Brain tumor CT: Difference between revisions
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==Overview== | ==Overview== | ||
Imaging plays a central role in the diagnosis of brain tumors. | Imaging plays a central role in the diagnosis of brain tumors. On head CT scan, brain cancer is characterized by hypodense mass lesions. | ||
==CT== | ==CT== | ||
Benign brain tumors often show up as hypodense (darker than brain tissue) mass lesions on cranial CT-scans. [[Contrast agent]] uptake, sometimes in characteristic patterns, can be demonstrated on either CT | *Benign brain tumors often show up as '''hypodense''' (darker than brain tissue) mass lesions on cranial CT-scans. [[Contrast agent]] uptake, sometimes in characteristic patterns, can be demonstrated on either CT in most malignant primary and metastatic brain tumors. This is due to the fact that these tumors disrupt the normal functioning of the [[blood-brain barrier]] and lead to an increase in its [[permeability]]. | ||
*The speed of contrast-enhanced CT is desirable for evaluating clinically unstable patients. CT is superior for detecting calcification, skull lesions, and hyperacute hemorrhage (bleeding less than 24-hours old) and helps direct differential diagnosis as well as immediate management. | |||
==References== | ==References== | ||
{{Reflist|2}} | {{Reflist|2}} | ||
{{WH}} | |||
{{WS}} | |||
[[Category:Disease]] | [[Category:Disease]] | ||
[[Category:Brain]] | [[Category:Brain]] | ||
[[Category:Neurology]] | [[Category:Neurology]] | ||
[[Category:Up-To-Date]] | |||
[[Category:Oncology]] | |||
[[Category:Medicine]] | |||
[[Category:Neurosurgery]] | |||
Latest revision as of 20:41, 29 July 2020
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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Brain tumor Microchapters |
Overview
Imaging plays a central role in the diagnosis of brain tumors. On head CT scan, brain cancer is characterized by hypodense mass lesions.
CT
- Benign brain tumors often show up as hypodense (darker than brain tissue) mass lesions on cranial CT-scans. Contrast agent uptake, sometimes in characteristic patterns, can be demonstrated on either CT in most malignant primary and metastatic brain tumors. This is due to the fact that these tumors disrupt the normal functioning of the blood-brain barrier and lead to an increase in its permeability.
- The speed of contrast-enhanced CT is desirable for evaluating clinically unstable patients. CT is superior for detecting calcification, skull lesions, and hyperacute hemorrhage (bleeding less than 24-hours old) and helps direct differential diagnosis as well as immediate management.