Pituitary adenoma CT: Difference between revisions

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{{CMG}} {{AE}} {{AAM}}
{{CMG}} {{AE}} {{AAM}}
==Overview==
==Overview==
 
On head [[Computed tomography|CT scan]] may be helpful in the [[diagnosis]] of pituitary adenoma. Findings on [[Computed tomography|CT scan]] suggestive of pituitary adenoma include a large [[suprasellar]] mass that invade surrounding structures, [[calcification]], and rarely [[hemorrhage]].


==Key CT Scan Findings in Pituitary Adenoma==
==Key CT Scan Findings in Pituitary Adenoma==
===Microadenoma===
*Historically, before the advent of [[MRI]], the pituitary was imaged with [[Computed tomography|CT scan]].
*Although [[CT scan]] is able to detect up to 80-90% of microadenomas (5-10mm in size), it has less sensitivity to smaller adenomas (less than 5mm in size).<ref name="radio5">Pituitary Microadenoma. Dr Amir Rezaee and Dr Frank Gaillard. Radiopaedia.org 2015. http://radiopaedia.org/articles/pituitary-microadenoma</ref>
===Macroadenoma===
===Macroadenoma===
*A solid [[suprasellar]] mass that typically has an [[attenuation]] similar to brain (30-40 HU) and demonstrates moderate [[contrast]] enhancement is highly suggestive of pituitary macroadenoma.
*A large [[suprasellar]] mass that typically characterized by:<ref name="radio">Pituitary Macroadenoma. Dr Bruno Di Muzio and Dr Yuranga Weerakkody. Radiopaedia.org 2015. http://radiopaedia.org/articles/pituitary-macroadenoma-1</ref>
*Calcification and hemorrhage are rarely seen.<ref name=radio>Pituitary Macroadenoma. Dr Bruno Di Muzio and Dr Yuranga Weerakkody. Radiopaedia.org 2015. http://radiopaedia.org/articles/pituitary-macroadenoma-1</ref><ref name=Radio>age courtesy of Dr Gagandeep Choudhary. http://www.radiopaedia.org Radiopaedia  (http://radiopaedia.org/cases/pituitary-macroadenoma). http://radiopaedia.org/licence Creative Commons BY-SA-NC.</ref>
:*An [[attenuation]] similar to that of the brain (30-40 HU)
:*Moderate [[contrast]] enhancement
:*Invasion of the surrounding structures
*[[Calcification]] and [[hemorrhage]] are rarely seen.
<gallery>
<gallery>
Image:
Image:


Pituitary adenoma.jpg|Image courtesy of Dr Gagandeep Choudhary. http://www.radiopaedia.org Radiopaedia  (http://radiopaedia.org/cases/pituitary-macroadenoma). http://radiopaedia.org/licence Creative Commons BY-SA-NC.
Pituitary adenoma.jpg|Large hyperdense sellar mass extending into the suprasellar region and causing displacement of surrounding structures. <ref name=radio1>Image courtesy of Dr. Gagandeep Choudhary. [http://www.radiopaedia.org Radiopaedia] (original file [http://radiopaedia.org/cases/pituitary-macroadenoma ''here'']). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
 
Pituitary adenoma.1.jpg|Image courtesy of Dr Gagandeep Choudhary. http://www.radiopaedia.org Radiopaedia (http://radiopaedia.org/cases/pituitary-macroadenoma). http://radiopaedia.org/licence Creative Commons BY-SA-NC.


