neuro q

[kartagener]

A 2cm spherical mass located in the junction between white and gray matter in the right lateral hemisphere.what is the lesion?

a.astrocytoma
b. meningioma
c.ependymoma
d.glioblastoma multiforme
e.metastatic carcinoma

[student-2]

The answer is A (neuro is my weakest area so if anyone wants to give explanations it would be appreciated)

[md90]

A 2cm spherical mass located in the junction between white and gray matter in the right lateral hemisphere.what is the lesion?
a.astrocytoma
b. meningioma
c.ependymoma
d.glioblastoma multiforme
e.metastatic carcinoma

Answer: A. astrocytoma, why? These are my reasons dependent on what I remember... Astrocytoma--usually located somewhere within the cerebral hemispheres, optic chiasm, pons, cerebellum, hypothalamus... in other words, it has a broader spectrum of areas from white and gray matters...

Why I think other answers are wrong:
E. Metastatic carcinoma--metastatic means invasive, and this does not appear to invasive...
D. Glioblastoma multiforme--type 4 astrocytoma, and has the presence of small areas of necrotizing tissue..
C. ependymoma--usually located within the inner layer of the lateral cerebral hemisphere
B. meningioma--usually will come from the dura mater and/or the arachnoid layer...

[kartagener]

Bits of info was amiss, sorry dozed off: CT scan was from an adult patient presenting with persistent headache and yes it was in the lateral aspect of the cerebral hemisphere.
Got the answer key today.
E. Metastatic carcinoma
Statistically metastases>astrocytoma(including glioblastoma)>meningioma>pituitary tumor.Location at the jxn of cortical gray and white matter is also typical for metastatic disease as is the round shape.
Astrocytoma, typically arise from the white matter and irregularly shaped.Ependymoma is rare, and are located in the ventricular linings. Glioblastoma crosses between the cerebral hemisphere presenting a butterfly lesion.

[md90]

thanks kartagener.. for coming back and filling in the information and explaining the answer... greatly appreciate it!!

[catch22]

yup junction typical for metastatic ca