Logan Steele
Schwannomas are benign peripheral nerve sheath tumours that can develop from Schwann cells in the peripheral nervous system or nerve roots. They can occur in various parts of the body, including the brain, head, arms, legs, face, neck, and even the eyes or skin. While schwannomas usually grow slowly and may not cause any symptoms for years, they can eventually compress nerves or nearby structures, leading to symptoms such as pain, weakness, and sensory changes. Ancient schwannomas are a rare variant of schwannomas with solid-cystic characteristics and degenerative histological changes. They are typically diagnosed using MRI and histological studies, and treatment options include observation, surgery, and radiation. While the direct link between ancient schwannomas and muscle spasms is not explicitly mentioned, the compression of nerves and surrounding structures by schwannomas can cause a range of symptoms, including muscle weakness and dysfunction, which may contribute to muscle spasms.
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What You'll Learn
- Ancient schwannomas are benign tumours that can cause muscle spasms
- Schwannomas can form in the brain or elsewhere in the body
- Schwannomas can cause facial muscle spasms and paralysis
- Ancient schwannomas can be found in the psoas muscle
- Muscle spasms can occur after thoracic spine surgery for schwannoma
Ancient schwannomas are benign tumours that can cause muscle spasms
Schwannomas are benign tumours that arise from Schwann cells, which wrap around and support nerve fibres. They are usually slow-growing and can occur on any cranial or peripheral nerve in the body. While most schwannomas are benign, they can sometimes be malignant (cancerous).
Ancient schwannomas are a rare variety of schwannoma with solid-cystic characteristics and degenerative histological changes. They were first described by Ackerman and Taylor in 1951. The typical histological characteristics of this variety are attributed to the progressive growth and age of the lesion. Ancient schwannomas can present a degenerative pattern of cystic areas, calcifications, and hyalinisation that make diagnosis difficult.
Schwannomas can cause muscle spasms, especially when they grow large enough to compress nerves or nearby structures. This compression can cause symptoms such as facial twitching or weakness, with the eye, eyebrow, forehead, or mouth muscles affected. In addition, schwannomas can affect nerves in the face and neck, resulting in facial muscle pain, paralysis, problems swallowing or moving the eyes, and loss of taste.
When schwannomas grow on a nerve in an arm or leg, they can cause pain, weakness, tingling, and "pins and needles" sensations. They can also lead to carpal tunnel syndrome or tarsal tunnel syndrome. As schwannomas grow, they can become visually apparent and cause cosmetic concerns.
In some cases, muscle weakness or dysfunction after the removal of a schwannoma may be permanent. However, nerve function may improve soon after successful surgery on peripheral nerves.
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Schwannomas can form in the brain or elsewhere in the body
A schwannoma is a tumour that develops from Schwann cells in the peripheral nervous system or nerve roots. Schwannomas are almost always benign and rarely cancerous. They are usually slow-growing and may exist for years without any symptoms.
Schwannomas can also form in other parts of the body. For example, cancerous schwannomas frequently affect the sciatic nerve in the leg, the brachial plexus nerves in the arm, and the group of nerves in the lower back called the sacral plexus. In addition, people with genetic conditions such as neurofibromatosis type 2 (NF2), schwannomatosis, or Carney complex may develop schwannomas in various parts of the body. These patients often have multiple schwannoma-like tumours throughout their bodies.
The symptoms of schwannomas vary depending on their location. Vestibular schwannomas can cause hearing loss, tinnitus (ringing in the ears), and dizziness. Tumours near the facial nerve can lead to facial paralysis, difficulty swallowing, impaired eye movement, and altered taste sensations. Sciatic nerve schwannomas can cause low back pain radiating down the leg. In some cases, schwannomas may press on the facial nerve, resulting in facial twitching or weakness, including spasms of the eye, eyebrow, forehead, or mouth muscles.
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Schwannomas can cause facial muscle spasms and paralysis
Schwannomas are benign peripheral nerve sheath tumours that develop from Schwann cells in the peripheral nervous system. They are usually slow-growing and can occur in various parts of the body, including the brain, head, arms, legs, face, neck, and even the eyes or skin.
