Accessory salivary tissue has a variable appearance and location in the oral cavity. Accessory salivary tissue has a variable appearance and location in.

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Presentation transcript:

Accessory salivary tissue has a variable appearance and location in the oral cavity. Accessory salivary tissue has a variable appearance and location in the oral cavity. General features include tissue that is associated with mylohyoid defects and is of similar attenuation and appearance as orthotopic salivary tissue. A–D, CT and MR correlation in the same patient with anterior accessory salivary tissue. A, Postcontrast axial CT scan. B, Axial fast spin-echo fat-saturated T2-weighted image. C and D, Postcontrast coronal T1-weighted image. Image C is posterior to image D. The postcontrast CT scan shows enhancing tissue that extends into the submandibular space through deficiencies in the anterior mylohyoid muscle bilaterally (small black arrows). The deficient mylohyoid muscle is clearly identified on the fat-saturated T2-weighted sequence (small white arrows). The normal hyperintense sublingual salivary tissue is clearly identified, extending into the submandibular space anteriorly (large white arrows). The coronal sequences are very useful for identifying the mylohyoid muscle. C depicts the intact mylohyoid muscle (large black arrows) separating the sublingual space and sublingual salivary tissue (*) from the submandibular space. D is located more anteriorly at the level of the mylohyoid defects. Notice the absence of the mylohyoid muscle at this level allows extension of the sublingual salivary tissue into the submandibular space (small black arrows).E, Postcontrast CT shows a large deposit of salivary tissue that is located predominately in the submandibular space, with a tapering configuration toward a mid-mylohyoid defect (single arrow). The attenuation and appearance is very similar to the normal submandibular glands (*).fig. 3 (Continued)F, Postcontrast CT shows accessory salivary tissue, which spans a defect in the mid aspect of the mylohyoid muscle. The tissue is well defined, elongated in configuration, and located in both the sublingual and submandibular space. The attenuation and appearance is very similar to that of the normal submandibular gland (*) (18). David K. White et al. AJNR Am J Neuroradiol 2001;22:406-412 ©2001 by American Society of Neuroradiology