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Dive into the research topics where Mehmet Engin Tezcan is active.

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Featured researches published by Mehmet Engin Tezcan.


Skeletal Radiology | 2013

Real-time sonoelastography of Achilles tendon in patients with ankylosing spondylitis.

Aynur Turan; Abdurrahman Tufan; R. Mercan; Mehmet Akif Teber; Mehmet Engin Tezcan; Berivan Bitik; Berna Goker; Seminur Haznedaroglu

ObjectiveReal-time sonoelastography (SE) is a new ultrasound-based imaging technique that provides information on tissue elasticity and stiffness. We determined the efficacy of SE for assessing Achilles tendon abnormalities in patients with ankylosing spondylitis (AS).Materials and methodsForty-one consecutive AS patients and 32 asymptomatic healthy subjects were enrolled. Achillodynia was scored on a 0- to 100-mm visual analog scale. A high-resolution ultrasound machine equipped with an elastography-compatible linear probe was used to perform bilateral B-mode ultrasound, Doppler ultrasound, and SE examinations of Achilles tendons. Tendons were divided into proximal, middle, and distal segments. B-mode examinations included tendon thicknesses, echotextures, and enthesopathic findings. SE using color-coded images was performed in the same areas. Normal consistent tendon structures were coded as blue or green, and moderately (yellow) or severely (red) softened areas were considered pathological.ResultsThe distal third of the Achilles tendons was the most commonly affected part in the AS patients compared with healthy subjects (p = 0.001), whose middle third was more commonly affected. Achillodynia intensity tended to be higher in patients with pathological B-mode or SE examination findings (p = 0.09 and p = 0.07 respectively). Softening detected by SE in the distal third was associated with enthesopathy findings such as calcaneal bone erosions (Fisher’s X2, p = 0.07) and tendinous enlargement (Fisher’s X2, p = 0.001). B-mode and SE findings had moderate to good correlation in the assessment of Achilles tendon abnormalities.ConclusionsSonoelastography may be useful for the evaluation of tendon abnormalities in patients with AS; in addition; it may be useful for the evaluation of other inflammatory rheumatic conditions.


The Journal of Rheumatology | 2012

Initial diagnosis of lumbar disc herniation is associated with a delay in diagnosis of ankylosing spondylitis.

Vedat Gerdan; Servet Akar; Dilek Solmaz; Yavuz Pehlivan; Ahmet Mesut Onat; Bunyamin Kisacik; Mehmet Sayarlioglu; Cigdem Erhan; Mehmet Engin Tezcan; Mehmet Akif Öztürk; Fatos Onen; Nurullah Akkoc

Objective. There is often a considerable delay in diagnosis of ankylosing spondylitis (AS). In this multicenter study, we analyzed the delay and possible associated factors, including an initial diagnosis of lumbar disc herniation (LDH), which we frequently encounter in daily clinical practice. Methods. The study included 393 consecutive patients [258 men (65.6%), mean age 39.3 ± 10.8 yrs] with AS according to the modified New York criteria. Face-to-face interviews were done using a structured questionnaire, addressing all the potentially relevant factors. Results. The mean diagnostic delay was 8.1 ± 8.6 years in the whole study population. The shortest delay was observed when rheumatologists were the first physicians consulted (2.9 ± 5.3 yrs). An initial diagnosis of LDH was reported by 33% of the patients. The diagnostic delays in patients with an initial diagnosis of LDH and those without were 9.1 ± 8.5 years and 6.2 ± 7.4 years, respectively (p = 0.002). In a regression model, predictive factors for delay in diagnosis were age at onset of spondyloarthritic symptoms, back pain, education level, prior diagnosis of LDH, and surgical history for LDH. Conclusion. These results indicate the need to increase awareness of the concept of axial spondyloarthritis among specialists who might be the first physicians consulted by patients with AS for their back pain. There is also a need to develop strategies for early referral of such patients to rheumatologists.


The Journal of Rheumatology | 2010

Reactivated varicella zoster virus may cause peripheral arterial thrombosis.

Mehmet Engin Tezcan; Tuba Kuz Teksut; Ahmet Baran Önal; Mehmet Akif Öztürk

To the Editor: The varicella zoster virus (VZV) is a double-stranded DNA virus of the Herpesviridae family. The virus, which causes chicken pox, primarily infects children. Generally, after the infection, the virus becomes latent in ganglionic neurons along the entire neuroaxis. In particular cases, years after the infection, the reactivation of the VZV can cause zoster (shingles). A 71-year-old man had arterial thrombosis after a herpes zoster infection. For 5 years prior to hospital admission, he had been receiving treatment for recurrent episcleritis and temporal arteritis. His first admission was because of numbness in his left hand. Two weeks before admission, he had been diagnosed with a herpes zoster eruption in his left upper extremity matching with the C6 dermatome. When his symptoms began, he was taking 20 mg/day leflunomide and 7.5 mg/day prednisolone. At his first examination, he had no pulse in his left radial artery. Double subtraction angiography of the left upper extremity showed the proximal left radial artery was thin-caliber and occluded (Figure 1). His left hand was supplied from the palmar arch, which included the ulnar artery (Figure 2 … Address correspondence to Dr. M.E. Tezcan; E-mail: engintez{at}yahoo.com


Brain and behavior | 2016

Cognition, depression, fatigue, and quality of life in primary Sjögren's syndrome: correlations.

