Adenoid cystic carcinoma of the salivary glands
Adenoid cystic carcinomas arise more commonly in the minor salivary glands (~55%) than in the major salivary glands. They are the most common sinonasal tumors of salivary orign. They are locally aggressive with a propensity for perineural spread 5.
Generally, a distinction is made radiologically between low-grade and high-grade adenoid cystic carcinomas. Low-grade tumors tend to be well-defined, in contradistinction to high-grade tumors, which appear infiltrative. However, both subtypes are usually homogeneously enhancing after contrast administration.
- T1: hypo- to isointense
- T2: slightly hyperintense, with higher grades being markedly hyperintense
- T1 C+ (Gd): homogeneous enhancement
- 1. Dubergé T, Bénézery K, Resbeut M et-al. [Adenoid cystic carcinoma of the head and neck: a retrospective series of 169 cases]. Cancer Radiother. 16 (4): 247-56. doi:10.1016/j.canrad.2012.02.003 - Pubmed citation
- 2. Du LX, Yuan JP, Guan H et-al. [Magnetic resonance imaging for diagnosis of parotid malignant tumors and the pathological basis]. Nan Fang Yi Ke Da Xue Xue Bao. 2010;30 (5): 1107-10. Nan Fang Yi Ke Da Xue Xue Bao (link) - Pubmed citation
- 3. Godge P, Sharma S, Yadav M. Adenoid cystic carcinoma of the parotid gland. Contemp Clin Dent. 2012;3 (2): 223-6. doi:10.4103/0976-237X.96838 - Free text at pubmed - Pubmed citation
- 4. Christe A, Waldherr C, Hallett R et-al. MR imaging of parotid tumors: typical lesion characteristics in MR imaging improve discrimination between benign and malignant disease. AJNR Am J Neuroradiol. 2011;32 (7): 1202-7. doi:10.3174/ajnr.A2520 - Pubmed citation
- 5. Godge P, Sharma S, Yadav M. Adenoid cystic carcinoma of the parotid gland. Contemp Clin Dent. 2012;3 (2): 223-6. doi:10.4103/0976-237X.96838 - Free text at pubmed - Pubmed citation