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Radical maxillectomy for adenoid cystic carcinoma. A mass lesion (arrow) is seen in the lowermost part of the pterygopalatine fossa (a,b) exhibiting b-1000 hyperintensity (c) and diffusion restriction (ADC 0.98 × 10−3 mm2/s) (d). Denervation atrophy of masticator muscles (arrowheads) is due to perineural spread reaching the Meckel cave and, antegradely, the mandibular nerve (not displayed in these images).
