Article Figures & Data
Figures
- Fig 1.
Scatter plot of ADC values in benign and malignant head and neck lesions at 3T strength.
- Fig 2.
A, T2-weighted axial image in a 35-year-old male patient with pathologically proved sinonasal undifferentiated carcinoma reveals a mass lesion in the left ethmoidal region (black arrows) with resultant sphenoidal mucocele (white arrows). B, The mass demonstrates heterogeneous enhancement (black arrows) on the post-gadolinium axial T1 image with no enhancement within the mucocele (white arrows). C, The ADC in the lesion averaged 1.042 × 10−3 mm2/s.
- Fig 3.
Axial T2-weighted (A) and postcontrast T1-weighted (B) images in a 22-year-old female patient demonstrate a T2 hyperintense lesion with intense contrast enhancement within the right masseter (black arrows), which was a biopsy-proven hemangioma. C, The ADC within the lesion measured 1.842 × 10−3 mm2/s.
- Fig 4.
Axial T2-weighted (A) and postcontrast T1-weighted (B) images in a 40-year-old female patient demonstrate a destructive left skull base pathology with heterogenous hyperintensity and cystic areas on T2-weighted images (black arrows) and nonenhancing portions on the postcontrast images (black arrows). This was a biopsy-proven adenosquamous cell carcinoma with an increased ADC value averaging 1.649 × 10−3 mm2/s, probably due to the necrotic areas within the tumor.
- Fig 5.
Axial MR images in a 29-year-old woman reveal a left jugular foramen mass that is hypointense on T2-weighted (A) images and enhances with contrast (B). This was a biopsy-proven meningioma with a decreased ADC value of 0.669 × 10−3 mm2/s, which may be due to hypercellularity within the benign tumor.
Tables
Age, y/Sex Lesion ADC, × 10−3 mm2/s 89/F Lipomatous hemangiopericytoma 1.611 ± 0.167 45/F Fibrous dysplasia (F/U-15 y)* 0.949 ± 0.070 22/F Masseteric hemangioma 1.842 ± 0.075 57/F Orbital apex aspergillosis 1.576 ± 0.214 77/F Clival mass stable for 7 y* 1.915 ± 0.221 37/M Schwannoma (vestibular) 0.739 ± 0.079 34/F Schwannoma (vestibular) 1.566 ± 0.237 36/F Schwannoma (vestibular) 1.742 ± 0.181 58/M Schwannoma (vestibular) 1.922 ± 0.186 66/M Schwannoma (jugular foramen) 2.080 ± 0.332 39/F Schwannoma (mandibular nerve) 2.033 ± 0.521 33/M Oncocytoma (parotid) 2.150 ± 0.004 62/M Meningioma (cavernous sinus) (F/U of 2 y)* 1.041 ± 0.158 58/M Meningioma (cavernous sinus) (F/U of 3 y)* 1.512 ± 0.462 29/F Meningioma (jugular foramen) 0.669 ± 0.128 41/F Glomus jugulare 1.379 ± 0.144 31/F Sarcoidosis (right cerebellopontine angle mass) (F/U 3 y)* 0.863 ± 0.151 Note:—F/U indicates follow-up duration; ADC, apparent diffusion coefficient; F, female; M, male.
* No tissue confirmation was obtained.
Age, y/Sex Lesion Stage ADC, × 10−3 mm2/s 65/M Sinonasal undifferentiated SCC (P) T4N0M0 0.719 ± 0.157 35/M Sinonasal undifferentiated SCC (P) T4N0M0 1.042 ± 0.068 51/F SCC Parotid (P) T4N2M1 1.064 ± 0.162 61/M SCC palatine tonsil (P) T4N2BM0 0.847 ± 0.083 62/M SCC palatine tonsil (P) T4N3M1 0.733 + 0.055 62/M SCC palatine tonsil (MD) T3N1M0 1.261 ± 0.168 59/M SCC base of tongue (P) T2N3M0 0.955 ± 0.095 65/F SCC soft palate (P) T1N3M0 1.033 ± 0.183 78/F SCC nasopharynx (W) T4N0M0 1.319 ± 0.194 58/M SCC supraglottis (MD) T4N2BM0 1.278 + 0.070 83/M SCC supraglottis (MD) T4N0M0 1.138 ± 0.148 43/M SCC oropharynx (MD) T4N1M0 1.359 + 0.087 90/F SCC orbit (W) T4N1M1 1.055 ± 0.047 40/F Adenosquamous cell carcinoma skull base T4N0M0 1.649 ± 0.229 57/F Carcinoma ex pleomorphic adenoma (parotid) T2N1M0 1.241 ± 0.194 69/M Orbital B-cell lymphoma 3A 0.438 ± 0.099 Note:—SCC indicates squamous cell carcinoma; W, well-differentiated; MD, moderately differentiated; P, poorly differentiated; F, female; M, male; ADC, apparent diffusion coefficient.
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