Subclinical ocular inflammation in patients with recurrent aphthous stomatitis.

OBJECTIVE: Recurrent aphthous stomatitis (RAS) is the major finding of Behçet's disease as well as an inflammatory disease. We compared the choroidal thickness (CT) in patients with RAS with healthy volunteers. METHODS: Patients with RAS (n = 34) and age- and sex-matched controls (n = 34) were evaluated using spectral-domain optical coherence tomography (OCT). CT measurements were executed at 3 different points (subfoveal, nasal, and temporal). Laboratory parameters were determined for patients and controls. RESULTS: The mean subfoveal CT in the RAS and control groups were 356.7 ± 91.7 µm and 326.3 ± 86.6 µm, respectively. The RAS group demonstrated significantly higher subfoveal CT than the control group (p = 0.008). CONCLUSION: This was the first reported study demonstrating a significantly higher subfoveal CT in patients with RAS. Further studies investigating the risk for subclinical ocular inflammation in this patient population are warranted.

Evaluation of the Effect of Fasting on Glaucoma Patients.

OBJECTIVES: The aim of this research was to evaluate the effect of daytime Ramadan fasting and dehydration on intraocular pressure (IOP) and biometric parameters in primary open-angle glaucoma (POAG) patients. METHODS: This prospective study included 30 eyes of 30 POAG patients who were fasting during Ramadan (Group 1), 40 healthy participants who were fasting (Group 2), and 40 healthy individuals who were not fasting (Group 3). The eyes were evaluated twice a day at approximately 8 am and 4 pm during Ramadan and 1 month after Ramadan. RESULTS: IOP values at 4 pm were higher in Group 1 than Groups 2 and 3 in Ramadan (p=0.029 and 0.007, respectively). The diurnal reduction in IOP was significantly smaller during fasting in the glaucoma patients compared with Groups 2 and 3 (p=0.012 and 0.007, respectively). Comparisons of biometric parameters revealed less reduction in central corneal thickness (CCT) values from 8 am to 4 pm in glaucoma patients than in Groups 2 and 3 (p<0.05 for all comparisons) during Ramadan and after Ramadan. CONCLUSION: POAG patients had a higher IOP at 4 pm during the fasting period than was seen following Ramadan. In addition, the diurnal reduction of IOP and CCT was smaller in patients with POAG compared with healthy subjects.

Effect of nepafenac 0.1% on retinal thickness after cataract surgery in patients without risk factors for cystoid macular edema.

AIM: To evaluate the effect of topical preoperative nepafenac 0.1% treatment on postoperative macular edema using optical coherence tomography (OCT) after uncomplicated cataract surgery. METHODS: Ninety eyes of 90 patients without any risk factors were included in the study. The patients were assigned to three groups: group 1, treated with topical prednisolone acetate 1%; group 2, treated with topical nepafenac 0.1% in addition to prednisolone acetate (1%); and group 3, those who started receiving nepafenac 0.1% treatment 3d prior to surgery and continued the treatment postoperatively in addition to prednisolone acetate (1%). Central retinal thickness (CRT) and macular volume values were recorded using OCT at weeks 3 and 6. RESULTS: The increases in macular volume in the central 1 mm area after 3 and 6wk were significantly lower in patients who used prophylactic topical nepafenac preoperatively (group 3) compared with those in group 1 (P=0.028 and 0.008, respectively). No significant differences in the increase in macular volume and CRT were noted between groups 2 and 3 (P>0.05). In group 1, the increases in macular volume in the central 3 mm area at weeks 3 and 6 were significantly higher than that in group 2 and 3 (3rd week, P=0.004; 6th week, P=0.005). CONCLUSION: Nepafenac 0.1% treatment in addition to topical steroids after uncomplicated cataract surgery reduce the increase in macular volume in the early postoperative period.

Effect of Fasting on Choroidal Thickness and Its Diurnal Variation.

