A histopathological analysis of 13 apocrine gland tumors and 22 sebaceous gland tumors in dogs was performed, which were submitted to the Department of Veterinary Pathology from 1 January 2010 to 31 ...December 2012. An association between the immunohistochemical expression of E-cadherin and Ki-67, the type, and the biological behavior of the tumors was investigated. The mean age of dogs with apocrine gland tumors was 10.15 years, and 10.91 years for sebaceous gland tumors. According to the histopathological analysis, 53.8% carcinomas and 46.2% adenomas of the apocrine glands were found. In the sebaceous gland tumors, epitheliomas were dominant (50.0%), followed by adenomas (36.4%) and carcinomas (13.6%). Survival time in dogs with sebaceous gland tumors was shortest in patients with diagnosed epitheliomas, intermediate in adenomas, and longest in carcinomas. The incidence of metastases was low in the groups with sebaceous adenomas and epitheliomas, and recurrence was most common in carcinomas. The average survival time was about the same for apocrine gland adenomas and carcinomas, with a higher incidence of metastases and recurrence for carcinomas. Immunohistochemical analysis of E-cadherin and Ki-67 expression confirmed the efficiency of this method for the accurate histological classification of apocrine and especially sebaceous gland tumors. The analyzes performed showed that the location and intensity of E-cadherin expression can be helpful in predicting the biological behavior of sebaceous gland tumors. In contrast to sebaceous gland tumors, the analysis of apocrine gland tumors showed that there was no correlation between E-cadherin expression and the biological behavior of apocrine gland tumors.
Cytology is the diagnostic procedure of the microscopic evaluation of cells. It is becoming increasingly important and more frequently used in veterinary diagnostics, having many advantages including ...simplicity, speed and low cost. To determine the pathological changes diagnosed by cytology in cats, as well as the distribution of age, breed and gender in the diagnosed changes, we performed a retrospective study on slides submitted to the Department of Veterinary Pathology for routine cytological examination. The archive was searched for all feline cytology slides submitted from 2009 to 2018. All the slides were re-evaluated and classified into one of the four pathological processes: ‘neoplasia’, ‘inflammation’, ‘other condition’ or ‘non-diagnostic sample’. Breed, age, gender and the tissue from which the lesion was sampled were noted from the submission form, and statistically analyzed. The most frequent type of pathological process diagnosed was neoplasia, which reflects the high prevalence of neoplastic diseases in cats reported in literature data. Pathological changes were mostly diagnosed in domestic shorthaired cats of both sexes, with an average age of 8.4 years, but no breed, age or gender predisposition was found. The most evaluated tissue was skin, probably due to its accessibility and the ease of obtaining a sample from skin lesions. The most frequent neoplasia were malignant and the most frequent diagnosis was round cell neoplasia. Cats affected with round cell neoplasia had a significantly lower average age (7.3 years) than cats diagnosed with epithelial and mesenchymal neoplasia (9.9 and 10.3 years, respectively), probably reflecting the common retroviral infection in Croatian cats.
A granular cell tumor (GCT) in the central nervous system (CNS) of a ferret is a rare finding. In this case a cerebral GCT is described in a 5-year-old castrated female ferret. The animal developed ...lameness in right hind leg which progreseed to total ataxia. The animal died and a necropsy revealed the mass in the medial to caudal part of the left frontal lobe of the brain. Based on histological and imunohistochemical findings, tumor was diagnosed as granular cell tumor. Immunohistochemically, granular cells were diffusely positive for vimentin and neuron-specific enolase (NSE) and weakly focal reactivity for S-100 protein was seen. Neoplastic cells did not express cytokeratins and glial fibrillary acidic protein (GFAP). Although immunohistochemistry was performed, histogenesis of this tumor remains unsolved and controversial.
