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Mastocytomas in dogs occur mainly in the skin and subcutaneous tissue. Very rarely, they are found in internal organs such as the small intestine, [5] the mucosa of the mouth, [6] the nasal mucosa [7] or the conjunctiva. [8] About 20% of all skin tumors [9] and 6% of all tumors [10] in dogs are mastocytomas.
Pituitary gland tumors are very common in the canine. A productive form arising from the anterior pituitary is the primary cause of Cushing's disease of dogs. This tumor causes excessive production of cortisol from the adrenal cortex which leads to the classic signs of alopecia (hair loss), polyuria (excessive urination), polydipsia (excessive water drinking), and a pot-bellied appearance of ...
Desmoplastic small-round-cell tumor (DSRCT) is an aggressive and rare cancer that primarily occurs as masses in the abdomen. [4] Other areas affected may include the lymph nodes, the lining of the abdomen, diaphragm, spleen, liver, chest wall, skull, spinal cord, large intestine, small intestine, bladder, brain, lungs, testicles, ovaries, and the pelvis.
Liver cancer* is usually metastatic in dogs. Primary tumors are and include benign hepatocellular adenoma (hepatoma) and malignant hepatic carcinoids. [165] Brain tumors [168] * can be either metastatic or primary in dogs. The incidence of primary tumors is 14.5 per 100,000 dogs at risk.
The procedure is common in the treatment of Stage I and II non-seminomatous germ cell tumors. [2] In seminomas, another form of testicular cancer, radiation therapy is generally preferred to the invasive RPLND procedure. [4] Whether RPLND is needed after orchiectomy depends on the type of tumor and its stage. RPLND may be performed to remove ...
An abdominal mass is any localized enlargement or swelling in the human abdomen.Depending on its location, the abdominal mass may be caused by an enlarged liver (hepatomegaly), enlarged spleen (splenomegaly), protruding kidney, a pancreatic mass, a retroperitoneal mass (a mass in the posterior of the peritoneum), an abdominal aortic aneurysm, or various tumours, such as those caused by ...
CT is the best diagnostic modality: [25] a confluent mass surrounding the aorta [6] and common iliac arteries can be seen. On MRI, it has low T1 signal intensity and variable T2 signal. Malignant retroperitoneal fibrosis usually gives uneven MRI signals, is bulky, extends above the origins of renal arteries, or displaces the aorta anteriorly.
Diagnosis and treatment are similar to that of the dog. Cases involving difficult to remove or multiple tumors have responded well to strontium-90 radiotherapy as an alternative to surgery. [28] The prognosis for solitary skin tumors is good, but guarded for tumors in other organs. Histological grading of tumors has little bearing on prognosis ...