Purpose: The aim of this study was to assess the effect of Ramadan fasting on choroidal thickness (CT) and its associated diurnal variations using spectral domain optic coherence tomography. Materials and Methods: Ocular measurements were performed on a single eye of 87 healthy individuals. Eyes were evaluated twice a day around 8.00 a.m. and 4.00 p.m. during Ramadan. Evaluations were repeated at the same time of the day, 1 month following Ramadan on the same subjects. Measurements of choroidal and retinal thickness were performed at central, temporal and nasal segments. Results: The comparison of measurements revealed that temporal CT at 8.00 a.m. and foveal, temporal and nasal CTs at 4.00 p.m. were significantly reduced during fasting (p values were 0.005, <0.001, 0.001 and 0.046, respectively). Mean changes of CTs during fasting were 14.76 ± 16.01, 9.90 ± 19.57 and 8.10 ± 16.81 µm at the fovea, temporal and nasal segments, respectively. However, CTs at non-fasting conditions were measured as 6.13 ± 12.93, 3.78 ± 15.23 and 5.05 ± 13.60 µm, respectively. In comparison, diurnal variations of foveal and temporal CTs during fasting were significantly higher than the controls (p values were <0.001 and 0.004, respectively). Additionally, retinal thicknesses during fasting were significantly reduced compared to the controls in all segments measured at 4.00 p.m. (p for all values <0.05) Conclusions: The results of the present study revealed that fasting and dehydration caused a reduction of the choroidal and retinal thicknesses. Likewise, they are also responsible for the increased diurnal variation of CTs. Therefore, early hours of the day may be preferred to evaluate retinal and choroidal thicknesses during Ramadan to avoid the effects of dehydration on the measurement results.

Eyes are mirror of the brain: comparison of multiple sclerosis patients and healthy controls using OCT.

Objective: To evaluate the thickness of choroid and retinal nerve fiber layer (RNFL) in multiple sclerosis (MS) patients with and without optic neuritis using enhanced depth imaging optical coherence tomography (EDI-OCT). Methods: In this cross-sectional study, both eyes of 52 MS patients [n = 104 eyes; 62 eyes of MS patients without optic neuritis (MS-NON) and 42 eyes of MS patients with optic neuritis (MS-ON)] and only one eye of 36 healthy control subjects (n = 36 eyes) were evaluated. Complete ophthalmologic examination and EDI-OCT scanning were completed for all participants. Choroidal thickness measurements were executed at three different points. Results: Choroidal thickness measurements were similar between MS patients and healthy control subjects. However, the mean subfoveal choroidal thickness was increased significantly in MS-ON group (399.13 ± 82.91 µm) compared to MS-NON group (342.71 ± 82.46 µm; p = 0.004). Mean RNFL thickness was significantly reduced in MS patients (90.42 ± 13.31 µm) compared to healthy controls (101.18 ± 10.75 µm; p < 0.001). Moreover, temporal RNFL thickness was significantly thinner in MS-ON group (54 ± 14.50 µm) than MS-NON group (62.15 ± 15.88 µm; p = 0.01). In MS patients, temporal RNFL thickness was correlated with both Expanded Disability Status Score (r = 0.383; p < 0.001) and longer disease duration (r=-0.202; p = 0.04). Conclusion: The results of the present study suggest that RNFL thickness can be used as an important parameter while following up with MS patients. However, more studies using EDI-OCT are required with larger MS patient groups and automated method.

Investigation of possible risk factors in the development of seasonal allergic conjunctivitis.

AIM: To analyze the possible risk factors in the development of seasonal allergic conjunctivitis (SAC) through an evaluation of skin allergy tests and data obtained from questionnaires. METHODS: The study included a total of 75 SAC patients and 71 control subjects without SAC diagnosis who were admitted to the Abant Izzet Baysal University Medical Faculty Ophthalmology Clinic between March 2016 and December 2016. Skin prick tests were performed for all participants. Serum levels of total IgE and 25-OH vitamin D were also measured. In the tear, total IgE levels were measured. Moreover, possible risk factors for the onset of SAC (smoking, paracetamol exposure, vitamin D supplementation and environmental factors etc.) were examined for all patients by both prenatal and postnatal aspects. RESULTS: The patients with SAC were found to have a history of maternal paracetamol exposure during the prenatal period. Likewise, in the same patient group, the duration of postnatal vitamin D supplementation was shorter (P<0.001). However, no significant correlation was found between SAC and maternal antibiotic exposure, maternal smoking, the mode of delivery and birth weight, as well as presence of pets. Moreover, patients with SAC were more likely to have asthma, allergic rhinitis and oral allergy syndrome. We have also found that SAC patients' mothers and siblings were more likely to have allergic conjunctivitis. Likewise, their fathers were more likely to have allergic rhinitis. CONCLUSION: Prenatal maternal paracetamol exposure and shorter duration of vitamin D supplementation in the postnatal period may play a role in development of SAC. Therefore prevention of unnecessary gestational paracetamol intake and vitamin D supplementation during infancy could potentially reduce the onset and development of SAC.

