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Öğe Anti-inflammatory activity of Anthemis tricolor Boiss(Termedia Publishing House Ltd, 2019) Demirkan, Serkan; Ozcinar, Ozge; Kivcak, BijenIntroduction: Traditionally, Anthemis genus has been used for the treatment of gastrointestinal disorders, haemorrhoid and stomach ache in Europe. There are several in-vitro and in-vivo studies that showed the pharmacological properties of Anthemis species such as antibacterial, anti-inflammatory, antiedemic and hepatoprotective properties. Aim: Our study referred to the model of inflammation formed in rats; we aimed to evaluate anti-inflammatory properties of A. tricolor extracts. Material and methods: Five different extracts of A. tricolor were tested against the negative control and 2 different topical corticosteroids (betamethasone and hydrocortisone); n-hexane and sesquiterpene extracts of A. tricolor Bois showed significantly reduced erythema compared to the negative control. Results: Only n-hexane and sesquiterpene extracts of A. tricolor have the anti-inflammatory effect. Conclusions: This is the first report on anti-inflammatory activity of A. tricolor and we showed an anti-inflammatory effect of n-hexane and sesquiterpene extract of A. tricolor with UV erythema test as a_result, hence A. tricolor extracts can be used for the treatment of inflammatory skin diseases due to anti-inflammatory activity.Öğe CAG polymorphism in the androgen receptor gene in women may be associated with nodulocystic acne(Termedia Publishing House Ltd, 2019) Demirkan, Serkan; Sayin, Derya Beyza; Gunduz, OzgurIntroduction: Acne vulgaris (AV) is a multifactorial, inflammatory disease of the pilosebaceous unit. Hormones play a major role in the pathogenesis of acne. In cases of hyperandrogenism; hirsutism, acne, seborrhoea and alopecia appear in women. However, severe acne can also be seen without evidence of hyperandrogenism. In this case, hypersensitivity of the androgen receptor gene (ARG) encoded in the X chromosome, which is the only receptor for androgens, can be considered. ARG contains a polymorphic CAG triple loop encoding the polyglutamine pathway at the 5'end of exon 1. Aim: To investigate CAG repeat polymorphism in the ARG in nodulocystic acne patients in Turkish population. Material and methods: This prospective clinical study was conducted between 2016 and 2017 in accordance with the tenets of the Declaration of Helsinki. DNA isolation from blood was performed using the RTA (R) Genomic DNA Isolation Kit. The fragment lengths obtained from the device to determine CAG repeat numbers were analysed based on -288 bp length 22 CAG repeat content. Results: A total of 199 subjects; 100 patients (51 males, 49 females) and 99 controls (49 males, 50 females) were included in the study. The mean allele length in the patient group was 19.34; and 19.7 in the control group. There was a statistically significant difference between female patients and the control group, when the patients and control groups were compared by gender (p = 0.0059). Conclusions: The CAG trinucleotide repeat count in the ARG may be associated with acne, without hirsutism findings.Öğe Candidal vulvitis: a possible trigger for lichen striatus(John Libbey Eurotext Ltd, 2018) Gunduz, Ozgur; Cakartas, Rebiye; Demirkan, Serkan; Atasoy, Pinar…Öğe Decreased choroidal thickness in vitiligo patients(Bmc, 2018) Demirkan, Serkan; Onaran, Zafer; Samav, Guzin; Ozkal, Fatma; Yumusak, Erhan; Gunduz, Ozgur; Karabulut, AyseBackground: Vitiligo is a disease characterized by depigmented macules and patches that occur as a result of the loss of functional melanocytes from the affected skin through a mechanism which has not been elucidated yet. Destruction of pigment cells in vitiligo may not remain limited to the skin; the eyelashes, iris, ciliary body, choroid, retinal pigment epithelium and meninges may also be affected. This study aims to compare the choroidal thickness of patients with and without vitiligo using optical coherence tomography (OCT). Methods: Spectral-domain optical coherence tomography (SD-OCT) (Retina Scan Advanced RS-3000 NIDEK, Japan) instrument (with lambda = 840 nm, 27,000 A-scans/second and 5 mu m axial resolution) was used for the imaging. Statistical analysis was performed using SPSS 21.0 software package. Results: In all values except optic nevre area measurements, the choroidal thickness of all vitiligo patients was found out to be thinner compared to the control group. Conclusions: In vitiligo, the choroidal thickness may be affected by the loss of melanocytes.Öğe Does influenza subtype H1N1 have a place in the etiology of pityriasis rosea?