The most common type of schwannoma is the vestibular schwannoma, which arises from Schwann cells that wrap around and support nerve fibres. It typically occurs where the central nervous system transitions into the peripheral nervous system and can affect hearing and balance, causing tinnitus and dizziness. Acoustic neuromas are the most common type of brain tumour and can cause compression of the nerves that enable facial sensation and movement of the facial muscles.
In rare cases, schwannomas can be malignant (cancerous) and may require surgery for removal. Ancient schwannomas are a variety of schwannoma with solid-cystic characteristics and degenerative histological changes. They can be challenging to diagnose due to their cystic nature, and MRI is often used to detect them. Treatment for schwannomas typically involves observation and monitoring, with surgery reserved for cases where the tumour restricts movement, causes pain, or becomes cancerous.
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Ancient schwannomas can be found in the psoas muscle
Schwannomas are benign peripheral nerve sheath tumours that can form in several different areas of the body. They are usually slow-growing and almost always non-cancerous. The most common type of schwannoma is the vestibular schwannoma, which forms in a nerve in the inner ear.
Ancient schwannomas can indeed be found in the psoas muscle, although this is a rare phenomenon. The psoas muscle is a deep muscle located in the lower back region, and ancient schwannomas in this area can be challenging to treat surgically due to their proximity to the lumbar plexus. However, surgery can be performed safely using intraoperative neurophysiological monitoring (IONM) to detect and prevent potential nerve damage.
There have been a limited number of cases of schwannomas in the psoas muscle reported in international literature, with approximately 15 cases published. Ancient schwannomas in the psoas muscle can cause severe pain in the inguinal region, which is the area between the lower abdomen and the thigh. This pain may not radiate to the leg, as seen in a case involving a 62-year-old female patient.
In another case, a 31-year-old male patient experienced lower back pain and numbness in the anterolateral thigh for two months. Magnetic resonance imaging (MRI) revealed a mass lesion in the right psoas muscle, which was diagnosed as a schwannoma. The patient underwent successful surgery for excision of the tumour, and no neurological injury was detected during the procedure.
Ancient schwannomas in the psoas muscle can be effectively treated with surgical excision, and the prognosis is typically excellent with rare recurrences.
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Muscle spasms can occur after thoracic spine surgery for schwannoma
Schwannomas are tumours that develop from Schwann cells in the peripheral nervous system or nerve roots. They are almost always benign and slow-growing, with the most common type being vestibular schwannomas, which form in the nerve connecting the brain to the inner ear. These tumours can cause hearing loss, tinnitus, and dizziness as they grow and affect the hearing and balance nerves. While death from these tumours is rare with proper diagnosis and treatment, they can cause a variety of symptoms, including muscle weakness, pain, and a pins-and-needles sensation.
The manipulation of nerves during surgery can result in local irritation, promoting ectopic excitation and abnormal nerve transmissions. This can be associated with traumatic demyelination during the procedure. In some cases, abnormal branching after aberrant axonal regeneration and enhanced motor neural excitability may also play a role in the development of muscle spasms post-surgery.
The presentation of muscle spasms after thoracic spine surgery for schwannoma can vary. In one case, a patient reported involuntary "twitching" and "dancing" movements at the dorsal surgery scar site, with focal myoclonus-like spasms of the bilateral trapezius and paravertebral muscles. The patient underwent a successful routine laminotomy from T2 to T4, with no major complications, but subsequently experienced these unusual movements, even during sleep.
The treatment for muscle spasms in this context may vary. In the aforementioned case, an initial gabapentin trial did not provide a clear benefit. However, subsequent treatment with onabotulinum toxin A guided by electromyography promoted a transient improvement in the patient's condition.
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Frequently asked questions
Ancient schwannoma is a variety of schwannoma with solid-cystic characteristics and degenerative histological changes. It was first described by Ackerman and Taylor in 1951.
Yes, an ancient schwannoma can cause muscle spasms. Schwannomas can grow on peripheral nerves or nerve roots and when they do, they can place pressure on these nerves, causing muscle spasms.
Ancient schwannomas can present a degenerative pattern of cystic areas, calcifications, and hyalinization. They are usually asymptomatic, but when they cause symptoms, it is due to compression or infiltration of neighbouring organs.
Treatment for ancient schwannomas typically involves surgery to remove the tumor.
