Browsing by Author "Temiz, Hakan"

Now showing 1 - 2 of 2

Colonic Malignant Melanoma: F-18-FDG PET/CT Findings
(GALENOS YAYINCILIK, 2018-01-01) Kaya, Eser; Aksoy, Tamer; Guner, Ahmet Levent; Temiz, Hakan; Vardareli, Erkan
Primary malignant melanoma occurs most often in the skin and much less frequently in the choroid layer of the eyes, in the leptomeninges, oral cavity, nasal mucosa, pharynx, esophagus, bronchus, under the nail and vaginal or anorectal mucosa. Primary melanoma of the gastrointestinal tract has been confirmed for lesions occurring in the esophagus, stomach, small bowel, and anorectum through several published reports, as these are the areas where melanocytes normally exist. The occurrence of primary malignant melanoma in the colon is relatively rare, because melanocytes are embryologically absent in the large bowel. Herein we report a patient whose colonic malignant melanoma was diagnosed and disseminated metastatic lesions were revealed with F-18-FDG PET/CT scan. There were multiple nodular lesions showing increased F-18-FDG uptake in both lungs. There was a soft tissue lesion with slightly increased F-18-FDG uptake, which extended to the intraluminal region of the thoracic esophagus. Increased metabolic activity was detected in the asymmetric stomach wall thickening site and in a soft tissue lesion located on the gall bladder wall that was filling the lumen. Multiple hypodense/hyper-metabolic lesions were identified in the liver. Multiple hyper-metabolic polypoid soft tissue lesions were visualized in almost the entire colonic segments. Multiple hyper-metabolic peritoneal implants were noted in all abdominal quadrants. Increased F-18-FDG uptake was detected at the right surrenal gland soft tissue lesion. There was a hyper-metabolic soft tissue lesion on the posterior wall of the rectum. Hyper-metabolic lytic lesions were seen at the thoracal and lumbar vertebrae, left scapula, left iliac bone, sacrum and left femur. There was no evidence of F-18-FDG avid skin lesions in both attenuation corrected and non-corrected images.
Prevalence of hepatitis B and C infections in rheumatoid arthritis and ankylosing spondylitis: A multicenter countrywide study
(AVES, 2014-01-01) Yilmaz, Neslihan; Karadag, Omer; Kimyon, Gezmis; Yazici, Ayten; Yilmaz, Sema; Kalyoncu, Umut; Kasifoglu, Timucin; Temiz, Hakan; Baysal, Birol; Tozun, Nurdan
Objective: Immunosuppressive therapies, especially tumor necrosis factor-a inhibitors, are frequently used in treatment of rheumatoid arthritis (RA) and ankylosing spondylitis (AS). These therapies can induce viral reactivation in concurrent hepatitis B virus (HBV)- or hepatitis C virus (HCV)positive patients. On the other hand, the prevalence of HBV and HCV infections is not exactly known in RA and AS patients. The aim of this study was to investigate the prevalence of HBV and HCV infections in RA and AS patients. Material and Methods: A group of 1517 RA and 886 AS consecutive patients followed by six different rheumatology outpatient clinics of Turkey were recruited in this study. The prevalence of HBV surface antigen (HBsAg) and HCV antibody (anti-HCV) were retrospectively investigated. Results: The mean age was 49.0 +/- 13.2 years in RA and 37.3 +/- 10.5 years in AS patients. HBsAg prevalence was 35 (2.3\%) in RA and 27 (3\%) in AS patients. Anti-HCV prevalence was 17 (1.1\%) and 10 (1.1\%), respectively. In the RA group, both HBsAg and anti-HCV positive patients were older than negative ones (p < 0.05), and the highest prevalence was found in those 60-69 years (p < 0.05). Conclusion: In previous national data, the prevalence of HBsAg has been reported as 3.99\% and shown to increase with age. In this study we have found a lower HBV infection prevalence in both RA and AS patients according to Turkish national data. This result may explain by being younger age of our patients. In another conclusion, lower prevalence could be related to, joint complaints may less consulted to Rheumatologist in HBV positive.