Belgin Koçer; Mehmet Engin Tezcan; Hale Zeynep Batur; Şeminur Haznedaroğlu; Berna Goker; Ceyla Irkec; Rümeysa Çetinkaya

The aim of the present study was to investigate the prevalence and pattern of cognitive dysfunction observed in primary Sjögrens syndrome (PSS) and to examine the relationships between cognitive abilities, depression, fatigue, and quality of life.


International Scholarly Research Notices | 2014

Minimally invasive minor salivary gland biopsy for the diagnosis of amyloidosis in a rheumatology clinic.

R. Mercan; Berivan Bitik; Mehmet Engin Tezcan; Arif Kaya; Abdurrahman Tufan; Mehmet Akif Öztürk; Seminur Haznedaroglu; Berna Goker

Background. Systemic amyloidosis is a potentially fatal condition, unless diagnosed and treated before development of irreversible organ damage. Demonstration of amyloid deposits within tissue biopsies is only definitive diagnostic method, which makes appropriate selection of biopsy site essential. Herein, we evaluated efficacy of minimally invasive minor salivary gland biopsy (MSGB) for the diagnosis of amyloidosis. Methods. We analyzed 37 biopsies taken from 35 patients. Suggestive findings for amyloidosis were significant proteinuria, renal impairment, refractory diarrhea, neuropathy, and restrictive cardiomyopathy. Minor salivary gland was the initial biopsy site in all subjects. When MSGB was negative but there was a high suspicion for amyloidosis, a kidney, duodenum, or rectal biopsy was performed for further investigation. Results. Mean age of patients was 45.4 and 21 were female. In 11 patients amyloidosis was diagnosed with MSGB. In overall 18 patients were diagnosed with amyloidosis. Sixteen of them were identified as being of AA type and two were AL type amyloidosis. The sensitivity of minimally invasive MSGB is 61.1% for diagnosing amyloidosis in this study. Conclusion. MSGB is a safe and simple method for the diagnosis of amyloidosis which can be performed in an outpatient setting. We suggest extensive use of this minimally invasive method.


Arthritis Care and Research | 2018

A Nationwide Experience With The Off‐label Use of Interleukin‐1 Targeting Treatment in Familial Mediterranean Fever Patients

Servet Akar; P. Cetin; Umut Kalyoncu; Omer Karadag; Ismail Sari; Muhammed Cınar; Sedat Yilmaz; Ahmet Mesut Onat; Bunyamin Kisacik; Abdulsamet Erten; Ayse Balkarli; Orhan Kucuksahin; Sibel Yilmaz Oner; Soner Senel; Abdurrahman Tufan; Ferhat Oksuz; Yavuz Pehlivan; Ö. Bayındır; Gokhan Keser; Kenan Aksu; A. Omma; Timuçin Kaşifoğlu; A.U. Unal; Fatih Yildiz; Mehmet Ali Balcı; Sule Yavuz; Sukran Erten; Metin Özgen; Mehmet Sayarlioglu; Atalay Dogru

Approximately 30–45% of patients with familial Mediterranean fever (FMF) have been reported to have attacks despite colchicine treatment. Currently, data on the treatment of colchicine‐unresponsive or colchicine‐intolerant FMF patients are limited; the most promising alternatives seem to be anti–interleukin‐1 (anti–IL‐1) agents. Here we report our experience with the off‐label use of anti–IL‐1 agents in a large group of FMF patients.


Arthritis & Rheumatism | 2017

ACR/EULAR Sjögren classification criteria may not be adequate for extraglandular disease and necessitates defining ‘seronegative Sjögren's syndrome’

