1.Preoperative and Postoperative Factors Affecting Functional Success in Anatomically Successful Retinal Detachment Surgery
Mehmet Eren GUNER ; Melis Kabaalioglu GUNER ; Zafer CEBECI ; Nur KIR
Korean Journal of Ophthalmology 2022;36(6):477-485
Purpose:
To investigate preoperative and postoperative factors affecting functional success in anatomically successful retinal detachment surgery.
Methods:
Seventy-five eyes of 75 patients with rhegmatogenous retinal detachment who underwent anatomically successful surgery from 2014 to 2019 with more than 1 year follow-up were included in the study. Demographic characteristics, ocular examination findings, preoperative and postoperative spectral domain optic coherence tomography images were retrospectively evaluated.
Results:
The mean age was 53.9 ± 17 years (range, 11–85 years). The mean follow-up period was 36.7 ± 16 months (range, 14–72 months). The mean best-corrected visual acuity of the patients before surgery was 1.35 ± 1.24 and at postoperative 12 months was 0.66 ± 0.5 logarithm of the minimum angle of resolution. Patients who were operated in 7 days of visual symptoms onset were found to have better visual acuity at the first and subsequent postoperative exams. Preoperative proliferative vitreoretinopathy, vitreous hemorrhage, and extent of retinal detachment were found to have a negative effect on functional success at 12 months. Regeneration of the outer retinal layers had a positive effect on visual acuity at 12 months but did not significantly increase visual acuity after 12 months. Multivariate analysis showed that preoperative external limiting membrane integrity was significantly associated with better functional outcomes.
Conclusions
Early intervention, presence of preoperative external limiting membrane integrity, and restoration of postoperative outer retinal layers positively affected functional success. The presence of preoperative vitreous hemorrhage, preoperative proliferative vitreoretinopathy, and the extent of retinal detachment had a negative effect on prognosis at 12 months.
2.Reliability of Fossae Lumbales Laterales and Pelvic Incidence for Estimating Transsacral Corridors Assessed Using Reconstruction Computed Tomography
Orhan BALTA ; Mehmet Akif YILMAZ ; Kürşad AYTEKIN ; Recep KURNAZ ; Harun ALTINAYAK ; Mehmet Burtaç EREN ; Eyüp Çağatay ZENGIN
Clinics in Orthopedic Surgery 2022;14(3):417-425
Background:
The present study aimed to evaluate the effect of fossae lumbales laterales and pelvic incidence (PI) on transsacral corridors.
Methods:
Patients who underwent pelvic computed tomography (CT) during routine therapy in a single center between 2015 and 2020 were retrospectively reviewed. The patients’ age and sex were documented during CT examination. Measurements were performed for both the upper and second sacral segments. Height and weight of the patients were determined using appropriate tools and body mass index (BMI) was calculated. Transsacral corridors were identified in true coronal and true sagittal planes and their width was determined as the maximum gap measured so that no screws could come out of the transacral corridors. PI was measured.
Results:
Our study included 244 (57%) male and 184 (43%) female patients, who had a mean age of 49.3 ± 14.15 years (range, 18–89 years) and a mean BMI of 26.57 ± 2.38 kg/m 2 . No statistically significant correlation was found between the detection of the dimple sign in physical examination and the presence of an adequate corridor. The PI was statistically significantly higher in the patients with dimples (p < 0.001). PI of the female patients was higher than that of the male patients (p = 0.026). The correlation between PI and the existence of adequate corridors for S1 and S2 screws was not statistically significant (p = 0.858 and p = 0.129, respectively). On the relationship between the presence of adequate S1 and S2 corridors where transsacral screws could be sent, an inverse relationship was detected: if the S1 transsacral corridor was adequate, the S2 corridor was inadequate or vice versa.
Conclusions
We could not obtain meaningful results on the use of the dimples of Venus or PI instead of CT to evaluate the adequacy of transverse corridors. Nevertheless, we confirmed that an increased PI was associated with the presence of dimples of Venus.
3.MMP-2, TIMP-2 and CD44v6 expression in non-small-cell lung carcinomas.
Bulent EREN ; Mehmet SAR ; Buge OZ ; Fazilet H Oner DINCBAS
Annals of the Academy of Medicine, Singapore 2008;37(1):32-39
INTRODUCTIONFactors that emerge as crucial participants in tumour invasion and metastases are matrix metalloproteinases (MMPs), tissue inhibitor of metalloproteinase (TIMP) inhibitors and cellular adhesion molecules (CD44 and similar molecules). They play important roles in tumour invasion and metastasis in non-small-cell lung carcinomas (NSCLCs).
MATERIALS AND METHODSThe study was performed using the data of 33 patients. MMP-2 from the metalloproteinase family, TIMP-2 from the metalloproteinase inhibitor family and the adhesion molecule CD44v6 expression were investigated immunohistochemically to search their role in the metastasis and the clinical outcome of the patients with NSCLCs.
