Kayıhan Akın

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Pregnancy-like (pseudolactational) hyperplasia: uncommon cause of microcalcifications and mass in two cases

Jbr-btr, 2013

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Diffusion Weighted MRI of Creutzfeldt Jakob Disease

Primary appendicealtumors: clinical imaging and pathological findings. Report of four cases

PubMed, Jun 28, 2011

Primary appendiceal tumors are rare clinical and radiological entities. We report 4cases includin... more Primary appendiceal tumors are rare clinical and radiological entities. We report 4cases including muscinous cystadenoma associated with pseudomyxoma peritonei, muscinous cystadenoma associated with mucocele, low-grade muscinous neoplasia associated with appendicitis in elderly patients, and carcinoid tumor associated with appendicitis in a young adult.

Association between gamma-glutamyltransferase and coronary artery calcification

International Journal of Cardiology, Aug 1, 2013

Background Serum gamma-glutamyltransferase (GGT) has been associated with albuminuria in diabetes... more Background Serum gamma-glutamyltransferase (GGT) has been associated with albuminuria in diabetes patients, but it has not been investigated in the general population. We aimed to investigate the association between serum GGT and albuminuria in the nondiabetic Korean population with normal kidney function. Methods Study participants (3948; 1549 men and 2399 women) with an estimated glomerular filtration rate C60 mL/min/1.73 m 2 were analyzed from the fifth Korean National Health and Nutrition Examination Survey (2011). Albuminuria was defined as an albumin-creatinine ratio [30 mg/g. Serum GGT was analyzed by dividing into quartiles. Multiple logistic models were used to analyze the associations between GGT and albuminuria. Results The prevalence of albuminuria was 5.1% and increased linearly according to increasing GGT quartiles (P for trend = 0.005). A linear regression analysis revealed that GGT was positively related with albuminuria (P = 0.008). After adjusting for confounding factors, the odds ratio for albuminuria was 1.80 (95% CI 1.079-3.010, P for trend = 0.029) for the highest quartile group compared with those observed in the lowest quartile of GGT. In addition, this independent relationship did not change when the cutoff value of GGT (30 IU/L) was applied to this analysis. Compared with GGT value B30 IU/L, the adjusted odds ratio of albuminuria in participants with GGT [30 IU/L was 1.96 (95% CI 1.319-2.906, P \ 0.001). Conclusion Higher serum GGT levels within the reference range were significantly associated with albuminuria in nondiabetic Koreans with preserved kidney function, independently of traditional cardio-renal risk factors.

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Two foreign body reactions caused by suture materials: mammograms mimic cancer as a speculated lesion

Jbr-btr, 2013

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Findings. report of four cases

Jbr-btr, Feb 2, 2011

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Boğulmuş Kasık Fıtığını Taklit Eden Inguinal Endometriozis

Although endometriosis is a common gynecological condition in women of reproductive ages, inguina... more Although endometriosis is a common gynecological condition in women of reproductive ages, inguinal region has been rarely reported as a localization of this disease. A 35-year-old woman was admitted to emergency room with a complaint of painful swelling in her right groin. On examination, a tender and irreducible mass, suspected an incarcerated inguinal hernia, was found at the medial to the deep inguinal ring. When the patient was questioned in detail, it was determined that her complaints showed exacerbation during the menstrual periods. In addition, she had a past history of laparoscopic excision for a pelvic endometrioma five years ago. Ultrasonography and magnetic resonance imaging revealed a semi-solid lesion with irregular boundaries in the right groin. At operation, a brownish irregular mass attached to the round ligament was totally excised, and then the defect was closed with using a polypropylene mesh. Histologically, the excised lesion was diagnosed as endometrioma. Alth...

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Effect of Preprocessing and Loss Functions on a Novel Dataset: An Application on MRI-Based Prostate Lesion Segmentation using U-Net

Prostate cancer is one of the riskiest types of cancer, while it is the second most common type o... more Prostate cancer is one of the riskiest types of cancer, while it is the second most common type of cancer in men and it is likely to result in death. While the diagnosis of prostate cancer is vital, it is complex, time-consuming, and the technologies used in its diagnosis are limited. The need for high technology for the diagnosis of prostate cancer is increasing day by day. One of the technologies used in health nowadays is artificial intelligence. Therefore, artificial intelligence-supported decision support systems should be used in the diagnosis of prostate cancer. However, the number of studies using artificial intelligence for the diagnosis of prostate cancer is limited. One of the most important reasons for this is the fewness of open-source data sets. Therefore, in this study, a novel MRI data set was created by an expert radiologist. The U-Net model was trained and tested using this data set. Different preprocessing methods and loss functions were studied for the training o...