(Termedia Publishing House Ltd, 2019) Demirkan, Serkan; Kacmaz, BirgulIntroduction: Pityriasis rosea (PR) is an acute, inflammatory skin disease of unknown cause. Various infectious agents including viruses have been proposed as causative agents and presence of influenza subtype H1N1 was shown in case reports with PR, but the relation was not conclusive. We hypothesited that there may be a relation between PR and H1N1, since both of them are prevalent in the same period as winter or season transitions. Aim: To investigate the effect of the H1N1 virus in PR in this study. Material and methods: Twenty-one female and 12 male PR patients who applied to Kirikkale University Faculty of Medicine Hospital Dermatology Outpatient Clinic were included in the study. Influenza subtype H1N1 IgM and IgG antibodies were detected by enzyme immunoassay (EIA) in sera of patients; tissue biopsy specimens were examined for influenza subtype H1N1 RNA by PCR. Results: Seven (23%) of the 33 patients had positive IgM and IgG antibodies. Influenza subtype H1N1 RNA was not detected in the tissue samples of 33 PR patients. Conclusions: According to the results of this study, we can say that influenza subtype H1N1 does not play a role in PR etiology.Öğe Evaluation Of Optic Nerve With Strain And Shear Wave Elastography In Patients With Behcet's Disease And Healthy Subjects(Elsevier Science Inc, 2017) Inal, Mikail; Tan, Sinan; Demirkan, Serkan; Burulday, Veysel; Gunduz, Ozgur; Ornek, KemalThe objective of this study was to investigate the elasticity characteristics of the optic nerve using strain and shear wave elastography in patients with Behc, et's disease and to compare the results with those of healthy volunteers. Forty-six optic nerves from patients with Behc, et's disease and 54 optic nerves from healthy volunteers were investigated prospectively in this study using strain and shear wave elastography. There was a statistically significant difference in terms of elasticity patterns between patients and healthy volunteers (p < 0.001). Elastographic images of healthy volunteers revealed most optic nerves to be type 3 (51.8%); however, type 2 (40.7%) and type 1 (7.5%) were also observed. Elastographic examination of Behc, et's disease patients revealed type 2 in 52.2%, type 1 in 43.5% and type 3 in 4.3% of patients. Statistically significant differences were observed between patients and healthy volunteers in the analysis of shear wave elastography values (p < 0.001). Receiver operating characteristic curve analysis was perfect (0.933) (95% CI = 0.885-0.980), and a cutoff value of 16.5 kPa shear had very high sensitivity and specificity for the patient group. Strain and shear wave elastography findings for the optic nerves of patients with Behc, et's disease were significantly different from those for healthy volunteers. (E-mail: inal_m@hotmail.com) (C) 2017 World Federation for Ultrasound in Medicine & Biology.Öğe Lichen Planus Pigmentosus-Inversus: A Report of Two Cases(2019) Demirkan, Serkan; Gündüz, Özgür; Devrim, TubaLichen planus pigmentosus (LPP)-inversus has been identified in a few East European cases primarily intertriginous areas such as axilla and groin which is not contacting with sunlight, and involvement in other skin areas was rarely detected. Because the lesions are similar to LPP in clinical and histological appearance, this condition, which is characterized by hyperpigmented, brown macules or plaques, is called LPP-inversus. Until today, actinic LP, linear LP, zosteriform, and LP pigmentosus clinical subtypes of lichen planus have been described. LPP-inversus is a rare form of LP and so far, there have been few case reports. LPP-inversus has been reported mostly in Caucasians and Asians, and axilla was the most involved body region. In a small proportion (approximately 10%) of the cases, classical LP or LPP lesions may be located outside the flexural areas. So far, about 50 cases have been reported; also we presented two new cases that we diagnosed.Öğe Rationale for the autologous serum skin test in acute versus chronic urticaria(Termedia Publishing House Ltd, 2019) Demirkan, Serkan; Baccioglu, AyseIntroduction: Autologous serum skin test (ASST) is a rapid, in-vivo clinical test to detect functional autoantibodies in patients with chronic spontaneous urticaria (CSU), but the rationale for its use in acute urticaria (AU) is unknown. Aim: To evaluate the efficacy of ASST among patients with AU or CSU. Material and methods: Treatment-naIve adult (age >= 18 years) patients with a diagnosis of AU (< 6 weeks' duration) and CSU were enrolled prospectively in a cross-sectional study. Healthy age- and sex-matched subjects served as controls. Besides a detailed history and physical examination, ASST, total immunoglobulin E (IgE), freeT3 (fT3), freeT4 (fT4), anti-thyroglobulin, and anti-TPO levels were assessed in all subjects. Results: Of 101 subjects, mean age was 34.35 +/- 12.68 years and the study comprised 58.4% of females with no difference between AU (n = 27), CSU (n = 46), and control groups (n = 28). The ratio of positivity in ASST was similar between AU (25.9%) and CSU groups (21.7%), but higher than in controls (10.7%, p = 0.33 for all). The ratio of patients with high total IgE levels (> 100 IU/ml) in AU (85.2%) and CSU (65.2%) groups was similar (p = 0.06), but significantly higher than in the control group (10.7%) (p < 0.001 and p < 0.001). The CSU group had significantly higher abnormal thyroid test results (45.7%) than AU (14.8%) and control groups (3.6%) (p = 0.01 and p < 0.001), whereas patients with clinically diagnosed thyroiditis were only in the CSU group (6.5%). In logistic regression analysis, there was no relation found among the possible risk factors for ASST, even if analysed separately as AU, CSU and control groups. Conclusions: Even though thyroid function test levels were found to be related with CSU, and total IgE was associated with urticaria, ASST was found to be of importance. This study confirms that ASST was insufficient to demonstrate autoimmunity and acute-chronic urticaria nature. Further tests indicating auto-antibodies in AU and CSU are needed.Öğe Retrospective analysis of endemic melasma patients(Pagepress Publ, 2017) Demirkan, Serkan; Gunduz, Ozgur; Dayangan, CemileMelasma is an acquired diffuse hypermelanosis characterized by localized, symmetrical, irregular, light-to-dark brown maculae occurring in sun-exposed areas of skin. The aim of this retrospective study was to determine demographics of patients, analysis of etiologic factors, clinical features, efficacy and side effects of available topical treatments due to high incidence of melasma patients. In this study melasma patients in Birecik State Hospital were investigated retrospectively. Between January 2014 and October 2015, 1008 patients had diagnosis of melasma in 49,809 applications of 24,603 different patients who admitted to Dermatology Outpatient Clinics. Of the 1008 patients, 263 had completed 3-month treatment period. These patients did not receive treatment in June, July, August and September. All melasma patients were rural and dealing with agriculture. There was no significant difference between female and male patients in terms of age. Of the 253 female melasma patients, only 2 of them had not child and none of them were using hormone drug. Of the 263 patients with melasma, Fitzpatrick skin type was 3 in 79 (30%) patients, 4 in 184 (70%) patients. Sanliurfa city showed higher fertility rate, sun exposure, and skin type than Turkey as a whole. These predisposing factors may explain higher melasma occurrence in Sanliurfa. Patient information about preventive measures and treatment play important role in treatment of cosmetic condition. The most important measure seems to advise patients about sun-protection especially during pregnancy.Öğe Signet-ring cells in the skin: a case of late-onset cutaneous metastasis of gastric carcinoma and a brief review of histological approach(Pagepress Publ, 2016) Gunduz, Ozgur; Emeksiz, Mehmet Can; Atasoy, Pinar; Kidir, Mehtap; Yalcin, Selim; Demirkan, SerkanUp to 10% of patients with visceral malignancies develop skin metastases during their clinical course and these metastases constitute about 2% of all skin cancers. Skin metastasis may be the first sign of a clinically silent visceral cancer or represent recurrence of an internal malignancy. In both situations, they are associated with poor prognosis, which can partly be attributed to underdiagnosis. In this paper, a case of relapsing gastric adenocarcinoma, which manifested itself as asymptomatic cutaneous papules and nodules on a patient's head and neck, is reported and histopathological approach to the cutaneous lesions containing signet-ring cell is briefly reviewed.Öğe Skin necrosis: An uncommon side effect of warfarin therapy(2019) Devrim, Tuba; Demirkan, SerkanWarfarin is commonly used in the treatment and prevention of thromboembolic events. However, it is known to undesirably cause hypercoagulable conditions, including warfarin-induced skin necrosis (WISN). This report describes a 70-year-old man presented with an extensive WISN while an inpatient for treatment of a left deep femoral vein thrombosis. He had a background of colon adenocarcinoma and multiple metastatic foci in the liver.Öğe Treatment of multiple eccrine hidrocystoma with oral isotretinoin following erbium-yttrium aluminum garnet laser(Taylor & Francis Inc, 2019) Demirkan, SerkanEccrine hidrocystomes (EH) are benign cystic tumors of dermal eccrine ducts. There is still no gold standard treatment option for EH because of the large number of lesions, the risk of cicatrization and the different treatment options offered. We offer combined oral isotretinoin and following erbium-yttrium aluminum garnet laser treatment as an alternative treatment option in difficult patients with EH.