An 8-Year Experience With Endoscopic Management of Eroded Gastric Bands.

BACKGROUND/AIMS: We review our 8-year experience with endoscopic removal of eroded gastric bands. MATERIALS AND METHODS: From 2006 to 2014, 25 patients were diagnosed with band erosion. Clinical data concerning the endoscopic procedure were recorded prospectively and reviewed retrospectively. To remove the migrated band, we used an endoscopic approach with a Gastric Band Cutter (GBC). RESULTS: The median time interval from the initial gastric band placement to the diagnosis of band erosion was 41 (18 to 67) months. Upper abdominal pain was the most common symptom (40%). In 24 of the 25 patients, we used the GBC to remove the band endoscopically. It was able to cut the band successfully in all cases except 1, where twisting of the cutting wire required conversion from endoscopy to laparotomy. In 2 cases, the band, after being cut, was locked in the gastric wall and required laparotomic removal. In 1 patient, we had to perform a surgery for intragastric penetration of the connecting tube broken close to the band. Our success rate was 88% in the single session, with no complications. CONCLUSIONS: Endoscopic removal of a migrated band with the GBC seems to be an effective and safe method for band erosion.

Investigation of the choroidal thickness in patients with hypothyroidism.

PURPOSE: The effect of hypothyroidism on the choroidal thickness (CT) was investigated in patients with subclinical hypothyroidism and overt hypothyroidism, and biochemically and clinically euthyroid patients receiving levothyroxine treatment. The patients were compared with healthy subjects. MATERIALS AND METHODS: One eye of 71 hypothyroid and 22 healthy subjects between 20 and 40 years of age were included in this study. CT measurements were taken at the fovea and at 2 points that were 1500 µm nasal and temporal to the fovea using spectral-domain optical coherence tomography. Independent sample t-test's and was used for statistical analysis of the data. RESULTS: The CT was significantly thicker in hypothyroid patients compared to healthy subjects (P values were 0.013 for subfoveal, 0.015 for temporal and 0.020 for nasal segments). The intraocular pressure (IOP) and body mass index (BMI) were also significantly higher in hypothyroid patients (P values were 0.021 and 0.003, respectively). There was not a statistically significant difference in the BMI and IOP measurements between healthy subjects and euthyroid patients (P > 0.05). However, there was a statistically significant difference in the subfoveal, temporal and nasal CT measurements between healthy subjects and euthyroid patients (P values were 0.006, 0.031 and 0.013, respectively). CONCLUSIONS: All subgroups of hypothyroid patients had thicker CT compared to healthy subjects. Euthyroid patients receiving levothyroxine treatment had lower IOP, BMI levels, and serum lipid levels than patients with subclinical hypothyroidism and overt hypothyroidism.

Evaluation of subjects with a moderate cup to disc ratio using optical coherence tomography and Heidelberg retina tomograph 3: impact of the disc area.

AIM: The aim was to evaluate subjects with a moderate cup to disc ratio using optical coherence tomograph (OCT) and Heidelberg retina tomograph (HRT) 3. SETTINGS AND DESIGN: We included 80 patients with early glaucoma and 80 nonglaucomatous subjects with moderate cup/disc ratio (range of 0.5-0.8) to this cross-sectional study. SUBJECTS AND METHODS: We compared results of color-coded algorithms of HRT 3 (Moorfields regression analysis [MRA] and Glaucoma probability score [GPS]) and OCT. All outputs are classified into three categories: Within normal limits (WNLs), borderline and outside normal limits (ONLs). Diagnostic accuracies of algorithms were determined using the highest sensitivity criteria. RESULTS: The sensitivities of global MRA, GPS and OCT were 0.75, 0.925 and 0.725, respectively, in average disc area group and 0.85, 1.0 and 0.425, respectively, in large disc area group. The specificities of global MRA, GPS and OCT were 0.55, 0.15 and 0.85, respectively, in average disc area group and 0.425, 0.025 and 0.80, respectively, in large disc area group. Area under receiver operating characteristic curve (AUROC) of global MRA, GPS and OCT were 0.667, 0.617 and 0.792, respectively, in average disc area group and 0.746, 0.576 and 0.627, respectively, in large disc area group. AUROC of global MRA and OCT combination in the average and large disc area groups were 0.828 and 0.825, respectively. CONCLUSIONS: In contrast to GPS and OCT algorithms, diagnostic performance of MRA algorithm increased in large disc area group. Combining MRA and OCT algorithms produced satisfactory diagnostic performance in subjects with an average and large disc area.

