A 50-year-old male is investigated with MRI and found to have a solitary 6 cm enhancing carotid space mass. It displaces the internal carotid artery medially while the internal jugular vein remains lateral to the mass. It is well-defined with cystic areas. Which is the most likely diagnosis?  

What does a Stafne bone cyst (pictured here on CT) usually contain?

In the accompanying graphic, that depicts the changes in cerebral perfusion parameters with progressively decreasing perfusion pressure, which letter best identifies the infarct core? 

In the accompanying graphic, that depicts the changes in cerebral perfusion parameters with progressively decreasing perfusion pressure, which letter best identifies successful autoregulation? 

In the accompanying graphic, that depicts the changes in cerebral perfusion parameters with progressively decreasing perfusion pressure, which letter best identifies benign oligemia? 

A young man with sickle cell anemia presented to the emergency department with a 2-day history of severe headache and head swelling. His neurological examinations, including fundoscopy and CSF analysis, were within normal limits. An MRI brain was performed. What is the most likely diagnosis?

What vessel is indicated by the blue arrow?

A 40-year-old man with end-stage renal failure suffers acute features consistent with a pontine infarct. A CT demonstrates the following features. What is the most likely underlying condition?

Squamous cell carcinomas are the most common malignancy arising from the mucosal lining of the oral cavity. What types of tumors most often arise from the hard palate?

Which of the following is TRUE regarding H3 K27-altered diffuse midline gliomas?

A 15-year-old boy, presented with a history of a left hearing loss. A hard mass was noted within the EAC on the ENT exam. What is the most likely diagnosis shown on this selected CT image (bone window)?

Which component of the ostiomeatal complex is marked with the white circle on this image?

Which of the following describe features seen in sarcoidosis?

Which of the following structures is located in the middle cranial fossa?

Which of the following statements about Onodi cells (sphenoethmoidal air cells) is INCORRECT?

A 35-year-old male presents with unilateral hearing loss and otorrhea. Which of the following is the most likely diagnosis from this image?

At which level is the esophagus narrowest?

Which of these structures may be removed during a selective neck dissection?

What line is the default axial plane for MRI of the brain?

What structure is indicated by the blue arrow?