Epidemiology of tumors in dogs in the capital of the state of Mexico from 2002-2016

E García,S Martínez,D Córdova,R Fajardo,A Alpízar,L Pérez

doi:10.1590/1678-4162-10534

Abstract

ABSTRACT A retrospective and cross-sectional study of canine tumors was performed in the capital of State of Mexico from 2002-2016. Since then, 393 tumors were remitted. Descriptive epidemiology was made from all data: breed, age, sex, and tumor features. Then the risk association between cutaneous and non-cutaneous tumors with variables such as sex, breed, and age were analyzed through an exact Fisher test and Odds ratio. In addition, some characteristics of the canine population were studied under a survey. Of all tumors, skin tumors were the most frequent (59.0%). The group of tumors related to ultraviolet radiation was the most common (15.1%). The frequency of tumors in females was 53%, nevertheless, males had more risk to develop cutaneous tumors (OR=1.88, 1.24-2.84) (0.003). The Pure breeds were the most common (82.5%) and the most frequent age range was > 7 years (54.7%). The survey showed that males (53%) and the age range 1-7 years (62.1%) were the most frequent. Conclusions, age, breed, and sex were identified as the major risk factors for tumorigenesis. Likewise, skin tumors were associated with exposure to ultraviolet radiation, probably to the height of the locality (2667mamls).

Highlights

Tumors are one of the main causes of death in the veterinary practice of small species, this is because the survival time has increased in these species as in humans (Fleming et al, 2011; Choi et al, 2016)
The following eight years were collected to increase the sample size and a survey was carried out to explore some characteristics of the canine population and the possible risk factors involved with tumorigenesis in dogs, all this to be able to enlarge the perspective of oncological behavior in veterinary medicine
Mast cell tumor and histiocytoma where the most frequent skin tumors followed by tumors that were associated with exposure to solar radiation (Figure 1)

Summary

Introduction

Tumors are one of the main causes of death in the veterinary practice of small species, this is because the survival time has increased in these species as in humans (Fleming et al, 2011; Choi et al, 2016). Epidemiological studies have shown that the most frequent neoplasms in these species are those of the skin, followed by mammary gland, hematopoietic system, and soft tissues (Brønden et al, 2010; Grüntzig et al, 2016) Another important aspect that has generated epidemiology is the knowledge of risk factors that affect the individual, both, genetically and environmentally (Fleming et al, 2011). We published the prevalence of tumors in the dogs of the municipality of Toluca In this second work, the following eight years were collected to increase the sample size and a survey was carried out to explore some characteristics of the canine population and the possible risk factors involved with tumorigenesis in dogs, all this to be able to enlarge the perspective of oncological behavior in veterinary medicine

Methods

Results

Conclusion