Endoscopic closure of tracheoesophageal fistulas with the over-the-scope clip system.

Management of Tracheoesophageal Fistulas (TEFs) is associated with high morbidity and mortality and remains an interdisciplinary challenge. We describe the first two cases of successful endoscopic closure of TEFs due to tracheostomy tube and thoracic hydatid cysts surgery, using the Over-The-Scope Clip (OTSC) system. The OTSC system is composed of an application cap, which is mounted onto the distal tip of the endoscope and a connected releasing mechanism, installed on the handle of the scope. The rotation of the handle allows the release of the clip by a two tube sliding mechanism. Atraumatic version of OTSCs with medium sized caps, twin graspers and anchor were used in these cases. Both fistulae were successfully sealed with one clip. No complication was observed that could be ascribed to the clip itself or to the technique. One patient died because of pneumonia and septicemia after 1 week, but the symptoms of other patient were immediately improved. A thoracic radiography taken after 1 month showed that the clip is in place. Although prospective comparative clinical studies are needed to work out the drawbacks of the new OTSC device, it might be considered as a valid alternative to operation in TEFs.

Anterior chamber fixation of a posterior chamber intraocular lens: a novel technique.

We aimed to evaluate the implantation of a posterior chamber intraocular lens (IOL) in the anterior chamber (AC) with the haptics passing through two iridectomies to the posterior chamber. A total of 33 eyes of 33 patients with inadequate posterior capsular support due to either previous aphakia or posterior capsular rupture during cataract extraction were included in the study. A double iridectomy was performed on all patients using a vitrectomy probe on the midperiphery of the iris. IOLs were implanted in the AC, and the haptics were passed through the iridectomies to the posterior chamber. The mean follow-up time was 25.3 months. AC hemorrhage occurred in five patients during the iridectomy procedure. Corneal edema was detected in eight of 14 patients with primary IOL insertions. Haptic dislocation was detected in only one patient. This technique may be a good alternative to scleral-fixated IOL implantation in eyes with aphakia.

Comparison of the effect of intravitreal bevacizumab and intravitreal fasudil on retinal VEGF, TNFα, and caspase 3 levels in an experimental diabetes model.

AIM: To evaluate the influence of an intravitreal injection of bevacizumab and fasudil on the retinal vascular endothelial growth factor (VEGF), tumor necrosis factor alpha (TNFα), and caspase 3 levels in a diabetic rabbit model. METHODS: The study included 6 healthy rabbits (Group 1), 6 rabbits with experimentally induced diabetes mellitus (DM) (Group 2), 7 rabbits with experimentally induced DM to which intravitreal bevacizumab was administered (Group 3), and 7 rabbits with experimentally induced DM to which intravitreal fasudil was administered (Group 4). An intravitreal injection of 1.25mg/50µL bevacizumab in the right eye of rabbits in Group 3 and an intravitreal injection of 0.0064mg/50µL fasudil in the right eye of rabbits in Group 4 were administered on day 21 after the induction of DM. The studied eyes of the rabbits were enucleated three days after the intravitreal injection. The TNFα, VEGF, and caspase 3 levels were determined using the ELISA method. RESULTS: There was a statistically significant difference in the VEGF and caspase 3 levels between groups (P=0.005 and P =0.013, respectively), but the TNFα level did not differ significantly between groups (P=0.792). It was found that VEGF levels were significantly lower in Group 1 and Group 3 than in Group 2 using the Mann-Whitney U test with the Bonferroni correction (P=0.004 for both comparison). There was no statistically significant difference between other groups with regard to VEGF levels (the P value ranged between 0.015 and 0.886). Although the P values of the caspase 3 levels were 0.015 for Group 1 and Group 4, 0.038 for Group 2 and Group 3, and 0.018 for Group 3 and Group 4, these P values remained above the threshold P value of 0.0083, which was the statistically significant level for post hoc tests. CONCLUSION: An intravitreal injection of bevacizumab decreased both the VEGF level, which plays a role in angiogenesis, and the caspase 3 level, which plays a role in apoptosis. Although not as effective as bevacizumab, fasudil had a beneficial effect on the VEGF levels but significantly increased the caspase 3 levels.

Endoscopic management of gastric band erosions: a 7-year series of 14 patients.

