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

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).

A Retrospective Study of Neoplasms of Companion Animals In Abuja, Nigeria

“…Findings from this study showed that neoplasms were more common in male dogs (57.1%) than in female dogs (42.9%) whereas in cats, it was more common in females (66.7%) than in males (33.3%). Several studies on the prevalence of neoplasms in dogs and cats reported a higher prevalence in females than males and attributed it to the preponderance of mammary gland tumors in females [3,6,13,14,15]. However, no case of mammary gland tumor was recorded in female dogs in this study, which could probably be the reason why the prevalence of neoplasms was higher in male dogs.…”

Epigenetic Mechanisms in Canine Cancer

“…A large set of studies has shown that most common types of canine tumors are located in the skin followed by mammary tumors. Some studies have registered skin tumors frequencies as high as 40 or 50% (17,18). However, depending on the proportion between females and males, mammary tumors have been observed around in about 36% of total cases (19), since mammary tumors account for more than 50% of the diagnosed tumors in females (20)(21)(22)(23).…”

Vulvar squamous cell carcinoma in a captive female chimpanzee: A case report

“…Squamous cell carcinoma (SCC) is a malignant tumor that originates from the squamous epithelium, and is very invasive and rarely produces metastases. It is a frequent tumor in cats and dogs 1 . In humans, the SCC is the second most frequent skin tumor and usually appears anywhere in the body, but they usually appear more frequently in areas exposed to the sun's ultraviolet (UV) light.…”

“…It is a frequent tumor in cats and dogs. 1 In humans, the SCC is the second most frequent skin tumor and usually appears anywhere in the body, but they usually appear more frequently in areas exposed to the sun's ultraviolet (UV) light. The UV exposure that a person receives throughout his life becomes a cumulative cellular damage that can cause SCC.…”