A 55-year-old male presents to the emergency department after being struck by a tree. A CT scan shows a transverse fracture of the temporal bone. What two structures are most at risk of injury with such a fracture?

Which segment of the facial nerve is LEAST likely to enhance when normal on 3T MRI?

What nerve is the most common connection between the facial nerve (CN VII) and trigeminal nerve (CN V) in perineural spread involving the face?

This 50-year-old man was involved in a road traffic collision, with blunt force trauma to the neck. There is evidence of supraglottic trauma on endoscopy. Which laryngeal structure is damaged on this CT?

This 50-year-old man experienced neck pain, with left pupillary abnormality and swallowing difficulty. An MRI is performed a few days later, with the T1W fat saturated sequence confirming the left internal carotid artery dissection. What is the hyperintensity on the T1FS sequence?

What is the structure indicated by the arrow on this axial temporal bone CT image?

A patient with untreated HIV (human immunodeficiency virus) infection in a developed country presents with altered mental status. Neuroimaging reveals multiple brain lesions associated with edema, contrast enhancement, and mass effect. What are the two most likely possibilities in the differential diagnosis?

A patient without prior medical history was involved in a motor vehicle collision and arrives obtunded. The patient undergoes noncontrast CT of the head and cervical spine. At the acquisition scanner, you identify scattered convexal subarachnoid hemorrhage and fractures of the right petrous temporal bone, characterized as otic-capsule sparing, coursing to the sigmoid plate, and not clearly involving the petrous carotid canal on that side. Based on this information, which of the following imaging tests is the most appropriate next step?

A CT report for facial trauma contains the following findings: "There is a mildly comminuted fracture involving the left frontal process of the maxilla and left nasal bone. Fracture lines in this region extend from the pyriform aperture across the medial maxillary buttress to the left inferior orbital rim, sparing the infraorbital canal. However, minimally displaced fractures involve the medial third of the orbital floor, internal orbital buttress, and the lamina papyracea. There is less than 0.5 mm outward herniation of extraconal fat into the ethmoid labyrinth. One of the fracture lines extends anteriorly to the frontomaxillary suture, liberating a minimally displaced fragment of bone containing the lacrimal fossa, which appears intact. The left lateral orbital wall is intact. There is a fracture of the medial wall of the maxillary sinus but not the lateral wall."

What classification best summarizes the most significant injuries?

Which is true regarding perineural tumor spread?

A 12-year-old boy presents with reduced visual acuity and during workup has an MRI. The right optic nerve is expanded all the way back to the chiasm which is also enlarged. Given the likely diagnosis, what is the most likely underlying condition?

What are the correct skull base foramina for the ophthalmic, maxillary and mandibular divisions of the trigeminal nerve, respectively?

What sensory branch of the trigeminal nerve provides secretomotor supply to the parotid gland and can be a conduit for the intracranial spread of parotid tumor?

Which of these clinical signs or symptoms is NOT associated with Eagle syndrome?

Which of these nerves does NOT supply pain sensation to the ear?

A 6-month old child is referred for an ultrasound because of an expanding lump on their lower back. It has been present for many months, but has started enlarging recently. There is slight skin discolouration. What is the most likely diagnosis?

Denervation changes on MRI in which muscle might be a clue to the presence of perineural tumor spread along the facial nerve from a parotid primary tumor?

Which connective tissues disease is commonly associated with nonspecific interstitial pneumonia (NSIP) pattern on imaging?

In which of these clinical settings would it be most appropriate to perform imaging of otitis externa?

Which technetium-99 labeled tracer is used for the detection of foci of splenic tissue?