RESULTSTwenty-three tumours (70%) were squamous cell carcinoma (SCC), 9 (27%) were adenocarcinoma (AC), and 1 (3%) was large cell carcinoma (LCC). MMP-2 and TIMP-2 were expressed in high rates in NSCLC but CD44v6 expression was about 50%. Lymphatic invasion was less frequent in TIMP-2- positive patients and this difference was statistically significant (P = 0.005). There was a statistically significant difference between SCCs and ACs with respect to CD44v6 tumoral expression (P = 0.004). Also, there was a negative correlation between lymphatic invasion and the extent of CD44v6; lymphatic invasion was significantly less in CD44v6-positive cases (P = 0.013).
CONCLUSIONWe found that TIMP-2 and CD44v6 can decrease the lymphatic invasion in NSCLCs. Also there was observed histiotype-related pattern of CD44v6 variant expression in SCCs.
Adult ; Aged ; Aged, 80 and over ; Biomarkers, Tumor ; Carcinoma, Non-Small-Cell Lung ; enzymology ; pathology ; Female ; Humans ; Hyaluronan Receptors ; metabolism ; Immunohistochemistry ; Male ; Matrix Metalloproteinase 2 ; metabolism ; Middle Aged ; Tissue Inhibitor of Metalloproteinase-2 ; metabolism
5.Acute myocardial infarction after capecitabine treatment: not always vasospasm is responsible.
Tolga Sinan GÜVENÇ ; Emel CELIKER ; Kazim Serhan OZCAN ; Erkan ILHAN ; Mehmet EREN
Chinese Medical Journal 2012;125(18):3349-3351
Capecitabine is an orally available chemotherapeutic agent that is converted to 5-fluorouracil (5-FU) after absorbtion. Capecitabine and its active metabolite, 5-FU, have cardiotoxic effects with reported instances of acute coronary syndromes caused due to coronary vasospasm. However, these agents exert toxic effects on cardiovascular system and beyond vasospasm provacation. We report a 46-year-old patient diagnosed as acute inferior infarction who is treated with capecitabine for 3 months due to metastatic breast carcinoma, in whom thrombotic coronary occlusion was observed in angiography. This case demonstrates that apart from vasospasm, coronary thrombosis could be observed after capecitabine treatment, with a possible direct effect of this drug.
Capecitabine
;
Coronary Thrombosis
;
chemically induced
;
Coronary Vasospasm
;
chemically induced
;
Deoxycytidine
;
adverse effects
;
analogs & derivatives
;
therapeutic use
;
Female
;
Fluorouracil
;
adverse effects
;
analogs & derivatives
;
therapeutic use
;
Humans
;
Middle Aged
;
Myocardial Infarction
;
chemically induced
6.The relation between insulin resistance determined by homeostatic corrected from haemostatic modelling and slow coronary flow.
Zekeriya NURKALEM ; Ahmet L ORHAN ; Ahmet T ALPER ; Huseyin AKSU ; Murat OZDAMAR ; Nevzat USLU ; Sevket GORGULU ; Hakan HASDEMIR ; Mehmet SARGIN ; Mehmet EREN
Annals of the Academy of Medicine, Singapore 2008;37(3):188-191
INTRODUCTIONIn this study, we sought to determine whether insulin resistance, which is investigated by homeostatic modelling, is related to slow coronary flow (SCF).
MATERIALS AND METHODSA total of 24 patients with SCF (4 females/20 males, mean age 47 +/- 12 years) and 32 patients with normal coronary artery (10 females/22 males, mean age 52 +/- 12 years) were included in the study. Baseline glucose, insulin and plasma lipid levels were measured. A standard oral glucose tolerance test (OGTT) was performed and post-challenge insulin levels were also measured. The index of insulin resistance was calculated with the homeostatic modelling [homeostatic model assessment for insulin resistance index (HOMA-IR)].
RESULTSThere were no differences between the 2 groups with regard to age, lipid levels, blood pressure levels, history of smoking, fasting and post-challenge plasma glucose. Baseline insulin levels were augmented in the SCF group (9.64 +/- 5.93 vs 7.04 +/- 3.26, P = 0.041). HOMA-IR levels were not different between the study groups (2.20 +/- 1.44 vs 1.69 +/- 0.86, P = 0.129). Manifest insulin resistance was significantly higher in the CSF group as compared with the control group (25% vs 3%, P = 0.01).
CONCLUSIONManifest insulin resistance is seen more frequently in patients with SCF.
Blood Flow Velocity ; Blood Glucose ; analysis ; Blood Pressure ; Body Mass Index ; Coronary Circulation ; physiology ; Female ; Glucose Tolerance Test ; Homeostasis ; Humans ; Insulin ; blood ; Insulin Resistance ; physiology ; Lipids ; blood ; Male ; Middle Aged ; Models, Biological