One of the current leading causes of death in pet cats is neoplasia. The scarcity of data on tumor prevalence in cats from south-eastern Europe led to this retrospective study which reports an ...abundant collection of tumors diagnosed in cats living in Croatia. Archived histopathology findings (diagnosis, cell origin, and biological behavior), and epidemiological data (breed, sex, age, and anatomical site of the tumor) of the cats diagnosed with at least one tumor were collected and statistically analyzed. For the research, 2338 archived feline samples, obtained from 2009-2019, have been reviewed. In 659 samples (28.1%) one or more tumors were diagnosed. Tumors have most often affected non-pedigree cats, cats between 7 and 15 years of age, and female cats. Most tumors showed malignant behavior (85.7%). The most frequent diagnoses were mammary adenocarcinoma, lymphoma, and squamous cell carcinoma. Regarding origin, most samples were epithelial (46.9%), but mesenchymal (28.7%) and lymphoid tumors (17.0%) were also frequently found. Tumors most often occurred in the skin and subcutis, mammary gland (in females), digestive system, and hemolymphatic system (in males). Statistical analysis did not reveal breed, sex, and age predisposition, but female animals and non-pedigree cats were significantly more likely to develop malignant tumors. This detailed study gives insight into the most frequent tumors that occur in cats from Croatia, and the data reported here is likely applicable to other countries. This data will contribute to clinical veterinary oncology, as it presents the most extensive tumor index of cats in south-eastern Europe.
Visceral hemangiosarcoma were analyzed at the Department of Veterinary Pathology of the Faculty of Veterinary Medicine, University of Zagreb, over a 5-year period. From a total of 52 tumor masses in ...a total of 31 dogs, histological growth patterns (cavernous, capillary or solid) and the amount of tumor supporting stroma were evaluated. Additionally, sections were stained with toluidine blue for the purpose of mast cell detection and their number was determined in the tumor parenchyma, tumor stroma and edges. The average age of the affected animals was 10 years, males predominated, and the tumors occurred most frequently in cross breeds, German Shepherd dogs and Labrador Retrievers. The highest number of visceral hemangiosarcoma was found in the spleen (27/52). The most common growth pattern of visceral hemangiosarcoma was solely cavernous with a mixture of cavernous and solid patterns in different proportions. Mast cells were found in 44/52 (84.6%) of the visceral hemangiosarcomas. A smaller number of mast cells were found in the tumor parenchyma, and higher number were found in the stroma and tumor edges. The number of mast cells in tumors was not significantly associated with the tumor growth pattern, but there was a positive correlation between MCC - tumor parenchyma and stroma (rs = 0.28, P<0.05), MCC - tumor stroma + edges (rs = 0.74, P<0.05) and MCC - tumor parenchyma and MCC- tumor stroma+edges (rs = 0.30, P<0.05) in all the examined tumors. In splenic tumors, there was only a significant positive correlation between MCC - stroma+edges (rs P = 0.68 P<0.05). These results suggest a higher mast cell count in tumors with more developed stromal components in canine visceral hemangiosarcomas, and certainly indicate the need for further research on their role and the factors they release in the development and progression of hemangiosarcomas.
HOHSTETER, M., I.-C. SOSTARI C -ZUCKERMANN, S. RELJIC, L. MEDVEN ZAGRADISNIK, B. ARTUKOVIC, Z. GRABAREVIC, J. KUSAK, D. HUBER, A. GUDAN KURILJ: Intestinal adenocarcinoma in a European brown bear ...(Ursus arctos) - a case report. Vet. arhiv 88, 569-579, 2018. This article presents the first case of intestinal adenocarcinoma in a free living, culled 12 year old, European female brown bear (Ursus arctos), with its characteristic macropathological and histopathological manifestations. Necropsy revealed thoracic gunshot injuries (compassionate shot) and the poor physical condition of the animal, with body fat loss and musculature atrophy. An infiltrative mass protruded the jejunal wall with infiltration of the mesentery, visceral and parietal peritoneum, and distal parts of the colon and rectum. The histopathological examination presented an infiltrative, unencapsulated, moderately cellular neoplastic mass, composed of an epithelial cell population, forming irregular nests, papillary and ribbon like structures and small number of tubules, surrounded by an extensive desmoplastic reaction. Within the tumor a small number of cysts filled with mucin were noted. The epithelial neoplastic cells exhibited mild anisocytosis and anisokaryosis, and a low mitotic index. Histochemical Van Gieson staining showed strong positivity in the desmoplastic proliferation. The epithelial tumor cells were positively imunostained with cytokerain, and stromal cells with vimentin. The histological features presented are characteristic of intestinal adenocarcinomas, of the mixed tubular and mucinous type, with a prominent scirrous reaction. Key words: intestinal adenocarcinoma; European brown bear (Ursus arctos); macropathology; histopathology; immunohistochemistry
An African pygmy hedgehog (
Atalerix albiventris
) (APH) was admitted to the clinic with a history of vaginal bleeding. Examination showed poor clinical status of the patient based on haemogram ...values. The ultrasound showed an enlarged uterus filled with an anechoic content without the presence of free abdominal fluid. Ovariohysterectomy was performed under general inhalation anaesthesia. Histopathology examination was performed on tissue samples of the uterus with the final diagnosis of an endometrial polyp with endometrial cystic hyperplasia and chronic endometritis. In regard to the diagnostic findings, therapeutic option and postoperative care performed in this case, it is important to emphasize the fact that an early diagnosis of a reproductive disease contributes to proper treatment and a positive outcome. The endometrial polyp with cystic endometrial hyperplasia and chronic endometritis should be added to the list of differential diagnoses in cases where neoplasia of the reproductive system is suspected in an APH.