Pituitary-macroadenoma-CT-01.jpg|
Pituitary adenoma.1.jpg|Large hyperdense sellar mass extending into the suprasellar region and causing displacement of surrounding structures. <ref name=radio1>Image courtesy of Dr. Gagandeep Choudhary. [http://www.radiopaedia.org Radiopaedia] (original file [http://radiopaedia.org/cases/pituitary-macroadenoma ''here'']). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>


Image:Pituitary-macroadenoma-CT-02.jpg
Pituitary-macroadenoma-CT-01.jpg|There is a well defined round isodense lesion noted in the pituitary fossa, the lesion is widening the sella.<ref name=radiopaedia> Case contributed by Radswiki. [http://www.radiopaedia.org] (original file [http://radiopaedia.org/cases/pituitary-adenoma]).</ref>
Image:Pituitary-macroadenoma-CT-02.jpg|There is a well defined round isodense lesion noted in the pituitary fossa, the lesion is widening the <ref name=radiopaedia> Case contributed by Radswiki. [http://www.radiopaedia.org] (original file [http://radiopaedia.org/cases/pituitary-adenoma]).</ref>
</gallery>
</gallery>
===Microadenoma===
*Historically, before the advent of MRI, the pituitary was imaged with CT scan.
*Although CT scan is able to detect up to 80-90% of microadenomas (5-10mm in size), it has less sensitivity to smaller adenomas (less than 5mm in size).<ref name=radio>Pituitary Microadenoma. Dr Amir Rezaee and Dr Frank Gaillard. Radiopaedia.org 2015. http://radiopaedia.org/articles/pituitary-microadenoma</ref>
==References==
==References==
{{Reflist|2}}
{{Reflist|2}}
[[Category:Disease]]
[[Category:Disease]]
[[Category:Endocrinology]]
[[Category:Endocrinology]]
[[Category:Mature chapter]]
[[Category:Mature chapter]]
[[Category:Up-To-Date]]
[[Category:Oncology]]
[[Category:Medicine]]
[[Category:Neurology]]
[[Category:Neurosurgery]]
[[Category:Endocrinology]]

Latest revision as of 19:48, 2 October 2019

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [3] Associate Editor(s)-in-Chief: Ahmad Al Maradni, M.D. [4]

Overview

On head CT scan may be helpful in the diagnosis of pituitary adenoma. Findings on CT scan suggestive of pituitary adenoma include a large suprasellar mass that invade surrounding structures, calcification, and rarely hemorrhage.

Key CT Scan Findings in Pituitary Adenoma

Microadenoma

  • Historically, before the advent of MRI, the pituitary was imaged with CT scan.
  • Although CT scan is able to detect up to 80-90% of microadenomas (5-10mm in size), it has less sensitivity to smaller adenomas (less than 5mm in size).[1]

Macroadenoma

  • An attenuation similar to that of the brain (30-40 HU)
  • Moderate contrast enhancement
  • Invasion of the surrounding structures
  • Large hyperdense sellar mass extending into the suprasellar region and causing displacement of surrounding structures. [3]

    Large hyperdense sellar mass extending into the suprasellar region and causing displacement of surrounding structures. [3]

  • Large hyperdense sellar mass extending into the suprasellar region and causing displacement of surrounding structures. [3]

    Large hyperdense sellar mass extending into the suprasellar region and causing displacement of surrounding structures. [3]

  • There is a well defined round isodense lesion noted in the pituitary fossa, the lesion is widening the sella.[4]

    There is a well defined round isodense lesion noted in the pituitary fossa, the lesion is widening the sella.[4]

  • There is a well defined round isodense lesion noted in the pituitary fossa, the lesion is widening the [4]

    There is a well defined round isodense lesion noted in the pituitary fossa, the lesion is widening the [4]

References

  1. ↑ Pituitary Microadenoma. Dr Amir Rezaee and Dr Frank Gaillard. Radiopaedia.org 2015. http://radiopaedia.org/articles/pituitary-microadenoma
  2. ↑ Pituitary Macroadenoma. Dr Bruno Di Muzio and Dr Yuranga Weerakkody. Radiopaedia.org 2015. http://radiopaedia.org/articles/pituitary-macroadenoma-1
  3. ↑ 3.0 3.1 Image courtesy of Dr. Gagandeep Choudhary. Radiopaedia (original file here). Creative Commons BY-SA-NC
  4. ↑ 4.0 4.1 Case contributed by Radswiki. [1] (original file [2]).
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