Pleomorphic adenoma MRI: Difference between revisions
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{{Pleomorphic adenoma}} | {{Pleomorphic adenoma}} | ||
{{CMG}}; {{AE}} | {{CMG}}; {{AE}} {{M.N}} | ||
==Overview== | ==Overview== | ||
[[MRI]] is the [[imaging]] modality of choice for pleomorphic adenoma. The findings on T1-weighted images are [[homogeneous]] intensity while on T2 it shows marked hyperintensity which reflects abundant myxochondroid [[stroma]]. On Gd-T1 it shows [[heterogeneous]] enhancement. | |||
==MRI== | ==MRI== | ||
*[[MRI]] is the [[imaging]] modality of choice for pleomorphic adenoma.<ref name="pmid8881252">{{cite journal |vauthors=Ikeda K, Katoh T, Ha-Kawa SK, Iwai H, Yamashita T, Tanaka Y |title=The usefulness of MR in establishing the diagnosis of parotid pleomorphic adenoma |journal=AJNR Am J Neuroradiol |volume=17 |issue=3 |pages=555–9 |date=March 1996 |pmid=8881252 |doi= |url=}}</ref> | |||
*[[MRI]] [[criteria]] for the [[diagnosis]] of pleomorphic adenoma include the following:<ref name="ZaghiHendizadeh2014">{{cite journal|last1=Zaghi|first1=Soroush|last2=Hendizadeh|first2=Leenoy|last3=Hung|first3=Tony|last4=Farahvar|first4=Salar|last5=Abemayor|first5=Elliot|last6=Sepahdari|first6=Ali R.|title=MRI criteria for the diagnosis of pleomorphic adenoma: a validation study|journal=American Journal of Otolaryngology|volume=35|issue=6|year=2014|pages=713–718|issn=01960709|doi=10.1016/j.amjoto.2014.07.013}}</ref> | |||
**Bright T2-signal | |||
**Sharp margins | |||
**[[Heterogeneous]] [[nodular]] enhancement | |||
[ | **Lobulated contours | ||
* | **T2-dark rim | ||
*[ | *On T1-weighted images: | ||
** Pleomorphic adenoma's show [[homogeneous]] intensity. <ref name="HisatomiAsaumi2003">{{cite journal|last1=Hisatomi|first1=Miki|last2=Asaumi|first2=Jun-ichi|last3=Yanagi|first3=Yoshinobu|last4=Konouchi|first4=Hironobu|last5=Matsuzaki|first5=Hidenobu|last6=Honda|first6=Yasutoshi|last7=Kishi|first7=Kanji|title=Assessment of pleomorphic adenomas using MRI and dynamic contrast enhanced MRI|journal=Oral Oncology|volume=39|issue=6|year=2003|pages=574–579|issn=13688375|doi=10.1016/S1368-8375(03)00040-X}}</ref> | |||
*On T2-weighted images: | |||
**Marked hyperintensity reflects abundant myxochondroid [[stroma]].<ref name="pmid29845358">{{cite journal |vauthors=Kato H, Kawaguchi M, Ando T, Mizuta K, Aoki M, Matsuo M |title=Pleomorphic adenoma of salivary glands: common and uncommon CT and MR imaging features |journal=Jpn J Radiol |volume=36 |issue=8 |pages=463–471 |date=August 2018 |pmid=29845358 |doi=10.1007/s11604-018-0747-y |url=}}</ref> | |||
**Hypointensity reflects the [[fibrous capsule]] of the [[tumor]].<ref name="pmid29845358">{{cite journal |vauthors=Kato H, Kawaguchi M, Ando T, Mizuta K, Aoki M, Matsuo M |title=Pleomorphic adenoma of salivary glands: common and uncommon CT and MR imaging features |journal=Jpn J Radiol |volume=36 |issue=8 |pages=463–471 |date=August 2018 |pmid=29845358 |doi=10.1007/s11604-018-0747-y |url=}}</ref> | |||
*On Gd-T1weighted images: | |||
