The study was conducted in 265 clinical cases of mammary and skin/ subcutaneous
neoplasms in dogs presented to University Veterinary Hospitals Mannuthy and Kokkalai during
a period of 36 months from October 2017 to September 2020. Mammary neoplasms were found
more in females (51.7 per cent) than in males whereas skin and subcutaneous neoplasms were
found more in male dogs (48.3 per cent). The maximum occurrence of neoplasms was recorded in
the age group of eight to twelve years (38.5 per cent) whereas least occurrence was noticed in the
age group up to four years (9 per cent). Labrador and Rottweiler breeds were found more affected
with neoplasms (38 per cent each) with highest occurrence of mammary neoplasms in inguinal
mammary glands (35.03 per cent) and highest occurrence of skin/ subcutaneous neoplasms on
sites involving trunk region (14.06 per cent cases). Eighty-three per cent of the neoplasm cases
in the present study were pet dogs with a greater number of dogs maintained in outdoor kennels
and 17 per cent of neoplasm was found in free-roaming dogs rescued from streets. Out of total 265
dogs, 37.73 per cent dogs were found to be having commercial dog food as their main feed and 32
per cent dogs were fed with a mixed diet of homemade food and commercial dog food. Among the
cases, 14.71 per cent dogs had a previous history of cancer surgery
The present study was carried out to assess the pulmonary metastatic lesions in cases
of canine superficial and mammary neoplasms presented to the University Veterinary Hospitals,
Mannuthy and Kokkalai, Kerala Veterinary and Animal Sciences University during a twelve month
period from February 2019 to February 2020. Twenty-four cases of neoplasms in dogs consisting
of 12 cases of superficial neoplasms and 12 cases of mammary neoplasms were subjected to
fine needle aspiration cytology (FNAC) for the confirmation of malignancy of neoplasm and three view thoracic radiographs were taken to assess the pulmonary metastatic pattern. The results
were correlated with the malignancy detected in histopathological analysis after excisional biopsy.
The most commonly observed pulmonary metastatic lesions were pulmonary nodules followed by
pulmonary micronodules, miliary nodules, and pulmonary mass. These lesions were more evident
in malignant mammary neoplasms especially in tubulopapillary carcinoma, ductal carcinoma, and
medullary mammary carcinoma with spatial arrangements more in the perihilar region followed
by caudodorsal, midventral, and cranioventral area of lung parenchyma. In case of superficial
neoplasms miliary patterns and pulmonary microndules were mostly detected as pulmonary
metastatic pattern in soft tissue sarcoma, round cell tumour, and malignant fibrohistiocytoma.
Nowadays, neoplasms have become the common surgical affections encountered in the pet population, especially in dogs. Skin neoplasms are the most common neoplasm observed in dogs, followed by mammary neoplasms. Most of the neoplasm may exhibit metastatic and paraneoplastic changes in distant sites other than primary tumor sites, mainly in the thorax. The present study investigated the evaluation of radiographically evident cardio-pulmonary, metastatic and paraneoplastic changes in the thorax of twenty- four clinical cases of dogs of either sex belonging to different breeds, and age, having superficial cutaneous and mammary neoplasm conditions.
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