1,721,003 research outputs found
Reflux esophagitis in three cats associated with metaplastic columnar esophageal epithelium
No full textGastroesophageal reflux is a relatively common condition in dogs and cats and may lead to secondary reflux esophagitis. A consequence of chronic gastroesophageal reflux that is well described in humans is Barrett's esophagus, which is the replacement of the normal squamous epithelium of the distal esophagus with metaplastic columnar epithelium. Three cats with clinical and endoscopic signs of chronic esophagitis had metaplastic columnar epithelium on biopsy of the distal esophageal mucosa. Suspected underlying causes were cardial incompetence and sliding hiatal hernia. Two cats had complete resolution of the clinical signs after treatment. One cat was euthanized
Ions and nematic surface energy: Beyond the exponential approximation for the electric field of ionic origin
No full textContributo alla conoscenza della pseudo-ostruzione intestinale cronica nel bulldog inglese
Full text linkSpontaneaous linear gastric tears in a cat
No full textAn eleven-year-old female cat presented for chronic vomiting. Endoscopy revealed an altered gastric mucosa and spontaneous formation of linear gastric tears during normal organ insufflations. The histopathological diagnosis was atrophic gastritis with Helicobacter pylori infection. Medical treatment permitted a complete resolution of clinical signs. Linear tears observed resemble gastric lesions rarely reported in humans, called “Mallory-Weiss Syndrome”. To authors’ knowledge this is the first report of spontaneous linear gastric tears in animals
Discrimination Between Cracks and Recrystallization in Steel Using Nonlinear Techniques
No full textOne major problem in ultrasonic NDT for steel products and welding inspection is that standard linear methods are often unable to distinguish the nature of signals. Partially recrystallized grains, voids, small cracks or inclusions in the piece under investigation could produce indications very similar in terms of acoustic energy reflected and ultrasonic peaks envelope. Here, we analyze the nonlinear response to ultrasonic excitations of steel bars with both kind of imperfections purposefully generated. Using the Scaling Subtraction Method as a tool for the analysis, we show differences in the nonlinear signature, which can be used to distinguish nondestructively a crack/delamination from a region with imperfect grains formation, with possible applications of this technique in the production cycl
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Gastric Intestinal metaplasia in the dog and cat : a retrospective study of 33 cases (January 2003-December 2006)
No full textIntestinal metaplasia (IM) is defined as the replacement of gastric mucous cells with an epithelium similar to that of the small intestine. The purpose of this retrospective study is to evaluate presence, type of gastric IM and possible association with carcinoma in histologic examinations of endoscopic gastric biopsy specimens obtained from 170 dogs and 50 cats. IM was found in 28 dogs (16,5%) and 5 cats (10%). Gastric carcinoma was associated with IM in four dogs and one cat. In 2 dogs repeated endoscopy with biopsy sampling showed progression of IM towards carcinoma in one case and complete regression in the other case. The understanding of the role of IM in gastric carcinogenesis in small animals needs further studies. Nonetheless, the results obtained suggest the necessity of endoscopic and histologic re-evaluation of patients with gastric IM
Mastocitoma intestinale in un cane
No full textVisceral mast cell tumors (MCT) are rare, malignant, highly aggressives and usually associated with extremely poor prognosis. A 4 year old male mixed breed dog was referred for an endoscopic evaluation of hematochezia and large bowel diarrhea. Physical examination was unremarkable. Colonscopy revealed a mass at about 17 cm. from the anus. Histopathology revealed a severe inflammatory infiltrate with eosinophils. Due to recurrence of intestinal signs and enlargement of the previously reduced mass after discontinuation of therapy with prednisone, surgery was performed. The mass with the regional lymph node was resected. Histology on the surgical piece revealed an intestinal MCT. Endoscopic biopsies were unable to detect the neoplasm. Age of the dog, primary site of the mass, surgery outcome and survival time are different from what usually reported as the biological behavior of visceral MCT in literature
Surgical removal of a localised vascular hamartoma in a dog
No full textA two year old male Labrador Retriever was presented for sudden abdominal
10 distension. Abdominal ultrasonography revealed abundant abdominal fluid and an
hepatic mass, which was removed by total lobectomy. Histologic evaluation of the
mass supported a vascular hepatic hamartoma. Vascular hamartomas are rare
malformations in animals. Only two cases of vascular hepatic hamartomas have
been reported in the dog. This is the first recorded case of canine vascular hepatic
15 hamartoma treated surgically with a successful long term outcome
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