Axial contrast enhanced MRI: extensive JA with a typical pattern of spread into the cancellous bone of the basisphenoid along the vidian canal (white dotted line); on the contralateral side, black arrows indicate the right vidian nerve. Moreover, the lesion spreads deeply into the pterygomaxillary fossa toward the masticatory muscles, with anterior displacement of the posterior maxillary wall (white arrowheads). Asterisks indicate the foramen ovale bilaterally. TM: temporalis muscle; MM: masseter muscle.
