Pleomorphic adenoma MRI
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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.