Dicephalia in a bovine / Dicefalia em bovino

Background: Congenital defects consist of structural or functional abnormalities present at birth, which partially or globally affect the systems. Among the defects are the conjoined twins, a rare congenital anomaly caused by fusion of two monozygotic embryos which can be classified according to the different sites of union. The Siamese twins and embryonic duplication are represented by a progressive series of malformations, since partial duplication of part of the body to the training almost full two bodies. Siamese twins occur in humans and in several animal species. Dicephalia refers to two totally separate heads. The aim of this study was to report a case of dicephalia in a bovine fetus. Case: A crossbred bovine fetus from a cow pregnant at. The animal was fixed by immersion in 10% formalin for sample collection. Muscles were dissected, with exposure of the bones of the right head, neck, forelimb, and hind limb. After dissection, the fetus was subjected to a preservation process by impregnation with glycerin. Next, internal organs were removed in bloc (from tongue to rectum) for evaluation of internal alterations. Additionally, radiographs of the spinal cord were performed to diagnose alterations by diagnostic imaging. Radiography revealed the presence of two skulls; two cervical spines, both with seven vertebrae; two thoracic spines, both with 13 vertebrae; and two lumbar [...]

Squamous cell carcinoma in a pig / Carcinoma de células escamosas em suíno

Background: Squamous cell carcinoma (SCC) is a malignant neoplasm of epidermal cells that exhibits keratinocyte differentiation. These neoplasms are common in dogs, cats, horses, and cattle, relatively uncommon in sheep, and rarely affect goats and pigs. There are several factors that are associated with the development of SCC, including prolonged exposure to ultraviolet light, lack of pigment in the epidermis, and sparse coating or lack of fur at the affected sites. The aim of this study was to report the occurrence of squamous cell carcinoma in a domestic pig. Case: A surgically removed nodule from the left ear of a female, light-colored, three-year-old pig, which breed was not defined, was submitted for histopathological analysis. The sample was fixed in 10% formalin, analyzed macroscopically, routinely processed for histology, sectioned at five microns and stained with hematoxylin and eosin. Additionally, anticytokeratin (AE1/AE3) and anti-vimentin immunohistochemical assays were performed. All additional information was provided by the animals owner. According to the history obtained, the animal belonged to a herd made up of five females and one boar. For four months, multiple nodules started to grow on the outer surface of the pigs ear and in many occasions exhibited ulceration and bleeding. One of the nodules was submitted for histopathology examination.[...]

Dicephalia in a bovine / Dicefalia em bovino

Background: Congenital defects consist of structural or functional abnormalities present at birth, which partially or globally affect the systems. Among the defects are the conjoined twins, a rare congenital anomaly caused by fusion of two monozygotic embryos which can be classified according to the different sites of union. The Siamese twins and embryonic duplication are represented by a progressive series of malformations, since partial duplication of part of the body to the training almost full two bodies. Siamese twins occur in humans and in several animal species. Dicephalia refers to two totally separate heads. The aim of this study was to report a case of dicephalia in a bovine fetus. Case: A crossbred bovine fetus from a cow pregnant at. The animal was fixed by immersion in 10% formalin for sample collection. Muscles were dissected, with exposure of the bones of the right head, neck, forelimb, and hind limb. After dissection, the fetus was subjected to a preservation process by impregnation with glycerin. Next, internal organs were removed in bloc (from tongue to rectum) for evaluation of internal alterations. Additionally, radiographs of the spinal cord were performed to diagnose alterations by diagnostic imaging. Radiography revealed the presence of two skulls; two cervical spines, both with seven vertebrae; two thoracic spines, both with 13 vertebrae; and two lumbar [...](AU)

Squamous cell carcinoma in a pig / Carcinoma de células escamosas em suíno

Background: Squamous cell carcinoma (SCC) is a malignant neoplasm of epidermal cells that exhibits keratinocyte differentiation. These neoplasms are common in dogs, cats, horses, and cattle, relatively uncommon in sheep, and rarely affect goats and pigs. There are several factors that are associated with the development of SCC, including prolonged exposure to ultraviolet light, lack of pigment in the epidermis, and sparse coating or lack of fur at the affected sites. The aim of this study was to report the occurrence of squamous cell carcinoma in a domestic pig. Case: A surgically removed nodule from the left ear of a female, light-colored, three-year-old pig, which breed was not defined, was submitted for histopathological analysis. The sample was fixed in 10% formalin, analyzed macroscopically, routinely processed for histology, sectioned at five microns and stained with hematoxylin and eosin. Additionally, anticytokeratin (AE1/AE3) and anti-vimentin immunohistochemical assays were performed. All additional information was provided by the animals owner. According to the history obtained, the animal belonged to a herd made up of five females and one boar. For four months, multiple nodules started to grow on the outer surface of the pigs ear and in many occasions exhibited ulceration and bleeding. One of the nodules was submitted for histopathology examination.[...](AU)