What is rosette forming tumor?
Rosette-forming glioneuronal tumor (RGNT) is a rare variety of slow growing mixed glioneuronal tumor involving primarily fourth ventricular region and occurring predominantly in young adults. We present a case of a 16-year-old boy who presented with dizziness and occipital headache.
What is a Glioneuronal tumor?
Glioneuronal tumors are an increasingly recognized cause of partial seizures that occur primarily in children and young adults [1, 2]. These are tumors with an admixture of glial and neuronal components. Both cell types are thought to be part of the same neoplastic process.
What tumor develops in the fourth ventricle?
Ependymomas of the fourth ventricle. Ependymomas are rare brain tumors that arise from the cells that line CSF containing structures such as the central canal of the spinal cord, or the surface of the cerebral ventricles. They are rare, with an incidence of only about 2-4/million. They occur in all age groups.
What is diffuse Leptomeningeal Glioneuronal tumor?
Diffuse leptomeningeal disseminated glioneuronal tumor (DL-GNT) is a rare brain tumor that presents as a plaque-like subarachnoid tumor, commonly involving the basal cisterns and interhemispheric fissure of children but lacking intraparenchymal tumor.
What is a rosette flower?
In botany, a rosette is a circular arrangement of leaves or of structures resembling leaves. In flowering plants, rosettes usually sit near the soil. In bryophytes and algae, a rosette results from the repeated branching of the thallus as the plant grows, resulting in a circular outline.
How does medulloblastoma spread?
Medulloblastoma tends to spread through cerebrospinal fluid (CSF) — the fluid that surrounds and protects your brain and spinal cord — to other areas around the brain and spinal cord. This tumor rarely spreads to other areas of the body.
Are Glioneuronal tumors malignant?
Malignant glioneuronal tumors (MGnt) other than the classical anaplastic ganglioglioma are even more unusual (9). These neoplasms may have malignant features only in the neuronal component, or in both the glial and the neuronal components.
What is Leptomeningeal disease?
Leptomeningeal disease occurs when cancer cells migrate from your breast, lung, or some other part of your body to your cerebrospinal fluid (CSF). This liquid circulates nutrients and chemicals to the brain and spinal cord.
What is leptomeningeal carcinomatosis?
Leptomeningeal Carcinomatosis (LC) is a rare complication of cancer in which cancerous cells spread to the membranes (meninges) that covers the brain and spinal cord.
What is rosette-forming glioneuronal tumor of the fourth ventricle?
Rosette-forming glioneuronal tumor (RGNT) of the fourth ventricle is a rare tumor included as a novel glioneuronal neoplasm in the 2007 World Health Organization classification of brain tumors. A 15-year-old female patient presented with RGNT of the fourth ventricle manifesting as headache persisting for one month.
Is there such a thing as a rosette tumor?
Rosette-forming glioneuronal tumors (RGNTs) are rare, usually midline, tumors that involve the fourth ventricle and/or aqueduct of Sylvius.
What is the pathology of a glioneuronal tumor?
Also stromal alterations indicative of chronicity and degeneration, vascular sclerosis, dense collagenization, microcalcifications, hemosiderin deposits, focal infarction