* | **It shows [[heterogeneous]] enhancement.<ref name="HisatomiAsaumi2003">{{cite journal|last1=Hisatomi|first1=Miki|last2=Asaumi|first2=Jun-ichi|last3=Yanagi|first3=Yoshinobu|last4=Konouchi|first4=Hironobu|last5=Matsuzaki|first5=Hidenobu|last6=Honda|first6=Yasutoshi|last7=Kishi|first7=Kanji|title=Assessment of pleomorphic adenomas using MRI and dynamic contrast enhanced MRI|journal=Oral Oncology|volume=39|issue=6|year=2003|pages=574–579|issn=13688375|doi=10.1016/S1368-8375(03)00040-X}}</ref> | ||
*[ | [[File:Pleomorphic adenoma MRI.gif|thumb|none|300px|Pleomorphic adenoma of left parotid gland MRI,Case courtesy of Dr Alexandra Stanislavsky, Radiopaedia.org, rID: 14618Case courtesy of Dr Alexandra Stanislavsky, <a href="https://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="https://radiopaedia.org/cases/14618">rID: 14618</a>]] | ||
==References== | ==References== | ||
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{{WS}} | {{WS}} | ||
[[Category: | |||
[[Category: Otolaryngology]] | |||
[[Category: Medicine]] | |||
[[Category: Oncology]] | |||
[[Category: Surgery]] | |||
[[Category: Radiology]] | |||
[[Category: Up-To-Date]] | |||
Latest revision as of 19:00, 28 January 2019
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Maneesha Nandimandalam, M.B.B.S.[2]
Overview
MRI is the imaging modality of choice for pleomorphic adenoma. The findings on T1-weighted images are homogeneous intensity while on T2 it shows marked hyperintensity which reflects abundant myxochondroid stroma. On Gd-T1 it shows heterogeneous enhancement.
MRI
- MRI is the imaging modality of choice for pleomorphic adenoma.[1]
- MRI criteria for the diagnosis of pleomorphic adenoma include the following:[2]
- Bright T2-signal
- Sharp margins
- Heterogeneous nodular enhancement
- Lobulated contours
- T2-dark rim
- On T1-weighted images:
- Pleomorphic adenoma's show homogeneous intensity. [3]
- On T2-weighted images:
- Marked hyperintensity reflects abundant myxochondroid stroma.[4]
- Hypointensity reflects the fibrous capsule of the tumor.[4]
- On Gd-T1weighted images:
- It shows heterogeneous enhancement.[3]
References
- ↑ Ikeda K, Katoh T, Ha-Kawa SK, Iwai H, Yamashita T, Tanaka Y (March 1996). "The usefulness of MR in establishing the diagnosis of parotid pleomorphic adenoma". AJNR Am J Neuroradiol. 17 (3): 555–9. PMID 8881252.
- ↑ Zaghi, Soroush; Hendizadeh, Leenoy; Hung, Tony; Farahvar, Salar; Abemayor, Elliot; Sepahdari, Ali R. (2014). "MRI criteria for the diagnosis of pleomorphic adenoma: a validation study". American Journal of Otolaryngology. 35 (6): 713–718. doi:10.1016/j.amjoto.2014.07.013. ISSN 0196-0709.
- ↑ 3.0 3.1 Hisatomi, Miki; Asaumi, Jun-ichi; Yanagi, Yoshinobu; Konouchi, Hironobu; Matsuzaki, Hidenobu; Honda, Yasutoshi; Kishi, Kanji (2003). "Assessment of pleomorphic adenomas using MRI and dynamic contrast enhanced MRI". Oral Oncology. 39 (6): 574–579. doi:10.1016/S1368-8375(03)00040-X. ISSN 1368-8375.
- ↑ 4.0 4.1 Kato H, Kawaguchi M, Ando T, Mizuta K, Aoki M, Matsuo M (August 2018). "Pleomorphic adenoma of salivary glands: common and uncommon CT and MR imaging features". Jpn J Radiol. 36 (8): 463–471. doi:10.1007/s11604-018-0747-y. PMID 29845358.