Cat cancer

Adrenal Gland Cancer is a rare condition in cats, identified when tumors (pheochromocytomas) grow as a result of uncontrolled chromaffin cell growth.

Brain tumors are abnormal growths on the brain, and are uncommon in cats.

Chondrosarcoma is a rare type of cancer in cats which originates in cartilage. It is highly invasive, often infiltrating the surrounding soft tissues.

Kidney cancer is rare in cats and describes the development of tumors in the renal system which can include a large number of different tumor types.

Lung cancer is the formation of one or more malignant tumors in the lungs. Primary lung cancer in cats is rare but when it occurs, it is likely to metastasize.

Adenocarcinomas in cats are a large group of malignant tumors, caused by unregulated cell growth within glandular tissue.

Lower urinary tract cancers are defined as disorganized, uncontrolled growth of cells in the bladder, urethra, and the prostate gland in male cats. Lower urinary tract cancers are rare in cats.

Soft tissue sarcomas are a group of tumors that arise from the connective tissue, muscle, or nervous tissues in cats. This group of tumors includes fibrosarcoma, leiomyosarcoma, peripheral nerve sheath tumors, myxosarcoma, and injection site sarcoma.

Fatty tissue tumors are masses of cells which develop under the skin in cats and are primarily composed of fat. They are soft to the touch, round, and not anchored, so they tend to move freely when pressed.

Cancer of the prostate gland occurs when collections of cells of the prostate divide uncontrollably. Prostatic tumors are very rare in cats, but more common in dogs and because of this, much of what we know about this condition in cats comes from data about dogs.

Cutaneous hemangiosarcoma (HSA) is a rare malignant skin cancer in cats that arises from abnormal cells within blood vessels. Cutaneous HSA usually arises on the head and ears in lightly haired areas.

Fibrosarcomas are a group of malignant tumors (cancer) that originate in fibrous connective tissue. This type of tumor develops slowly and does not often spread, but can cause extensive tissue damage.

Hemangiosarcoma is cancer of the blood vessel walls. Visceral hemangiosarcoma is when this cancer occurs internally. Hemangiosarcoma is a highly aggressive and metastatic cancer type characterized by fragile, blood-filled lesions in the organs.

Rhabdomyosarcoma (RMS) in cats is a malignant tumor originating from the striated muscle cells (muscles normally attached to bones), occurring wherever there are striated muscle fibers. 

Melanomas are tumors of pigment-producing cells, known as melanocytes. Formation of melanoma involves a complex combination of genetic and environmental factors and may be malignant or benign. Feline melanoma usually develops in the mouth, eyes, or skin.

Feline osteosarcoma (OSA) is a type of cancer that arises from uncontrolled growth of bone cells. OSA is the most common type of bone cancer in cats. The underlying cause of OSA is unknown, but previous trauma, bone infection, or radiation are thought to be possible contributing factors.

Tumors of the eye, defined as abnormal cell growth in or around the eyes, are uncommon in cats. Most eye tumors are malignant, aggressive, fast-growing, and likely to spread throughout the body where they have serious consequences.

Mast cells are white blood cells which regulate histamine response in the body and can be found in the skin, spleen, and intestines. Mast cell tumors in cats are masses formed by the rapid replication of mast cells.

Injection site sarcoma is a rare condition in cats where a cancerous mass develops in the soft tissue around an injection site. While all injections initially cause a small bump, masses that are present for over 3 months, greater than 2cm in diameter, or grow rapidly require urgent care.

Urinary tract cancer is an extremely rare condition in cats, with no known risk factors. Can develop in the bladder, kidneys, ureters (tube connecting kidneys to bladder), urethra (tube where urine is expelled from the body), and prostate gland (in males).

Squamous cell carcinoma (SCC) is a cancer of the flat cells that line many tissues in cats, such as the skin, mouth, and esophagus. SCC occurs most commonly where hair is sparse or light-colored as there is less protection from UV rays.

Mammary gland tumors are masses that result from uncontrolled cell growth in the mammary (breast) tissue. They are common in older, unspayed cats and are usually malignant.

An eyelid tumor is a mass of rapidly growing cells located anywhere on the eyelid from the base of the lashes to the topmost edge of the lid. Masses can be benign or malignant but in cats, eyelid tumors are usually malignant.

Lymphoma (lymphosarcoma) is a common form of cancer that causes an uncontrolled growth in the number of lymphocytes (white blood cells).

Feline leukemia virus (FeLV) is one of the most prevalent infectious diseases and is the most common cause of cancer in cats. 

Cancer in cats tends to be more aggressive than cancer in dogs. There are many different types of cancer in cats such as mammary cancer, skin cancer, and lymphoma.