RESUMODentre as enfermidades que acometem a genitália externa de touros, a acropostitefimose merece destaque. Em alguns casos, pode-se diagnosticar severo comprometimento da mucosa do folheto prepucial interno o que pode inviabilizar a cirurgia. Dentre as complicações, quando se opta pelo ato operatório, o comprometimento da extremidade livre do pênis não tem sido apontado como sequela frequente. Este trabalho objetiva descrever os achados clínicos e histopatológicos, de um caso incomum de estenose e fibrose do folheto prepucial interno com consequente necrose da extremidade livre do pênis, como intercorrência após a cirurgia de acropostite-fimose. Durante o procedimento foram colhidos fragmentos das áreas lesionadas para exame histopatológico. Não foi possível efetuar a correção cirúrgica da fimose prepucial, sendo a amputação de um segmento peniano necessária. O procedimento foi respaldado pelos achados histopatológicos, confirmando a gravidade do caso. O laudo histopatológico revelou glande com áreas focalmente extensas e superficiais de necrose, dentre outros achados. PALAVRAS-CHAVE: Bovinos, genitália externa, impotência coeundi, reprodutores. NECROSIS OF THE FREE END OF THE PENIS AS COMPLICATION OF ACROPOSTITIS-PHIMOSIS IN BULLABSTRACT Among the diseases that affect the external genitalia of bulls the acropostitephimosis deserves emphasi. In some cases can be diagnosed severe mucosal involvement of the internal leaflet preputial which can cripple surgery. Among the complications, when opting for surgery, is the compromising the free end of the penis that has not been appointed as common sequela. This paper aims to describe the clinical and histopathological findings of an unusual case of stenosis and fibrosis of
The scientific literature lacks detailed morphological descriptions of the histological development and cell differentiation of fetal bovine hoof. In this study, 40 extremity members of Holstein bovine fetuses were collected and divided into four groups (G1 to G4) based on the estimated age. Fragments were removed from wall and sole, processed and stained with hematoxylin -eosin (HE) for light microscopy observation. In G1, it was found that the epidermis was very thin, including keratinocyte layers and clusters of mesenchymal cells. In group G2 it was observed that the thickness of the epidermis covering the limbs remained variable and laminar corium developed in the germinal layer. In group G3 it was noted that in the germinal epithelium there were papillae in little advanced development and cells of the stratum corneum in the initial process of keratinization. In G4, the epidermis was well developed with layers distributed homogeneously, containing symmetrical and long papillae and intense production of keratin. In this work, the most important cellular events for the formation of the fetal hoof in Holstein cattle were first described in different stages of their formation.Keywords: bovine hoof, podiatry, fetal development RESUMO A literatura científica carece de descrições morfológicas detalhadas sobre o desenvolvimento histológico e diferenciação celular do casco fetal bovino. Neste estudo, 40 extremidades de membros de fetos bovinos da raça Holandesa foram coletados e divididos em quatro grupos (G1 a G4) com base na estimativa da idade. Desses membros, foram retirados fragmentos da parede e sola, processados e corados por hematoxilina-eosina (HE
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