Mehmet Engin Tezcan; Hamit Kucuk; Berna Goker

for the differentiation and expansion of IL-17Aand IL-22producing human Vg2Vd2 T cells. J Immunol 2010;184:7268–80. 7. Laggner U, Di Meglio P, Perera GK, Hundhausen C, Lacy KE, Ali N, et al. Identification of a novel proinflammatory human skin-homing Vg9Vd2 T cell subset with a potential role in psoriasis. J Immunol 2011;187:2783–93. 8. Kenna TJ, Davidson SI, Duan R, Bradbury LA, McFarlane J, Smith M, et al. Enrichment of circulating interleukin-17– secreting interleukin-23 receptor–positive g/d T cells in patients with active ankylosing spondylitis. Arthritis Rheum 2012;64: 1420–9. 9. Gaur P, Misra R, Aggarwal A. Natural killer cells and gd T cells alterations in enthesitis related arthritis category of juvenile idiopathic arthritis. Clin Immunol 2015;161:163–9. 10. Bowness P, Ridley A, Shaw J, Chan AT, Wong-Baeza I, Fleming M, et al. Th17 cells expressing KIR3DL21 and responsive to HLA-B27 homodimers are increased in ankylosing spondylitis. J Immunol 2011;186:2672–80. 11. Noordenbos T, Yeremenko N, Gofita I, van de Sande M, Tak PP, Canete JD, et al. Interleukin-17–positive mast cells contribute to synovial inflammation in spondylarthritis. Arthritis Rheum 2012;64:99–109. 12. Ciccia F, Guggino G, Rizzo A, Saieva L, Peralta S, Giardina A, et al. Type 3 innate lymphoid cells producing IL-17 and IL-22 are expanded in the gut, in the peripheral blood, synovial fluid and bone marrow of patients with ankylosing spondylitis. Ann Rheum Dis 2015;74:1739–47. 13. Appel H, Maier R, Wu P, Scheer R, Hempfing A, Kayser R, et al. Analysis of IL-17 cells in facet joints of patients with spondyloarthritis suggests that the innate immune pathway might be of greater relevance than the Th17-mediated adaptive immune response. Arthritis Res Ther 2011;13:R95. 14. Laloux L, Voisin MC, Allain J, Martin N, Kerboull L, Chevalier X, et al. Immunohistological study of entheses in spondyloarthropathies: comparison in rheumatoid arthritis and osteoarthritis. Ann Rheum Dis 2001;60:316–21. 15. McGonagle D, Marzo-Ortega H, O’Connor P, Gibbon W, Hawkey P, Henshaw K, et al. Histological assessment of the early enthesitis lesion in spondyloarthropathy. Ann Rheum Dis 2002; 61:534–7. 16. Bertotto A, Spinozzi F, Vagliasindi C, Vaccaro R. gd T cells in aqueous humour from untreated idiopathic uveitis patients. Br J Ophthalmol 1995;79:395. 17. Verjans GM, van Hagen PM, van der Kooi A, Osterhaus AD, Baarsma GS. Vg9Vd2 T cells recovered from eyes of patients with Behcet’s disease recognize non-peptide prenyl pyrophosphate antigens. J Neuroimmunol 2002;130:46–54. 18. Lo Presti E, Caccamo N, Orlando V, Dieli F, Meraviglia S. Activation and selective IL-17 response of human Vg9Vd2 T lymphocytes by TLR-activated plasmacytoid dendritic cells. Oncotarget 2016;7:60896–905.


Case reports in orthopedics | 2012

An Unusual Case of Madelung's Disease with Multiple Atypical Fractures

Abdurrahman Tufan; R. Mercan; Arif Kaya; Mehmet Engin Tezcan; Berivan Bitik; Mehmet Akif Öztürk; Seminur Haznedaroglu; Berna Goker

Madelungs disease is a rare acquired disorder of fat metabolism characterized by multiple symmetric lipomas with typical distribution mainly around the upper trunk, neck, and shoulders. The condition is strongly associated with chronic alcohol use and has various systemic manifestations like polyneuropathy, muscle weakness, and small bone fractures. Herein, we report a 56-year-old male patient with Madelungs disease and multiple fractures and discuss possible underlying factors leading to multiple fractures.


BMC Ophthalmology | 2018

Effect of oral Colchicine on Peripapillary retinal nerve fiber layer thickness in patients with familial Mediterranean fever

Burak Tanyıldız; Mehmet Engin Tezcan; Baran Kandemir; Nesrin Tutaş Günaydın; Eren Göktaş; Aise Tangılntız; Aysu Karatay Arsan

BackgroundThe purpose of this study is to investigate whether oral colchicine has an effect on peripapillary retinal nerve fiber layer (pRNFL) thickness of familial Mediterranean fever (FMF) patients.MethodsWe conducted a cross sectional study by comparing pRNFL thickness of FMF patients on colchicine (treated group), newly diagnosed colchicine naïve FMF patients (untreated group) and healthy controls. The study included 66 FMF patients and 32 healthy control subjects. Treated FMF patients were grouped according to colchicine use, duration of use and dosage. pRNFL thickness of the patients and controls were measured by using optical coherence tomography and the measurements were compared.ResultsNo statistically significant difference was found between the pRNFL thickness in untreated group, treated group and the healthy control group (all p > 0.05). No statistically significant difference was found between pRNFL thickness in the healthy control group and FMF patients grouped according to duration or dosage of colchicine use (all p > 0.05).ConclusionsAccording to our study, FMF and oral colchicine use had no statistically significant effect on pRNFL thickness.


International Journal of Rheumatic Diseases | 2016

Primary Sjögren's syndrome is associated with significant cognitive dysfunction.

Mehmet Engin Tezcan; Emine Belgin Kocer; Seminur Haznedaroglu; Cemile Sönmez; R. Mercan; Ayşegül Yücel; Ceyla Irkec; Berivan Bitik; Berna Goker

Cognitive dysfunction is a neurologic manifestation in primary Sjögren syndrome (PSS). On the other hand, several antibodies are related to cognitive dysfunction. The aim of this study is to assess the cognitive dysfunction of PSS patients via detailed neurologic tests. Moreover, its associations with antibodies were also evaluated.

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