Nasopharyngeal carcinoma CT: Difference between revisions

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{{Nasopharyngeal carcinoma}}
{{Nasopharyngeal carcinoma}}
{{CMG}} {{AE}}{{Faizan}}
{{CMG}}{{AE}}{{Homa}}{{Faizan}}
==Overview==
==Overview==
Nasopharyngeal carcinomas appear as soft tissue masses most commonly centred at the lateral [[nasopharyngeal]] recess (fossa of Rosenmüller).
CT scan may be helpful in the [[diagnosis]] of nasopharyngeal carcinoma and it's [[metastasis]] to the [[lymph node]]<nowiki/>s, [[intracranial space]], [[bone]], [[chest]], and [[liver]]. Findings on [[CT scan]] suggestive of nasopharyngeal carcinoma include [[soft tissue]] [[mass]]<nowiki/>es which most commonly centred at the [[lateral]] [[nasopharyngeal]] recess ([[fossa of Rosenmüller]]) and [[heterogeneous]] enhancement ofthe [[tumor]] in the [[Computed tomography|CT scan]] with [[contrast]].
==CT scan==
==CT scan==
[[Nasopharyngeal carcinomas]] appear as soft tissue masses most commonly centred at the lateral nasopharyngeal recess (fossa of Rosenmüller). Small lesions, are confined to the [[nasopharynx]] by the pharyngobasilar fascia, and are indistinguishable from prominent adenoidal tissue. Larger / more aggressive tumours may extend into any direction, eroding the base of skull and passing via the Eustachian tube, foramen lacerum, foramen ovale or directly through bone into the clivus, cavernous sinus and temporal bone. In such cases the bone has irregular margins where it has been destroyed, characteristic of aggressive processes. Soft tissue extension can occur in any direction, with irregular infiltrating margins. Following administration of contrast the tumour mass and nodal metastases usually demonstrate heterogeneous enhancement. Careful assessment of cervical lymph nodes is essential due to the high rate of nodal involvement at the time of diagnosis. The retropharyngeal nodes are usually the first affected, however in up to 35% of cases these nodes are skipped, and level II nodes involved first. Post radiotherapy fibrosis can mimic residual tumour on CT.<ref>http://radiopaedia.org/articles/nasopharyngeal-carcinoma</ref>
 
[[CT scan]] may be helpful in the [[diagnosis]] of nasopharyngeal carcinoma and it's [[invasion]]. [[CT scan]] can be useful in:<ref>{{Cite journal
| author = [[V. F. Chong]], [[Y. F. Fan]] & [[J. B. Khoo]]
| title = Nasopharyngeal carcinoma with intracranial spread: CT and MR characteristics
| journal = [[Journal of computer assisted tomography]]
| volume = 20
| issue = 4
| pages = 563–569
| year = 1996
| month = July-August
| pmid = 8708057
}}</ref><ref>{{Cite journal
| author = [[Alfred L. Weber]], [[Sharif al-Arayedh]] & [[Asma Rashid]]
| title = Nasopharynx: clinical, pathologic, and radiologic assessment
| journal = [[Neuroimaging clinics of North America]]
| volume = 13
| issue = 3
| pages = 465–483
| year = 2003
| month = August
| pmid = 14631685
}}</ref><ref>{{Cite journal
| author = [[Julian Goh]] & [[Keith Lim]]
| title = Imaging of nasopharyngeal carcinoma
| journal = [[Annals of the Academy of Medicine, Singapore]]
| volume = 38
| issue = 9
| pages = 809–816
| year = 2009
| month = September
| pmid = 19816641
}}</ref><ref name="CurranHackney1986">{{cite journal|last1=Curran|first1=Walter J.|last2=Hackney|first2=David B.|last3=Blitzer|first3=Peter H.|last4=Bilaniuk|first4=Larissa|title=The value of magnetic resonance imaging in treatment planning of nasopharyngeal carcinoma|journal=International Journal of Radiation Oncology*Biology*Physics|volume=12|issue=12|year=1986|pages=2189–2196|issn=03603016|doi=10.1016/0360-3016(86)90019-2}}</ref><ref name="ChongFan1997">{{cite journal|last1=Chong|first1=V F|last2=Fan|first2=Y F|title=Detection of recurrent nasopharyngeal carcinoma: MR imaging versus CT.|journal=Radiology|volume=202|issue=2|year=1997|pages=463–470|issn=0033-8419|doi=10.1148/radiology.202.2.9015075}}</ref><ref>{{cite book | last = Hermans | first = Robert | title = Head and Neck Cancer Imaging | publisher = Springer Berlin Heidelberg | location = Berlin, Heidelberg | year = 2006 | isbn = 3540684395 }}</ref><ref>{{cite book | last = Som | first = Peter | title = Head and neck imaging | publisher = Mosby | location = St. Louis | year = 2011 | isbn = 9780323053556 }}</ref>
*[[Diagnosis]] of nasopharyngeal carcinoma in [[Computed tomography|CT scan]] (with and without [[Contrast|contras]]<nowiki/>t), the characteristics are:
**<nowiki/>[[Soft tissue]] [[mass]]<nowiki/>es which most commonly centred at the lateral [[nasopharyngeal]] recess (fossa of Rosenmüller)  
**Heterogenous enh<nowiki/>ancement of the [[tumor]] in the [[Computed tomography|CT scan]] with [[contrast]]
*Detection of [[cervical lymph nodes]] involvement
*Detection of intracranial involvement
*Diagnosis of [[bone metastasis]], by detection of [[lytic]] or [[Sclerotic metastasis|sclerotic]] lesions,the most common [[metastatic]] regions are:
**[[Eustachian tube]]
**Base of [[skull]]
**[[Foramen lacerum]]
**[[Foramen ovale]]
**[[Cavernous sinus]]
**[[Temporal bone]]
*Detection of the [[metastasis]] to [[chest]] and [[liver]]
[[File:Nasopharyngeal carcinoma CT.jpg|500px|none|thumb|https://radiopaedia.org/cases/nasopharyngeal-carcinoma-non-keratising?lang=us]]
 