Endometrial adenocarcinomas present rare neoplasia of bitches. This case report describes mucinous endometrial adenocarcinoma in a bitch with concurrent pyometra for the first time. A mass on the ...uterine stump was removed during surgery of a 13-year-old bitch with clinically suspected pyometra. Histopathology revealed mucinous endometrial adenocarcinoma. The tumor was classified according to human classification, responding to women's type I (endometrioid carcinoma). Immunohistochemistry showed a positive expression of estrogen receptor α, progesterone receptor, p53, and p16 gene, while vimentin was not expressed.
Cilj ovog rada bio je istražiti korisnost upotrebe imunohistokemijske metode (IHK) zajedno s histopatološkom pretragom u dijagnosticiranju i razlikovanju alimentarnog limfoma (AL) od upalne bolesti ...crijeva (UBC). U istraživanju su korišteni arhivski histopatološki nalazi i preparati tkiva, parafinski blokovi i stakalca. Prema pripadnosti pasmina podijelili u tri skupine malu, srednju ili veliku skupinu pasa. Cilj istraživanja bio je utvrditi povezanost pojedinih patoloških promjena ovisno o skupini pasa, dobi i spolu. Obavljenim istraživanjem zabilježili smo da je srednja vrijednost dobi u skupini malih pasmina pasa iznosila 7,58±3,59 godina, u skupini srednjih pasmina 7,45±3,04 godina te u skupini velikih pasmina 6,58±3,47 godina. Prosječna dob pasa oboljelih od alimentarnog limfoma iznosila je 8,8 godina, za razliku od upalne bolesti crijeva gdje je iznosila 7,0 godina. Unutar sve tri skupine pasa zabilježen je veći broj jedinki muškog spola. Najveći udio biopsiranih uzoraka (70,73 %) analiziran je iz tkiva tankog crijeva; po 8 uzoraka (27,59 %) iz male skupine pasa, 11 uzoraka iz srednje skupine (37,93 %) te po 10 uzoraka iz velike skupine pasa (34,48 %). Udio biopsiranog tkiva želudca bio je nešto niži (24,39 %) dok je tkivo debelog crijeva uzorkovano u samo dva psa (4,88 %). Histopatološkom analizom utvrđeno je 16 slučajeva upalne bolesti crijeva (45,71 %), 7 slučajeva limfoma (20,00 %), 9 slučajeva suspektne upale (25,71 %) te 3 slučaja suspektne upale/limfoma (8,58 %). Nakon provedene IHK metode ustanovljeno je da je u 6 slučajeva dijagnoza donesena histopatološkom evaluacijom potvrđena, u 5 slučajeva je opovrgnuta dok je u 5 slučajeva IHK metoda bila korisna kako bi razlučili AL od UBC. Utvrđene su značajne razlike (P<0,05) između dijagnoze upalne bolesti crijeva te limfoma ustanovljene patohistološkom pretragom te imunohistokemijskom metodom. Ustanovljena je češća pojavnost T staničnog limfoma u tankom crijevu dok je pojavnost B staničnog limfoma učestalija u želudcu. Povezanost s tendencijom učinka zabilježena je između patohistološke dijagnoze i CD3 biljega (r=-0.34; P=0,08) odnosno između patohistološke dijagnoze i CD79 biljega (r=0.36; P=0,09) s nešto nižom razinom povezanosti između patohistološke dijagnoze i dijagnoze IHK (r=0.21; P=0,34). Na temelju rezultata našeg istraživanja može se zaključiti da je imunohistokemijska metoda korisna za potvrdu dijagnoze i razlikovanje alimentarnog limfoma i upalne bolesti crijeva.
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