that there should be a strong association between them.
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270
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Krishnamurthy M, Desai RV, Patel H. A man with drowsiness and abdominal pain. Postgrad Med J 2004; 80:555, 557. [PMID: 15356361 PMCID: PMC1743089 DOI: 10.1136/pgmj.2003.014746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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271
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Bastian B, Curtin J, Fridlyand J, Patel H, Pinkel D, Busam K, Kutzner H, Kageshita T. Braf and Melanocytic diseases. ACTA ACUST UNITED AC 2004. [DOI: 10.1111/j.1600-0749.2004.00175_6.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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272
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Patel H, Egorin MJ, Remick SC, Mulkerin D, Takimoto CHM, Doroshow JH, Potter D, Ivy SP, Murgo AJ, Ramanathan RK. Comparison of Child-Pugh (CP) criteria and NCI organ dysfunction working group (NCI-ODWG) criteria for hepatic dysfunction (HD): Implications for chemotherapy dosing. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.6051] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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273
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Gouin S, Trieu TV, Patel H, Bergeron S, Amre D, Guérin R. 124 The Effect of Picture Archiving and Communications Systems on the Diagnostic Performance of Pediatric Emergency Physicians. Paediatr Child Health 2004. [DOI: 10.1093/pch/9.suppl_a.57ab] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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274
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Korcyk D, Edwards CC, Armstrong G, Christiansen JP, Howitt L, Sinclair T, Bargeois M, Hart H, Patel H, Scott T. Contrast?Enhanced Cardiac Magnetic Resonance in a Patient with Familial Isolated Ventricular Non?compaction. J Cardiovasc Magn Reson 2004; 6:569-76. [PMID: 15137342 DOI: 10.1081/jcmr-120030586] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Isolated ventricular non-compaction (IVNC) is an idiopathic form of cardiomyopathy. Recent clinical reports have suggested that this form of cardiomyopathy is more frequently associated with complications of congestive heart failure, thromboembolism and malignant ventricular arrhythmias. Contrast enhanced cardiac magnetic resonance imaging with its excellent spatial resolution, its large field of view and its ability to demonstrate thrombus and myocardial scar is an excellent modality to non-invasively assess patients with this form of cardiomyopathy. This paper presents a case of familial isolated ventricular non-compaction. We describe the echocardiographic, X-ray angiographic and cardiac MRI findings. Cine imaging using a steady-state free precession sequence (BFFE) was performed in axial and short axis planes. Left ventricular (LV) mass was estimated both with and without the incorporation of trabeculations from a contiguous stack of short axis images. Trabecular mass was expressed as a percentage of total left ventricular mass. We compared trabecular mass: total LV mass in 10 patients with dilated cardiomyopathy. The mean percentage trabecular mass: LV mass in dilated cardiomyopathy was 11.3% (range 1.5%-19%), and this differed significantly from the trabecular mass of the noncompaction patient (two-tailed Mann-Whitney test, p = 0.028). Trabecular mass of greater than 20% of total myocardial mass may be a useful index to suggest the diagnosis of IVNC. Gadolinium was administered (0.1 mmol/kg). Qualitative analysis of first pass perfusion suggested reduced trabecular perfusion. Early imaging with an inversion recovery sequence and a fixed long inversion time did not demonstrate LV thrombus. Late imaging with the same sequence (TI = 280-300 msec) did not demonstrate myocardial fibrosis.
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275
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Patel AL, Jayaram S, Shaikh WA, Basavaraj A, Patel H, Malaviya AP, Kabra D, Patil A, Bhende N. Primary systemic amyloidosis. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2004; 52:335-7. [PMID: 15636344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
We report here a case of a 35-year-old male who presented with multi-system disease, which on evaluation was found to be due to primary systemic amyloidosis. We present the myriad manifestations of this uncommon disease entity.
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