Frank Gaillard ◉ ◈

Which of the following histological features denotes a grade 4 astrocytic tumor - astrocytoma/glioblastoma? 

What WHO grade are pilocytic astrocytomas?

What mechanism of injury typically results in a Chance fracture?

In the current WHO classification of CNS tumors (2021), hemangiopericytomas are considered as part of spectrum with which other tumor?

Solitary fibrous tumors of the dura are considered to encompass which of the following entities?

This 3-month old boy presents with increasing head circumference. He underwent a cranial ultrasound. What is the most likely diagnosis? 

Which of the following CNS tumors has the best prognosis left untreated?

What type of Le Fort fracture is demonstrated in these coronal images of the same patient?

A 9-year-old boy presents with nystagmus and ataxia. He is investigated with a brain MRI. What is the most likely diagnosis?

In transverse fractures of the petrous temporal bone, which cranial nerve is most likely injured?

Which of the following is NOT one of the 4 regions considered when assessing MRI scans for the dissemination in space component of McDonald criteria for multiple sclerosis (2017 version)? 

In McDonald's criteria (2017) for the diagnosis of multiple sclerosis, what is the minimum number of lesions required to satisfy dissemination in space? 

Which of the following factors is a predictor of a relatively better outcome in ischemic stroke?

The appearance of the internal carotid arteries on the accompanying curved reformats from a CT angiogram in a 35-year-old woman are most likely due to... 

Which one of the following features is true regarding hepatocellular carcinoma?

A 35-year-old has a brain tumor biopsied. It has histological features compatible with an oligodendroglioma but is IDH-1 R132H negative on immunohistochemistry and neither next-generation sequencing nor 1p19q co-deletion status is able to be assessed due to lack of availability. What is the most appropriate diagnosis?