Which of the following locations most commonly demonstrate early erosive changes in rheumatoid arthritis?

On frontal CXR, splaying of the carina and a 'double density sign' indicate enlargement of which cardiac chamber?

This 35-year-old woman presented with abdominal pain and a prior history of seizures. Ultrasound examination showed large heterogeneous lesions in both kidneys. CT is performed. Abdominal MRI performed 2 days later is also provided. What is the most likely diagnosis?

What is the most likely cause of breathlessness in this elderly patient?

A 47 year old lady has a CT of her chest. The right ventricle is dilated when compared to the left. The pulmonary arteries are normal. Which is the most likely cause?

A 75 year old lady has a CT after a history of breathlessness. There is a mass within the right atrium related to the free wall. The epicardial fat plane is lost and there is a pericardial effusion. Which is most likely?

Which of the following images shows a correctly positioned nasogastric tube?

Which one is not the COVID-19 pneumonia?

A 70-year-old female presents with hand pain. A PA hand and wrist x-ray is shown. What is the most likely diagnosis?

In fibromuscular dysplasia, which vessels are most commonly affected? 

A Gerbode defect is a communication between the...

Which of the following is the most common primary cardiac tumor in adults?

What is the most likely cause of this acute cerebral infarct?

All the following points may be the etiologies of bilateral and symmetrical sacroiliitis EXCEPT...

How would you classify this type of aortic dissection?

What type of inflammatory enteritis often involves multiple vascular territories and the genitourinary system?

Regarding takotsubo cardiomyopathy, which of these is true?

A 12-year-old boy with a history of intellectual disability comes to the emergency department because of headaches and more frequently occurring seizures. Brain imaging (CT scan and MRI) shows a heterogeneous intraventricular mass measuring about 18 mm near the foramen of Monro,  with internal calcifications and marked contrast enhancement. Subependymal nodules and cortical tubers are the other imaging findings. Which of the following is the most likely diagnosis?

A 7-year-old boy with a history of intellectual disability and seizures comes to the emergency department because of headaches and more frequently occurring seizures. CT scan of the brain shows subependymal nodules with calcification, cortical foci with loss of the grey-white matter distinction, and a nodule partially obstructing the foramen Monro. Which of the following is the most likely diagnosis?

In cardiac PET-CT, when using F-18 FDG to investigate cardiac sarcoid, a cardiac fasting protocol is used to switch myocardial metabolism from glucose to fatty acids. How long should the patient fast for?