Abstract
The role of imaging in salivary gland neoplasms is to detect the tumor and possibly classify it as benign or malignant. In malignant tumor, imaging helps to stage the lesion according to the TNM classification, defining the size, the extension of the tumor, the involvement of the adjacent structures and detecting local or distant metastases. Imaging is also essential to guide biopsies, to plan therapy and to evaluate response to treatment. Imaging plays an important role during follow-up as it allows for early detection of recurrence; this role is crucial for those relapses that can be still treated, in the attempt to modify patients’ prognosis. For superficial tumors, especially within the parotid and the submandibular glands, ultrasound is the modality of choice for initial workup. If extra-glandular tumor extension is suspected, advanced techniques such as computed tomography or magnetic resonance imaging should be carried out. On the other side, for salivary gland tumors arising from the upper aerodigestive tract, endoscopy and CT examination are essentials. Positron emission tomography-computed tomography with fluorine-18-deoxy-d-glucose (FDG PET-CT) is not routinely recommended for the diagnosis and initial staging of salivary gland tumors, especially in histotypes with low glucose avidity. However, FDG PET-TC may be useful for detecting cervical lymph node and distant metastases.
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Abbreviations
- ACC:
-
Adenoid cystic carcinoma
- ADC:
-
Apparent diffusion coefficient
- CNB:
-
Core needle biopsy
- CT:
-
Computed tomography
- DCE-MRI:
-
Dynamic contrast-enhanced Magnetic Resonance Imaging
- DWI:
-
Diffusion-weighted imaging
- FDG PET-CT:
-
Positron emission tomography-computed tomography with fluorine-18-deoxy-d-glucose
- FNAC:
-
Fine needle aspiration cytology
- FS:
-
Fat saturation
- GE:
-
Gradient echo
- MET:
-
11C-methionine
- MRI:
-
Magnetic resonance imaging
- NOS:
-
Not otherwise specified
- SGTs:
-
Salivary gland tumor
- SUV:
-
Standardized uptake value
- T1W:
-
T1-weighted
- T2W:
-
T2-weighted
- T-peak:
-
Time-to-peak enhancement
- US:
-
Ultrasound
- WR:
-
Washout ratio
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Sdao, S., Civelli, E., Alessi, A., Calareso, G. (2019). The Role of Imaging in Staging and Follow-Up of Salivary Gland Tumors. In: Licitra, L., Locati, L. (eds) Salivary Gland Cancer. Springer, Cham. https://doi.org/10.1007/978-3-030-02958-6_3
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