A 9-year-old emasculated male Spitz with tenesmus and constipation had a subcutaneous mass at the left ventral aspect of the anus with history of polyuria and polydipsia. A complete blood cell count, serum biochemistry panel, and urinalysis cystocentesis sample were evaluated. Abnormalities in the serum biochemistry panel included a mildly elevated serum cholesterol concentration 7. Furthermore, testing revealed an increased intact parathyroid hormone concentration On cytologic and histopathologic examinations, various types of cells were observed. Most of the cells were oval to polygonal and had elliptical or elongate nuclei and a moderate amount of pale to basophilic cytoplasm.
Evaluation of an anal sac adenocarcinoma tumor in a Spitz dog
Anal sac tumours (carcinoma of the apocrine glands of the anal sac) Information Sheet
They are referred to as perianal gland tumors, dog anal sac tumors, anal polyps, or as an adenoma another name for benign tumor. Another tumor type found in the canine anal area are rectal tumors among others. The tumors are usually primary in nature, meaning they originate in the anal area and did not occur as the result of cancer elsewhere in the body. Tumors can be benign treatable and not life threatening or malignant in nature called adenocarcinoma.
Anal Sac Tumors
The anal glands are small sacs found on either side of the anal opening of your dog. The lining of the sacs produces a small amount of liquid, which is eliminated each time your dog defecates. The development of a tumor in this area can be significant; even with the presence of a small growth there is the definite possibility that the tissues will be invaded and the cancer will spread metastasize. In some cases, the tumor can cause hypercalcemia elevated blood calcium , leading to kidney failure.
Dogs and cats can function normally without these scent glands. Cancer can develop in the anal sac glands in dogs, but rarely in cats. In most cases, this tumor affects only one anal sac, but occasionally both left and right sacs are affected.