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Articles by M. Ozgur OZYIGIT
Total Records ( 5 ) for M. Ozgur OZYIGIT
  Ahmet AKKOC , A. Levent KOCABIYIK , M. Ozgur OZYIGIT , I. Taci CANGUL , Rahsan YILMAZ and Cuneyt OZAKIN
  Burkholderia cepacia and Aeromonas hydrophila infections are described in an African Grey Parrot (Psittacus erithacus erithacus) that presented with neurological signs, lassitude, and respiratory distress. At postmortem examination, subperiosteal ecchymotic hemorrhages in the skull, and severe subcutaneous edema in the neck and abdomen were prominent. Round, disseminated, whitish necrotic foci were noted in the congested liver. Microscopic examination revealed chromatolysis in brain neurons. Multifocal coagulation necroses were found in the liver. Non-purulent, subacute myocarditis, thromboembolic nephritis, and interstitial pneumonia were observed. Microbiological examination revealed mixed cultures of Burkholderia cepacia and Aeromonas hydrophila in brain, lung, liver, kidney, and heart samples.
  Ahmet AKKOC , Rahsan YILMAZ , I. Taci CANGUL and M. Ozgur OZYIGIT
  Fatal pulmonary aspergillosis and AA type amyloid accumulations in the liver and spleen are described in a female ostrich (Struthio camelus). The animal had had respiratory problems and long-term inappetence over an 8-week period. Necropsy revealed that several soft, grayish to white nodules ranging from 1 to 3 mm in diameter were scattered throughout the lungs and thoracic air sacs. Prominent enlargement of the liver and spleen was observed. No gross lesions were found in the other organs studied. The microscopic examination showed severe, necrotizing, granulomatous pneumonia, and air sacculitis. Aspergillus fumigatus was recovered from the lungs and air sacs as pure culture colonies. Amyloid deposition was demonstrated in the liver and spleen slides by Congo red and immunohistochemistry. To the authors’ knowledge, to date no case of amyloid accumulation in ostrich has been reported. We report, for the first time, diffuse AA amyloidosis in the liver and spleen of an ostrich, probably occurring secondary to aspergillosis.
  Ahmet AKKOC , I. Taci CANGUL and M. Ozgur OZYIGIT
  This report describes a case of multicentric intrahepatic biliary cystadenoma observed in a 13-year-old, male, Irish setter dog. The dog had a history of chronic inappetence, weight loss, intermittent icterus, and diarrhoea. In the ultrasonographic examination of the abdominal organs, 5 spherical masses were found in various liver lobes. The largest mass was 12 cm in diameter and was located on the quadrate lobe. It had spongy consistency and had several cystic structures, 3 mm-2.5 cm in diameter, on the cut surface. While this mass bulged through the normal outline of the liver, smaller masses were engraved within the liver parenchyma. Histopathologically, cystic glandular structures lined by cubical to columnar epithelial cells were observed. Immunohistochemically, tumoural cells stained positively with anti-cytokeratin 7 and anti-cytokeratin 19 antibodies. We report herein a rare case of multicentric biliary cystadenoma in an Irish setter dog with histopathological and immunohistochemical findings.
  Rahsan YILMAZ , Ahmet AKKOC and M. Ozgur OZYIGIT
  In the present study, an ileal leiomyoma encountered in a captive zebra ((Equus burchelli) was reported. A 29-year-old, female zebra was found dead in the Bursa zoo. According to the referring veterinarian the most prominent clinical signs were intermittent colic (responsive to analgesics) and constipation. At post mortem examination, abdomen was severely distended. A firm, multilobular, well vascularized and encapsulated tumoural mass, 12 cm in diameter, embedded into the proximal part of the ileum wall, and protruded from the serosal surface was found. The cut section of the mass had whorled appearance, pale yellow to white in colour, and had no sign of coagulation necroses and haemorrhages. In the microscopical examination, it was observed that tumoural mass consisted of interlacing bundles of well-differentiated, haphazardly arranged, and smooth muscle cells. Mitotic figures were not common. Immunohistochemically, neoplastic cells were stained strongly with alpha smooth muscle actin and the mass was diagnosed as leiomyoma.
  Deniz NAK , Aylin ALASONYALILAR DEMIRER , Bilginer TUNA , Yavuz NAK and M. Ozgur OZYIGIT
  A 4-year old, primiparous, female Anatolian Shepherd dog was presented for evaluation of type II vaginal prolapse with alopecia of the left perineal skin. Hematological analyses demonstrated leukocytosis and thrombocytopenia. Estradiol (E2) and progesterone (P4) levels were 156 pg/mL and 2.3 ng/mL, respectively. The vaginal smear was predominantly (at least 80%) made up of anuclear superficial cells. An abdominal ultrasonography revealed a heterogeneous multicystic mass with anechoic areas adjacent to the caudal pole of the left kidney. An ovariohysterectomy was performed. Ten days after the surgery, the prolapsed vagina was completely regressed. A histopathological examination of the ovarian mass demonstrated that it was a granulosa cell tumor.
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