[[File:Nasopharyngeal carcinoma CT 2.jpg|500px|none|thumb|https://radiopaedia.org/cases/nasopharyngeal-carcinoma-non-keratising?lang=us]]
 
[[File:Nasopharyngeal carcinoma CT 3.jpg|500px|none|thumb|https://radiopaedia.org/cases/nasopharyngeal-carcinoma-non-keratising?lang=us]]
 
 
==References==
==References==
{{Reflist|2}}
{{Reflist|2}}
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Latest revision as of 22:53, 29 July 2020

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Homa Najafi, M.D.[2]Faizan Sheraz, M.D. [3]

Overview

CT scan may be helpful in the diagnosis of nasopharyngeal carcinoma and it's metastasis to the lymph nodes, intracranial space, bone, chest, and liver. Findings on CT scan suggestive of nasopharyngeal carcinoma include soft tissue masses which most commonly centred at the lateral nasopharyngeal recess (fossa of Rosenmüller) and heterogeneous enhancement ofthe tumor in the CT scan with contrast.

CT scan

CT scan may be helpful in the diagnosis of nasopharyngeal carcinoma and it's invasion. CT scan can be useful in:[1][2][3][4][5][6][7]

https://radiopaedia.org/cases/nasopharyngeal-carcinoma-non-keratising?lang=us
https://radiopaedia.org/cases/nasopharyngeal-carcinoma-non-keratising?lang=us
https://radiopaedia.org/cases/nasopharyngeal-carcinoma-non-keratising?lang=us


References

  1. V. F. Chong, Y. F. Fan & J. B. Khoo (1996). "Nasopharyngeal carcinoma with intracranial spread: CT and MR characteristics". Journal of computer assisted tomography. 20 (4): 563–569. PMID 8708057. Unknown parameter |month= ignored (help)
  2. Alfred L. Weber, Sharif al-Arayedh & Asma Rashid (2003). "Nasopharynx: clinical, pathologic, and radiologic assessment". Neuroimaging clinics of North America. 13 (3): 465–483. PMID 14631685. Unknown parameter |month= ignored (help)
  3. Julian Goh & Keith Lim (2009). "Imaging of nasopharyngeal carcinoma". Annals of the Academy of Medicine, Singapore. 38 (9): 809–816. PMID 19816641. Unknown parameter |month= ignored (help)
  4. Curran, Walter J.; Hackney, David B.; Blitzer, Peter H.; Bilaniuk, Larissa (1986). "The value of magnetic resonance imaging in treatment planning of nasopharyngeal carcinoma". International Journal of Radiation Oncology*Biology*Physics. 12 (12): 2189–2196. doi:10.1016/0360-3016(86)90019-2. ISSN 0360-3016.
  5. Chong, V F; Fan, Y F (1997). "Detection of recurrent nasopharyngeal carcinoma: MR imaging versus CT". Radiology. 202 (2): 463–470. doi:10.1148/radiology.202.2.9015075. ISSN 0033-8419.
  6. Hermans, Robert (2006). Head and Neck Cancer Imaging. Berlin, Heidelberg: Springer Berlin Heidelberg. ISBN 3540684395.
  7. Som, Peter (2011). Head and neck imaging. St. Louis: Mosby. ISBN 9780323053556.

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