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Cancer & Tumors

  • Nasal tumors are an uncommon type of cancer but when they do occur, they tend to be malignant and locally aggressive. Staging can be done to determine the type of cancer and if it has affected anywhere else in the body. Treatment can be done in some cases to help relieve clinical signs, most often with radiation therapy.

  • A chemodectoma is a type of tumor made up of chemoreceptor cells. Chemoreceptor cells detect chemical changes in the body and respond by regulating chemical or physical processes. These tumors are most often seen along one of the carotid arteries and the aorta. Brachycephalic breeds are more predisposed to these types of tumors, though they may occur in any dog breed. These tumors are usually locally aggressive, however, there are rare cases of metastasis to other organs, including the lungs, lymph nodes, and bone.

  • Gastrinomas and intestinal carcinoids are neuroendocrine tumors that occur in the pancreas and upper intestine (gastrinomas) and in the intestines (intestinal carcinoids). Generally, neuroendocrine tumors are rare in dogs and cats. This handout outlines their signs, diagnosis, treatment, and prognosis.

  • Medullary thyroid carcinomas and pheochromocytomas are neuroendocrine tumors that occur in the thyroid gland and the adrenal gland, respectively. Generally, neuroendocrine tumors are rare in dogs and cats. This handout outlines their signs, diagnosis, treatment, and prognosis.

  • Small cell lung carcinomas (SCLC) are a rare type of lung cancer. The prognosis for small cell lung carcinoma is generally poor, as it is highly aggressive. This handout outlines their signs, diagnosis, treatment, and prognosis.

  • Odontogenic fibromas, sometimes previously referred to as an epulis, are benign tumors of the mouth often at the front of the upper jaw. These may be locally invasive and may cause some oral pain. Surgery is the recommended course of action to treat this condition.

  • Fibrosarcomas are the second most common oral tumor in cats and arise from the fibrous and connective tissues of the oral cavity. These tumors are very invasive locally and are often difficult to manage, Diagnosis is based on biopsy and treatment involves surgery and occasionally radiation or chemotherapy. Palliative care with pain relief and antibiotics are essential to improve quality of life.

  • The most common oral tumor seen in cats is squamous cell carcinoma; the second most common is fibrosarcoma. This handout discusses the clinical signs, diagnosis and treatment of oral tumors in cats.

  • Fibrosarcomas are the third most common oral tumor in dogs and arise from the fibrous and connective tissues of the oral cavity. These tumors are very invasive locally and are often difficult to manage, Diagnosis is based on biopsy. Treatment involving surgery and radiation provide the longest survival times.

  • Oral melanomas are the most common malignant oral tumor in dogs. Melanomas usually present as a mass in the mouth and may be melanotic (pigmented) or amelanotic (non-pigmented). These tumors are both locally invasive and have a high tendency to metastasize to other organs. Full staging including CT scanning is recommended to determine the extent of the disease.