Question 482
According to the 2021 WHO classification of CNS tumors (5th edition), gliomatosis cerebri is considered a...
Question 501
A 50-year-old woman presents with a gradual decline in cognitive function and is investigated with an MRI. Which of the following most likely describes their cognitive deficit?
Question 502
A 35-year-old woman, previously well, developed persistent headaches and was imaged with a contrast-enhanced MRI. What is the most likely diagnosis?
Question 503
A 55-year-old male involved in a motor vehicle accident many years ago was investigated with MRI. What symptom, related to the imaging finding shown, is he most likely to report?
Question 507
A 60-year-old man, previously well, presents with three peripherally enhancing, centrally non-enhancing, cerebral lesions. Two are in the white matter of the frontal lobe, and another is in the anterior body of the corpus callosum. Which of the following is the most likely diagnosis?
Question 508
A 65-year-old female with a proven glioblastoma (IDH-1 wild-type, MGMT methylated) undergoes Stupp protocol combined chemoradiotherapy. Two months after completion of radiotherapy, a follow-up MRI demonstrate a substantial increase in size of a peripheral enhancing component with abundant surrounding vasogenic edema resulting in mass effect. The enhancing component has low cerebral blood volume and spectroscopy demonstrates a dominant lipid and lactate peak, with minimal choline or NAA.
What is the most likely diagnosis?
Question 509
Solitary fibrous tumors of the dura are considered to encompass which of the following entities?
Question 510
Ependymoma ZFTA fusion-positive tumors are primarily seen in which of the following scenarios?
Question 511
Which of the following immunohistochemical molecular markers is usually NOT positive in ependymomas?
Question 512
Tanycytic ependymomas are usually found in which location?
Question 513
The histological feature shown in the attached image is consistent with which of the following central nervous system tumors?
Question 514
Myxopapillary ependymomas most frequently occur in which location?
Question 515
Overall, what is the most common location for an ependymoma?
Question 516
Which of the following is the earliest visible CT finding of likely ischemic stroke?
Question 517
A 55-year-old man with headaches is investigated with an MRI. What does the non-enhancing lesions shown on the accompanying T2 image most likely represent?
Question 518
Subependymomas are most common found in which location?
Question 523
This 3-month old boy presents with increasing head circumference. He underwent a cranial ultrasound. What is the most likely diagnosis?
Question 524
A 4 month-old girl presents with a large mass within the trigone of the lateral ventricle, with associated hydrocephalus. Which of the following is the most likely diagnosis?
Question 525
A 3-year-old girl presents with a headache. She undergoes a contrast enhanced MRI. What is the most likely diagnosis?
Question 526
A 66-year-old woman presents with nausea, headache and vomiting. She undergoes a contrast-enhanced MRI. What is the most likely diagnosis?