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Doppler sonography of hemodynamic changes of the celiac artery in chronic active gastritis

Turkish Journal of Medical Sciences

In this study, we determined how Doppler parameters of the celiac artery (CA) are affected in pat... more In this study, we determined how Doppler parameters of the celiac artery (CA) are affected in patients with chronic gastritis. Materials and methods: We examined 23 patients (group 1) with chronic active gastritis (diagnosed by endoscopy and histology) and 19 asymptomatic control subjects (group 2) with duplex Doppler ultrasonography. The patient group (group 1) was classified in 2 subgroups according to the severity of the inflammation. The second classification was done according to the presence of the Helicobacter pylori infection within group 1. Mean peak systolic velocity (PSV), enddiastolic velocity (EDV), resistive index (RI), and pulsatility index (PI) of the CA were compared. Results: The mean PSV and the mean EDV were significantly lower in patients than in controls (P < 0.05). The mean PI and the mean RI were higher in the patient group than in the controls. However, these differences were not statistically significant (P > 0.05). Conclusion: In this preliminary study, patients with chronic active gastritis, regardless of the degree of the inflammation and the presence of H. pylori, were associated with a decrease in CA flow velocities that could be seen on Doppler sonography. These data might be useful in understanding the pathophysiology of gastritis and lead the way for future studies.

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Ovarian Fibroma as a Possible Cause of Fever of Unknown Origin

Gynecology Obstetrics and Reproductive Medicine, 2016

Fibromas are the most common benign solid tumors of the ovary. Clinically, they are asymptomatic ... more Fibromas are the most common benign solid tumors of the ovary. Clinically, they are asymptomatic and preoperative diagnosis is often difficult. In this paper we report a case of fibroma as a cause of fever of unknown origin (FUO). A 26-year-old woman referred to our hospital with a one-month history of intermittent fever. Ultrasonography as well as pelvic computed tomography scans showed a hypoechoic appearance in the right adnexal region which was diagnosed as pyosalpinx, in the light of clinical setting. Pus drainage was then planned but 3cc of serous material was drained from the adnexal mass with ultrasound-guide. Despite antibiotic therapy, her fever continued. She had a comprehensive work-up for FUO, including rheumatologic, infectious, and malignant etiologies. Magnetic resonance imaging (MRI) scans of the pelvis showed two well defined ovarian lesions, which were suggestive of an ovarian fibroma. MRI findings that are suggestive of gynecological infectious diseases were not ...

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Growth of the lateral ventricle in normal second-trimester fetuses: Is a nomogram practical?

Journal of Pediatric Neuroradiology, 2015

The purpose of this study was to determine the growth of lateral ventriclar size of fetuses betwe... more The purpose of this study was to determine the growth of lateral ventriclar size of fetuses between 15 and 25 weeks of gestation. A prospective study of normal singleton pregnancies was evaluated consecutively. Measurement of the lateral ventricle was performed by transabdominal sonography as a part of routine obstetric examination in 338 fetuses. The mean size of the lateral ventricular atrial diameter for the 338 fetuses was 6.65 ± 0.95 mm. A weak correlation was found between gestational age and lateral ventricle width (R2 = 0.03, P

Radyolojik Açıdan Sjögren Sendromu

Turkiye Klinikleri Journal of Rheumatology Special Topics, 2012

Acute Cholecystitis with Granulomatous Hepatitis as Atypical Clinic Presentation of Brucellosis: Case Report and Review of Literature

Turkiye Klinikleri Journal of Gastroenterohepatology, 2012

Brucellosis is a zoonotic infection transmitted from animal to human. The infection is endemic in... more Brucellosis is a zoonotic infection transmitted from animal to human. The infection is endemic in many countries, mainly in the Mediterranean basin, the Middle East, India, parts of south and central America and east and western Africa. Human brucellosis is a multisystemic infection caused by species of Brucella that produces a wide spectrum of clinical symptoms.The most common gastrointestinal complication is granulomatous hepatitis. Acute cholecystitis due to Brucella species is a very rare manifestation. Here we report the case of a 35-year-old male with acute cholecystitis and hepatic mass like granuloma caused by Brucella spp and a review of previously reported cases.

