Life With Ependymoma

What is Ependymoma?

Ependymoma is a tumor that arises from the ependyma, a tissue of the central nervous system. Usually, in pediatric cases the location isintracranial, while in adults it is spinal. The common location of intracranial ependymoma is the fourth ventricle. Rarely, ependymoma can occur in the pelvic cavity.

Syringomyelia can be caused by an ependymoma. Ependymomas are also seen with neurofibromatosis type II.

These tumors are classified according to the presumed cell of origin. The most common types of cells in the nervous system are neurons and glial cells, although tumors from neurons are rare. Glial cells are the supportive cells of the brain and tumors arising from these cells are called gliomas. Subtypes of glial cells of the CNS include:

• Astrocytes cells
• Oligodendrocytes cells
• Ependymal cells

Diagnosis

      A physician will perform a variety of diagnostic procedures to determine the exact type of tumor and whether the tumor has spread. These may include:

• physical exam - including neurologic function tests including: reflexes, muscle strength, eye and mouth movement, coordination and alertness.
• magnetic resonance imaging (MRI) - to produce detailed images of organs and structures within the body and/or spine

MRI scan of Ependymoma of 4.ventricle



• computerized tomography scan (also called a CT or CAT scan) – used to capture a detailed view of the body, in some cases



 CT scan showing a high grade supratentorial ependymoma in the left parietal region .


There is significant surrounding brain edema with mild midline shift.







• biopsy – a tissue sample taken from the tumor during a surgical procedure to provide information about the type of tumor
• lumbar puncture (also called an LP or spinal tap) - to remove a small sample of cerebrospinal fluid (CSF) and determine if any tumor cells have spread

Morphology

Ependymomas are composed of cells with regular, round to oval nuclei. There is a variably dense fibrillary background. Tumor cells may form gland-like round or elongated structures that resemble the embryologic ependymal canal, with long, delicate processes extending into the lumen; more frequently present are perivascular pseudorosettes in which tumor cells are arranged around vessels with an intervening zone consisting of thin ependymal processes directed toward the wall of the vessel.

It has been suggested that ependymomas are derived from radial glia.

Pathophysiology

Ependymomas are cellular and exhibit relatively low mitotic areas. Histological features include perivascular pseudorosettes and ependymal rosettes.

Anaplastic epenymoma

Anaplastic ependymoma is a type of malignant ependymomas tumor commonly found in young patients. These tumors grow rapidly and many people who develop them will experience complications or even die. This is especially true if the tumor is not caught and treated early. The majority of these growths, although rare, appear in children and adults that are younger than 25 years old. Tumors like this can appear in older adults, but are much more rare. 

The diagnosis of an anaplastic ependymoma can sometimes be difficult because the symptoms associated with the tumor are also associated with other diseases and maladies. 

Myxopapillary ependymoma (MEPN) is a slow-growing ependymoma (a type of glioma, which is a tumor that arises from the supportive tissue of the brain). They tend to occur in the lower part of the spinal column and are usually considered to be benign, low-grade or grade I tumors. The age of diagnosis ranges from 6 to 82 years.

Myxopapillary ependymomas are considered a distinct variant of ependymoma, occurring almost exclusively in the region of the cauda equina. These tumors are histologically characterized by elongated tumor cells arranged in a perivascular papillary pattern around central cores of mucinous or hyalinized perivascular stroma.

Subependymomas are nodular tumors composed of nests of ependymal cells in a dense glial fibrillary matrix. The majority of subependymomas are well delineated and arise as nodules in the fourth and lateral ventricles. They are thought to have a different, more benign prognosis than other types of ependymomas that occur in the brain.

The prognosis for a subependymoma is better than for most ependymal tumors, and is considered a grade I/IV tumor in the World Health Organization (WHO) classification.

This tumor forms from ependymal cells, and is a variation of an ependymoma.