Epidemiological profile of canine neoplasms in São Luís/MA: a retrospective study (2008-2015)

The diversity of neoplasms observed in dogs can vary geographically depending on individual susceptibility, the habitat of the animals, and environmental characteristics. The aim of this study was to evaluate the epidemiological aspects of neoplasms in dogs treated at the Veterinary Hospital of the State University of Maranhão from 2008 to 2015. We studied the medical records of 1089 dogs affected by neoplasms and treated at a hospital during the period of study, relating to the casuistry with their breed, age, sex and origin. The present study included 764 cases that were confirmed through cytopathology. The most prevalent tumors were transmissible venereal tumors (TVT) (20.17%), adenocarcinoma of the mammary gland (19.53%), mixed malignant tumor of the mammary gland (18.63%), mast cell tumor (11.31%), and mammary carcinoma (6.42%). Females with a mean age of 9.2 years were the most affected, as were SRDs, Poodles, American Pitbulls, and Dobermann Pinschers. According to the cytomorphogenetic classification, the round cell tumors were the most prevalent, with values close to those of epithelial, followed by mixed and mesenchymal cells.

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Cytology of Canine Cutaneous Round Cell Tumors

Veterinary Pathology ◽

10.1177/030098587901600605 ◽

1979 ◽

Vol 16 (6) ◽

pp. 673-679 ◽

Cited By ~ 35

Author(s):

J. R. Duncan ◽

K. W. Prasse

Keyword(s):

Mast Cell ◽

Final Diagnosis ◽

Cell Tumor ◽

Histologic Examination ◽

Round Cell ◽

Mast Cell Tumors ◽

Mast Cell Tumor ◽

Round Cell Tumors

Sixty-four canine cutaneous round cell tumors were divided into 25 mast cell tumors, 15 histiocytomas, nine cutaneous lymphosarcomas and 15 transmissible venereal tumors. The final diagnosis was made from cytologic, clinical and histologic findings. Cytologic features were significantly distinctive in mast cell tumor, transmissible venereal tumor, and most cases of histiocytoma and lymphosarcoma to allow a diagnostic opinion. This opinion was supported by subsequent histologic examination. In some instances cytology was considered essential in rendering a diagnostic opinion even though histology was available.

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Epidemiological Aspects and Differential Diagnosis of the Cutaneous Round Cell Tumors in Dogs

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Veterinary Medicine ◽

10.15835/buasvmcn-vm:12591 ◽

2017 ◽

Vol 74 (1) ◽

pp. 64

Author(s):

Roxana CORA ◽

Adrian Florin GAL ◽

Marian TAULESCU ◽

Flaviu TABARAN ◽

Andras NAGY ◽

...

Keyword(s):

Mast Cell ◽

Differential Diagnosis ◽

Epidemiological Data ◽

Cell Tumor ◽

Tumor Type ◽

Round Cell ◽

Cutaneous Lesions ◽

Stray Dogs ◽

Mast Cell Tumor ◽

Round Cell Tumors

Round cell neoplasms (RCNs) are frequent cutaneous lesions in dogs, with high percentages among skin tumors. In this category are included histiocytoma, mast cell tumor, plasmacytoma, lymphoma and transmissible venereal tumor. The aim of the study was to perform an epidemiological study with reference to the cutaneous round cell tumors in a period of 10 years in the Department of Pathology (Faculty of Veterinary Medicine, Cluj-Napoca, Romania). Additionally, in the recorded cases with round cell tumors (mast cell tumor, histiocytoma and lymphoma) we described the main histological and cytological features. The epidemiological data were collected from the records of Pathology Department between 2005-2014. The investigation included dogs diagnosed with cutaneous round cell neoplasms, following necropsy analysis or assessment of biopsies or cytological samples. All collected specimens were analyzed by histopathological and/or cytological techniques. The staining used for histological investigation were Hematoxylin-eosin, Massonâ€™s trichrome and Toluidine blue, whereas Diff Quik and Wright methods were utilized in cytological specimens. The distribution of the cutaneous round cell tumors in relation to age, breed and sex was also assessed. The most frequent round cell tumor type was the mast cell tumor (19.54%) followed by histiocytoma (11.33%) and lymphoma (1.98%). The round cell tumors recorded were equally distributed in both males and females. Concerning the distribution of cutaneous RCNs by age (average age), histiocytoma occurred in 5 years old subjects, mast cell tumor in 11.9 years old subjects, and lymphoma in 6 years old subjects. Mast cell tumor was more frequent in stray dogs and Boxer breed, while histiocytoma occurred more commonly in stray dogs. Histological and cytological analysis was mandatory to perform the differential diagnosis between RCNs. Microscopic details concerning cytoplasm and nucleus of tumoral cells, together with the displaying mode in histological specimens may reveal the type of RCN. Cutaneous round cell tumors had an increased incidence, aspect observed in other reports too. The differential diagnosis has to rely on some specific microscopical features that can suggest the type of RCN.

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