Nerve Sheath Tumor in Dogs
Nerve sheath tumors are tumors that grow from the myelin sheath that covers the peripheral and spinal nerves. This type of tumor affects the nervous system of the body, as it compromises the functioning ability of the peripheral and/or spinal nerves that form the peripheral nervous system and which reside or extend outside the central nervous system (CNS). Over 80 percent of such tumors affect the forelimbs of dogs. Any breed and gender may be affected.
Symptoms and Types
- Progressive and chronic lameness in forelimb (common symptom)
- Muscle wasting
- Decreased muscle tone
- Uncoordinated movements
- Limb weakness
The exact cause is not known.
You will need to give your veterinarian a thorough history of your dog's health, including a background history and onset of symptoms. Your veterinarian will conduct a complete physical examination with laboratory tests, including complete blood count (CBC), biochemistry profile, and urinalysis. The results of these routine laboratory tests are usually within normal ranges. The cerebrospinal fluid (CSF), the protective and nourishing fluid that circulates around the brain and spinal cord, will also be tested, but the findings are usually non-specific. For confirmation of the diagnosis your veterinarian may need to take biopsy samples from the nerve sheaths using ultrasound guidance. Radiographic studies, including x-rays, magnetic resonance imaging (MRI), and computed tomography (CT-scan) will provide further information for a solid diagnosis. MRI is the most specific test for diagnosis of this disease.
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
A treatment of certain neoplasms that is administered using an x ray
The process of removing tissue to examine it, usually for medical reasons.
The collection of fluid in the tissue
Any type of pain or tenderness or lack of soundness in the feet or legs of animals
The process of removing all or part of a body part; usually refers to a limb (arm or leg) and is done for medical reasons.