Epicardial adipose tissue and pericoronary fat thickness measured with 64-multidetector computed tomography: potential predictors of the severity of coronary artery disease

Clinics, 2014

The aim of the present study was to investigate the relationship between pericoronary fat and the... more The aim of the present study was to investigate the relationship between pericoronary fat and the severity and extent of atherosclerosis, quantified using 64-multidetector computed tomography, in patients with suspected coronary artery disease. METHODS: The study population consisted of 131 patients who were clinically referred for noninvasive multislice computed tomography coronary angiography for the evaluation of coronary artery disease. Patients were classified as follows: no atherosclerosis, Group 1; nonobstructive atherosclerosis (luminal narrowing ,50% in diameter), Group 2; and obstructive atherosclerosis (luminal narrowing $50%) in a single vessel or obstructive atherosclerosis in the left main coronary artery and/or multiple vessels, Group 3. Epicardial adipose tissue was defined as the adipose tissue between the surface of the heart and the visceral layer of the pericardium (visceral epicardium). Epicardial adipose tissue thickness (mm) was determined in the right ventricular anterior free wall. The mean thickness of the pericoronary fat surrounding the three coronary arteries was used for the analyses. RESULTS: The average thickness over all three regions was 13.2 ¡ 2.1 mm. The pericoronary fat thickness was significantly increased in Group 3 compared with Groups 2 and 1. The epicardial adipose tissue thickness was significantly increased in Group 3 compared with Groups 2 and 1. A receiver operating characteristic curve for obstructive coronary artery disease was assessed to verify the optimum cutoff point for pericoronary fat thickness, which was 13.8 mm. A receiver operating characteristic curve for obstructive coronary artery disease was also assessed to verify the optimum cutoff point for epicardial adipose tissue, which was 6.8 cm. CONCLUSION: We showed that the epicardial adipose tissue and pericoronary fat thickness scores were higher in patients with obstructive coronary artery diseases.

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Autologous blood injection to the temporomandibular joint: magnetic resonance imaging findings

Imaging Science in Dentistry, 2012

Purpose : The aim of this study was to investigate the effect of the autologous blood injection (... more Purpose : The aim of this study was to investigate the effect of the autologous blood injection (ABI) for chronic recurrent temporomandibular joint (TMJ) dislocation using magnetic resonance imaging (MRI). Materials and Methods : ABI was applied to 14 patients who had chronic recurrent TMJ dislocation. MRIs of the patients were taken and compared before and one month after the injection. Results : All of the patients had no dislocations of their TMJs on clinical examination one month after the injection. In the pre-injection, unilateral or bilateral TMJ dislocations were observed on MRIs in all patients. One month after the injection, TMJ dislocations were not observed in MRI evaluation of any patients. A significant structural change that caused by ABI was not observed. Conclusion : The procedure was easy to perform and it caused no foreign body reaction. However, it was unclear how the procedure prevented the dislocation. (Imaging Sci Dent 2012; 42 : 13-8

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The Utility of Special Radiological Signs on Routinely Obtained Supine Anteroposterior Chest Radiographs for the Early Recognition of Neonatal Pneumothorax

Neonatology, 2013

Background: Bedside chest radiographs used for the confirmation of diagnosis of pneumothorax in t... more Background: Bedside chest radiographs used for the confirmation of diagnosis of pneumothorax in the neonatal intensive care unit (NICU) are routinely obtained in the supine position. However, pneumothoraces may not appear in the classically described forms on these radiographs, resulting in a delayed diagnosis. Objective: To assess the utility of special radiological signs in the neonatal population for the early recognition of pneumothorax. Methods: A case-control study was conducted at a level III referral center from January 2006 to December 2012. For each neonate with pneumothorax, one infant was selected for the control group. A senior radiologist and neonatologist experienced in reading chest radiographs evaluated each radiograph for the presence of special radiological signs. Results: Of the 1,375 infants admitted to the NICU during the study period, 39 had a pneumothorax. A total of 223 radiographs were scored and 46% of the neonates were found to have occult pneumothoraces ...