BACKGROUND: Intragastric band migration is an unusual but major complication of gastric banding. We review our experience with endoscopic removal of eroded gastric bands. METHODS: We retrospectively evaluated the cases of 110 morbidly obese patients who underwent adjustable gastric banding between 2005 and 2012 to identify those who experienced band erosion. To remove the migrated band, we used an endoscopic approach with a Gastric Band Cutter. RESULTS: Band or tube erosion occurred in 14 patients (12.7%). The median time interval from the initial gastric band placement to the diagnosis of band erosion was 32 (range 18-52) months. Upper abdominal pain, port site infection, loss of restriction and weight regain were the most common symptoms. We used the Gastric Band Cutter to remove the band endoscopically. It was able to cut the band successfully in all but 1 patient, in whom twisting of the cutting wire required conversion from endoscopy to laparotomy. In 2 patients, the band, after being cut, was locked in the gastric wall and required laparotomic removal. In 1 patient, we performed surgery for intragastric penetration of the connecting tube broken close to the band. CONCLUSION: The Gastric Band Cutter was successful in dividing the band in all but 1 patient, although we could not always complete the procedure endoscopically. Endoscopic removal seems to be effective and safe for band erosion.

CONTEXTE: La migration intragastrique de l'anneau est une complication rare, mais majeure du cerclage gastrique. Nous faisons le point sur notre expérience du retrait endoscopique des anneaux gastriques érodés. MÉTHODES: Nous avons évalué de manière rétrospective le cas de 110 patients atteints d'obésité morbide qui ont subi un cerclage gastrique ajustable entre 2005 et 2012 afin de vérifier si les anneaux en place étaient érodés. Pour retirer les anneaux qui avaient migré, nous avons utilisé l'approche endoscopique et un dispositif pour sectionner l'anneau gastrique. RÉSULTATS: L'anneau ou le tube s'est érodé chez 14 patients (12,7 %). L'intervalle médian entre la pose initiale de l'anneau gastrique et le diagnostic d'érosion a été de 32 (entre 18 et 52) mois. La douleur abdominale haute, l'infection du port d'accès, la diminution de la restriction et la reprise de poids ont été les symptômes les plus fréquents. Nous avons utilisé un dispositif pour sectionner l'anneau gastrique afin de retirer l'anneau par voie endoscopique. Le dispositif a permis de sectionner l'anneau avec succès chez tous les patients sauf 1; dans ce dernier cas, une torsion du fil à sectionner a nécessité la conversion de l'endoscopie en une laparotomie. Chez 2 patients, une fois sectionné, l'anneau est resté emprisonné dans la paroi gastrique et a nécessité une extraction laparotomique. Chez 1 patient, nous avons effectué une intervention chirurgicale en raison de la pénétration intragastrique de la tubulure de raccord sectionnée à proximité de l'anneau. CONCLUSION: Le dispositif servant à sectionner l'anneau gastrique a bien fonctionné chez tous les patients sauf 1, même si les interventions n'ont pas toutes pu être entièrement réalisées par voie endoscopique. Le retrait endoscopique semble être une intervention efficace et sécuritaire dans les cas d'érosion de l'anneau.

Hepatitis C virus genotypes in Adana and Antakya regions of Turkey.

BACKGROUND/AIM: Hepatitis C virus (HCV) genotype 1 was found to be dominant in Turkey. In this study, HCV genotypes were examined in the Adana and Antakya regions of Turkey. MATERIALS AND METHODS: The study consisted of 639 HCV-RNA-positive patients with chronic HCV infection in Adana (214 males and 101 females) and Antakya (139 males and 185 females) in Turkey. Real time-polymerase chain reaction was used for genotype determination. RESULTS: In Antakya, it was determined that the percentages of genotypes of type la (0.31%), 1b (86.73%), 2 (9.26%), 3 (0.93%), and 4 (2.78%) were compatible with the nationwide results seen in Turkey. In Adana, the percentages of genotypes of type 1a (3.49%), 1b (55.24%), 2 (14.60%), 3 (26.03%), and 4 (0.63%) were found to be different. This difference was mainly due to the infection rates in males: genotype 1b was significantly lower (42.5% versus 82.2%, P < 0.001) in men in Adana, but genotype 2 (17.8% versus 7.9%, P = 0.021) and genotype 3 (34.6% versus 7.9%, P < 0.001) were significantly higher in men than in women in Adana. CONCLUSION: Rates of genotypes 2 and 3 were unexpectedly high in Adana compared to other parts of Turkey.