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Journal of the Egyptian National Cancer Institute
Fig. 2 | Journal of the Egyptian National Cancer Institute

Fig. 2

From: High-grade transformation of adenoid cystic carcinoma of parotid gland with isolated intratemporal facial nerve involvement: a case report and literature review

Fig. 2

HRCT and CE-MRI findings of adenoid cystic tumor of right parotid (arrow) in a 26-year-old female patient showing perineural extension along the facial nerve. A HRCT scan in axial section showing the enlarged canal for mastoid segment of facial nerve (msfn). B HRCT in oblique sagittal section showing enlarged posterior genu of facial nerve (pgfn) with 3 mm extension into tympanic segments (tsfn) of facial nerve. C HRCT in oblique coronal section showing enlarged posterior genu (pgfn) and mastoid segments (msfn). D (a, b, c, d). (a) Showing the parotid lesion as isointense on T1WI, (b) enhancing on post contrast T1WI, (c) hyperintense on DWI, and (d) hypointense on ADC maps indicating restriction of diffusion. E Axial contrast enhanced MRI showing enhancement of mastoid segment of facial nerve (msfn). F Axial contrast enhanced MRI showing patchy enhancement with thickening of the posterior genu of facial nerve(pgfn)

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