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1.

Medulloblastoma

Medulloblastoma is the most common brain tumor in children. It accounts for 16% of all pediatric brain tumors, and 40% of all cerebellar tumors in childhood are medulloblastoma. Medulloblastoma occurs bimodally, with peak incidences between 3 and 4 years and 8 and 9 years of age. Approximately 10 to 15% of medulloblastomas are diagnosed in infancy. Medulloblastoma accounts for less than 1% of central nervous system (CNS) tumors in adults, with highest incidence in adults 20 to 34 years of age. In 1 to 2% of patients, medulloblastoma is associated with Gorlin syndrome (109400), a nevoid basal carcinoma syndrome. Medulloblastoma also occurs in up to 40% of patients with Turcot syndrome (276300). Medulloblastoma is thought to arise from neural stem cell precursors in the granular cell layer of the cerebellum. Standard treatment includes surgery, chemotherapy, and, depending on the age of the patient, radiation therapy (Crawford et al., 2007). [from OMIM]

MedGen UID:
7517
Concept ID:
C0025149
Neoplastic Process
2.

Medulloblastoma

A rapidly growing embryonic tumor arising in the posterior part of the cerebellar vermis and neuroepithelial roof of the fourth ventricle in children. More rarely, medulloblastoma arises in the cerebellum in adults. [from HPO]

MedGen UID:
505388
Concept ID:
CN002609
Finding
3.

Error occurred: cannot get document summary

ID:
137646

4.

Frequent

Coming at short intervals or in great quantities. [from NCI]

MedGen UID:
87144
Concept ID:
C0332183
Temporal Concept
5.

Heterogeneous

The production of the same or similar phenotypes (observed biochemical, physiological, and morphological characteristics of a person determined by his/her genotype) by different genetic mechanisms. There are two types: (1) allelic heterogeneity - when different alleles at a locus can produce variable expression of a condition; and (2) locus heterogeneity - the term used to describe disease in which mutations at different loci can produce the same disease phenotype. [from NCI]

MedGen UID:
67020
Concept ID:
C0242960
Organism Attribute
6.

Intracranial Neoplasm

A benign or malignant neoplasm that arises from or metastasizes to structures within the cranium. This includes meningeal and other tumors that occur in the spaces that surround the brain, and neoplasms of the brain. [from NCI]

MedGen UID:
287152
Concept ID:
C1527390
Neoplastic Process
7.

Epithelial Neoplasm

A benign or malignant neoplasm that arises from and is composed of epithelial cells. This category include adenomas, papillomas, and carcinomas. [from NCI]

MedGen UID:
277963
Concept ID:
C1368683
Neoplastic Process
8.

Cancer, Embryonal

MedGen UID:
199639
Concept ID:
C0751364
Neoplastic Process
9.

Ependymoastrocytoma

MedGen UID:
155907
Concept ID:
C0751677
Neoplastic Process
10.

Polar Spongioblastoma

A lesion characterized by the presence of neoplastic neuroepithelial cells with palisading nuclei. This lesion implies a morphologic growth pattern and it is not considered a clinicopathological entity. [from NCI]

MedGen UID:
154309
Concept ID:
C0555199
Neoplastic Process
11.

Ependymoblastoma

A rare type of primitive neuroectodermal tumor (PNET) that usually occurs in young children under the age of 2 and is histologically distinguished by the production of ependymoblastic rosettes. It is associated with an aggressive course and a poor prognosis. [from SNOMEDCT_US]

MedGen UID:
152150
Concept ID:
C0700367
Neoplastic Process
12.

Spongioblastoma

MedGen UID:
137785
Concept ID:
C0334584
Neoplastic Process
13.

Astroblastoma

A rare glial neoplasm more commonly found in young adults. It is characterized by tumor cells with characteristics suggestive of an astrocytic origin (positive for GFAP), arranged perivascularly. The cells have broad, non-tapering processes radiating towards a central blood vessel. The biologic behavior of astroblastomas is variable, so no WHO grade has been established, yet. (Adapted from WHO.) [from NCI]

MedGen UID:
90811
Concept ID:
C0334587
Neoplastic Process
14.

Neoplasm of the central nervous system

A neoplasm of the central nervous system. [from HPO]

MedGen UID:
88335
Concept ID:
C0085136
Neoplastic Process
15.

Medulloepithelioma

A primitive neuroectodermal tumor that originates from the cells of the embryonic medullary canal. [from HPO]

MedGen UID:
87272
Concept ID:
C0334596
Neoplastic Process
16.

Adult Medulloblastoma

A medulloblastoma occurring in adults. [from NCI]

MedGen UID:
78898
Concept ID:
C0278876
Neoplastic Process
17.

Childhood Medulloblastoma

A medulloblastoma occurring in children. [from NCI]

MedGen UID:
75829
Concept ID:
C0278510
Neoplastic Process
18.

Primitive neuroectodermal tumor

An aggressive malignant embryonal neoplasm arising from the central nervous system. This category includes ependymoblastoma, medulloepithelioma, and supratentorial primitive neuroectodermal tumor. It usually follows an aggressive clinical course. [from NCI]

MedGen UID:
64627
Concept ID:
C0206663
Neoplastic Process
19.

Neuroepithelial neoplasm

Neoplasms composed of neuroepithelial cells, which have the capacity to differentiate into NEURONS, oligodendrocytes, and ASTROCYTES. The majority of craniospinal tumors are of neuroepithelial origin. (From Dev Biol 1998 Aug 1;200(1):1-5) [from MeSH]

MedGen UID:
60215
Concept ID:
C0206715
Neoplastic Process
20.

Neuroectodermal neoplasm

A neoplasm arising in the neuroectoderm, the portion of the ectoderm of the early embryo that gives rise to the central and peripheral nervous systems, including some glial cells. [from HPO]

MedGen UID:
60072
Concept ID:
C0206093
Neoplastic Process
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