Nerve Sheath Tumors (Schwannoma and Neurofibroma)

Nerve sheath tumors are mostly benign soft tissue tumors that arise from the tissues surrounding and supporting peripheral nerves. These tumors can develop in different parts of the body and are particularly associated with nerves in the arms, legs, and trunk.

Schwannoma and neurofibroma are among the main benign nerve sheath tumors. These formations, which are usually slow-growing, may be present for a long time in some patients without causing any symptoms.

Schwannoma develops from Schwann cells surrounding the nerves and often grows by pushing the nerve fibers aside. Neurofibroma is a tumor that contains different cellular components of the nerve and may be more closely associated with the nerve fibers. Some types of neurofibromas may be associated with genetic diseases such as neurofibromatosis type 1 (NF1).

Depending on the size and location of the tumor, symptoms such as palpable mass, pain, numbness, tingling, or muscle weakness may occur.

Diagnosis and Evaluation

In the evaluation of nerve sheath tumors, the patient's complaints, physical examination, and neurological examination findings are considered together.

Magnetic resonance imaging (MRI) is one of the basic methods used to evaluate the location, size, and relationship of the tumor to the nerves. Ultrasonography can also be used for superficially located masses.

In cases where imaging findings are insufficient for diagnosis or where there is suspicion of a malignant tumor, biopsy and pathological examination may be necessary.

Careful planning of biopsy and surgical procedures is important due to the risk of damage to nerve tissue.

Treatment Approaches

Treatment for nerve sheath tumors is determined by the type, size, location, growth characteristics of the tumor, and the patient's symptoms.

In some tumors that are asymptomatic, slow-growing, and benign, regular clinical and radiological follow-up may be sufficient.

Surgical treatment may be considered for tumors that cause pain, numbness, muscle weakness, or impaired nerve function.

The aim of surgical treatment is to remove the tumor appropriately and preserve nerve function as much as possible. While schwannomas can be removed while preserving nerve fibers in some cases, the close relationship of neurofibromas to nerve tissue can make the surgical procedure more complex.

In cases with findings such as rapid growth, progressively increasing pain, or progressive neurological loss, further evaluation may be necessary to rule out the possibility of malignant nerve sheath tumors.

The post-treatment follow-up process is planned according to the pathological characteristics of the tumor and the treatment method applied.