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Medicine

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Neurology

Question
11 out of 14
 

Most common site of sub ependymal astrocytoma (giant cell): (AIIMS Nov 2009)



A 3rd ventricle

B Foramen of Munro

C Temporal horn of lateral ventricle

D 4th ventricle

Ans. B

Foramen of Munro

Subependymal Giant cell Astrocytomas (SEGCA)

1). Subependymal Giant cell Astrocytomas are low grade non filtrating (benign) variants of astrocytomas.

2). They are characteristically but not always associated with tuberous sclerosis

3). Occur most frequently in patients with autosomal dominant phakomatosis tuberous sclerosis

4). The most common site of SEGCA is the ependymal wall of lateral ventricle near the foramen of munro and these tumors tend to grow towards the foramen of munro (leading to obstructive hydrocephalus)

5). Pathologically lesions are composed of Giant cells

6). Candle dripping radiographic appearance is characteristic

7). These tumors predominantly occur is children (lst decade)

8). These tumors are essentially benign

9). Total Gross resection is the treatment of choice

Fig:Cerebral tumour of the medial part of the temporal lobe causing distortion of midbrain & third nerve.

Fig:Downward displacement of the cerebellar tonsils below the level of the foramen magnum. The shaded area represents the position of the cerebellum that is displaced.

Neurology Flashcard List

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