Rahşan Yilmaz

Cardiac metastasising rhabdomyosarcoma in a great Dane

perineal area and skin of dogs (Kim and others 1996, Kuwamura and others 1998, Lascelles and others 1998, Barnhart and Lewis 2000, Ueno and others 2002, Machida and others 2003, Brockus and Myers 2004). Dissemination to the lymph nodes, lungs, heart, liver, spleen, adrenal glands and kidneys has been reported (Ware 2001). In the present case there were metastases in various organs. A combination of haematoxylin and eosin, immunohistochemistry, PTAH and PAS staining is used to differentiate Cardiac metastasising rhabdomyosarcoma in a great Dane

Expression of matrix metalloproteinases in Marek's disease tumours

Mareks disease is an important lymphoproliferative neoplasm of chickens, caused by oncogenic strains of herpes virus. Visceral lymphomas and invasion of both central nervous tissues and peripheral nerves by lymphoid cells are common findings. Matrix metalloproteinases (MMPs) are a group of enzymes responsible for extracellular matrix degradation and tumour metastases. The localisations of MMPs in tumour cells were evaluated immunohistochemically. As a result, positive reactions for MMP-9 and MMP-2 enzymes were found in the lymphoid tumour cells. These enzymes may take part in the pathogenesis of Mareks disease causing extracellular matrix degradation and metastasis.

Mast cell typing in aortic onchocerciasis and the immunohistochemicaldemonstration of Wolbachia bacteria

Rahşan YILMAZ*, Melek KOÇAK, Zafer ÖZYILDIZ, İsmail Şah HAREM Department of Pathology, Faculty of Veterinary Medicine, Harran University, Şanlıurfa, Turkey Department of Histology and Embryology, Faculty of Veterinary Medicine, Namık Kemal University, Tekirdağ, Turkey Department of Pathology, Faculty of Veterinary Medicine, Mehmet Akif Ersoy University, Burdur, Turkey Department of Histology and Embryology, Faculty of Veterinary Medicine, Harran University, Şanlıurfa, Turkey