Nerve Sheath Tumor in Dogs
Schwannoma in Dogs
Schwannomas are tumors that originate in the myelin sheath. The myelin sheath is produced by the Schwann cell, a specialized cell which surrounds the peripheral nerves, providing mechanical and physical support for the nerves as well as insulating the nerves that transmit the nervous system’s electrical signals. The peripheral nervous system consists of the nerves outside of the central nervous system (brain and spine). Peripheral nerve sheath tumor is the term that has been proposed to include schwannomas, neurofibromas (nerve fiber tumors), neurofibrosarcomas (malignant nerve fiber tumors), and hemangiopericytoma (tumor of blood vessels and soft tissue), since they are all believed to arise from the same cell type.
Symptoms and Types
Your veterinarian will perform a complete physical exam on your dog, including a blood chemical profile, a complete blood count, a urinalysis and an electrolyte panel. You will need to provide a thorough history of your dog's health leading up to the onset of symptoms. A computed tomography (CT) or, ideally, a magnetic resonance imaging (MRI) can provide the most information regarding the extent and location of the disease. An electromyogram (a measurement of muscle activity) will show abnormal muscle activity if there is a schwannoma present.
A bundle of fibers that are used in the process of sending impulses through the body
peripheral nervous system
That part of the nervous system that includes the cranial nerves and spinal nerves
An in-depth examination of the properties of urine; used to determine the presence or absence of illness
A type of covering over certain nerve cells; may be found in areas of the spinal cord or on the brain’s white matter
sympathetic nervous system
The part of the nervous system that allows the body to react to a stressful situation
Small structures that filter out the lymph and store lymphocytes
A record of the strength of contractions of the muscles that are caused by electrical stimulation
Any type of pain or tenderness or lack of soundness in the feet or legs of animals
The removal of the lamina as a method of relieving pain and pressure on the spine
The wasting away of certain tissues; a medical condition that occurs when tissues fail to grow.
Something that becomes worse or life threatening as it spreads
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