Angel Wing Sign in a Neonate with Pneumomediastinum

The Journal of Pediatrics, 2013

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Inborn Errors of Metabolism Presenting in Childhood

Journal of Neuroimaging, 2011

Neurodegenerative and neurometabolic disorders may cause significant morbidity and mortality in c... more Neurodegenerative and neurometabolic disorders may cause significant morbidity and mortality in children. Imaging is important in early diagnosis of metabolic disorders and in determining the extent of brain injury. Especially after the development of new techniques such as diffusion-weighted magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS), neuroimaging plays more important role in the diagnosis and management of these disorders. In these disorders, usually a mutation causes a clinically significant block in one or more metabolic pathways. This blockage usually results in either a deficiency of the product or in an accumulation of substrate with damage induced by either storage or toxicity. The presenting symptoms are usually nonspecific. In some of the metabolic disorders, long-term dietary or medical treatment options are available, and to make an early diagnosis in these disorders is important before the brain damage occurs. Prompt diagnosis, particularly in treatable disorders, is crucial to prevent neurological sequelae or death. If treatment is indeed available, neuroimaging also provides a baseline in evaluation of the efficacy of treatment. Therefore, the neuroradiologist should be aware of these disorders to prevent devastating results of delayed diagnosis. Metabolic disorders affecting the central nervous system, both gray and white matter can be classified by involvement of the primary cellular organelle as lysosomal, peroxisomal, mitochondrial disorders, or biochemical classification can be made as amino acid and organic acid metabolism defects or primary white matter disorders. This article presents the neuroimaging features of relatively more common metabolic disorders.

Neuroimaging in Metabolic Disorders

Journal of Neuroimaging, 2011

Although genetic and chemical studies are most helpful for the diagnosis of metabolic disorders o... more Although genetic and chemical studies are most helpful for the diagnosis of metabolic disorders of the brain, there is a role for neuroimaging to quantify the degree of brain involvement and the response to therapy. Also, in some instances the imaging pattern can guide in the selection of genes or gene products to be studied.

Response letter to 'Uric acid: A crucial marker of coronary artery calcium score?

International Journal of Cardiology, 2013

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Pregnancy-like (pseudolactational) hyperplasia: uncommon cause of microcalcifications and mass in two cases

Jbr-btr, 2013

Download

Diffusion Weighted MRI of Creutzfeldt Jakob Disease

Primary appendicealtumors: clinical imaging and pathological findings. Report of four cases

PubMed, Jun 28, 2011

Association between gamma-glutamyltransferase and coronary artery calcification

International Journal of Cardiology, Aug 1, 2013

Download

Two foreign body reactions caused by suture materials: mammograms mimic cancer as a speculated lesion

Jbr-btr, 2013

Download

Findings. report of four cases

Jbr-btr, Feb 2, 2011

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Boğulmuş Kasık Fıtığını Taklit Eden Inguinal Endometriozis

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Effect of Preprocessing and Loss Functions on a Novel Dataset: An Application on MRI-Based Prostate Lesion Segmentation using U-Net

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Doppler sonography of hemodynamic changes of the celiac artery in chronic active gastritis

Turkish Journal of Medical Sciences

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Ovarian Fibroma as a Possible Cause of Fever of Unknown Origin

Gynecology Obstetrics and Reproductive Medicine, 2016

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Growth of the lateral ventricle in normal second-trimester fetuses: Is a nomogram practical?

Journal of Pediatric Neuroradiology, 2015

Radyolojik Açıdan Sjögren Sendromu

Turkiye Klinikleri Journal of Rheumatology Special Topics, 2012

Acute Cholecystitis with Granulomatous Hepatitis as Atypical Clinic Presentation of Brucellosis: Case Report and Review of Literature

Turkiye Klinikleri Journal of Gastroenterohepatology, 2012

Epicardial adipose tissue and pericoronary fat thickness measured with 64-multidetector computed tomography: potential predictors of the severity of coronary artery disease

Clinics, 2014

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Autologous blood injection to the temporomandibular joint: magnetic resonance imaging findings

Imaging Science in Dentistry, 2012

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The Utility of Special Radiological Signs on Routinely Obtained Supine Anteroposterior Chest Radiographs for the Early Recognition of Neonatal Pneumothorax

Neonatology, 2013

Angel Wing Sign in a Neonate with Pneumomediastinum

The Journal of Pediatrics, 2013

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Inborn Errors of Metabolism Presenting in Childhood

Journal of Neuroimaging, 2011

Neuroimaging in Metabolic Disorders

Journal of Neuroimaging, 2011

Response letter to 'Uric acid: A crucial marker of coronary artery calcium score?

International Journal of Cardiology, 2013

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