Schwannomas, also known as neurilemmomas, are a type of tumor that originates from the Schwann cells found on peripheral nerves. While these growths can occur in individuals of any age, those with genetic disorders are at a higher risk. Although schwannomas are generally benign, there are rare cases where they may transform into malignant tumors. The symptoms experienced by affected individuals largely depend on the specific location of the growths. Given their slow growth rate, it is not uncommon for symptoms to remain undetectable for several months or even years, often only being discovered incidentally during medical examinations conducted for unrelated reasons.
Understanding Schwannomas
A schwannoma is a type of tumor that originates from the Schwann cells found in the peripheral nervous system. These specialized cells envelop and safeguard the peripheral nerves while facilitating the transmission of nerve impulses. While schwannomas are typically noncancerous, there are isolated instances where they can become malignant, classifying them as soft tissue sarcomas. Schwannomas can develop in individuals who are in good health, but they can also be caused by genetic disorders.
Where Do Schwannomas Develop?
Schwannomas typically develop within the peripheral nervous system, which comprises the cranial nerves and nerve roots. However, it is rare for them to develop in the brain or spinal cord. One of the most common locations for a schwannoma is on the nerve that connects the inner ear to the brain, known as a vestibular schwannoma. In some cases, rare cancerous schwannomas may develop in the brachial plexus nerve in the arm, the sciatic nerve in the legs, or the sacral plexus in the lower back.