M.Özgür ÖZYİĞİT, Yavuz NAK, Sevda İNAN, Özkan YAVAŞ

Bir Simental İnekte Rektal Fibromatozis

Bu olayda 4 yaşlı Simental ırkı inekte rektum bölgesinde gözlenen çok sayıdaki tümöral kitlelerden dolayı rektal muayeneyi zorlaştıran ve operasyonuna karar verilen fibromatozis olgusunun klinik ve patolojik yönden incelenmesi amaçlandı. Hayvanda doğumu izleyen dönemde rektal muayene yapılmak istendiğinde rektum çevresinde zamanla sayı ve hacimleri artan kitleler gözlendi. En büyüğü 6,5 cm çapında yuvarlak ve 4x3x1,4cm büyüklüğünde oval, çeşitli büyüklükte 14 adet katı esnek kıvamda, beyaz renkli kitlelere rastlandı. Kitlelerin bazıları deri ve çoğunlukla mukoza ile kaplı olduğu dikkati çekti. %10’luk tamponlu formaldehit ile tespit edilerek parafine gömülen ve 5 µm kalınlığında kesitler alınan dokular, Hematoksilen-Eosin (H-E) ve Van Gieson ile ayrıca immunohistokimyasal (İHK) olarak sitokeratin ve vimentin ile boyandı. H-E kesitli dokulardaki tümöral kitlenin tipik anafor tarzında yerleşmiş fibroblast ve fibrositlerden oluştuğu, yapılan İHK boyamada ise vimentin pozitif ve sitokeratin negatif olarak gözlendi. Bu olgudaki gözlenen makroskobik, mikroskobik ve İHK’sal bulgular kaudal rektumda fibromatozis olgusu ile uyumlu bulunmuştur

Rectal fibromatosis in a Simmental cow

In this case, it was aimed to investigate the clinical and pathological aspects of fibromatosis which make difficult rectal examination due to multiple tumoral masses observed in a 4-year-old Simmental–breed at rectum. Period of after the birth, the masses were seen around the rectal area of the cow when rectal examination was carried out. The number and volume of masses increased with time.The shapes of masses were round and oval and the largest size were 6.5 cm in diameter and 4 x 3 x 1.4 cm respectively. Totally 14 masses, covered with skin and mucosal membrane were found. Cut surface were whitish colored and solid-flexible in consistency. The tissues were fixed with 10% buffered formaldehyde and embedded in paraffin and sections with a thickness of 5 μm were stained with hematoxylen-eosin (H&E) and Van Gieson and immunohistochemical (IHC) with cytokeratin and vimentin.Tumor tissue in H&E sections consisted of fibroblasts and fibrocytes located in the typical herringbonepattern. Tumoral cells were vimentin-positive and cytokeratin-negative in IHC staining.Macroscopic, microscopic and IHC findings, in this case, were found to be consistent with the presence of fibromatosis in the caudal rectum.

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