Looser zones, also called Umbauzonen or Milkman lines, are characteristically seen in which of the following conditions?

Which of the following features is NOT true about immunodeficiency-associated CNS lymphomas compared to sporadic primary CNS lymphoma? 

Which of the following causes inferior rib notching? 

What is the most likely diagnosis in this patient with a pleural malignancy? 

A 40-year-old man presents with a 3-month history of erythema nodosum. Based on the chest X-ray, what is the most likely diagnosis?

Which of the following entities is LEAST likely to present as a lobulated pachymeningeal mass?

Which imaging feature is most indicative of Langerhans cell histiocytosis (LCH) in the lungs?

Which of the following bones undergoes fatty marrow conversion first? 

Which tumor is the most common underlying cause of patients with autoimmune encephalitis?

As a general rule, patients with antibodies causing autoimmune encephalitis (limbic encephalitis) which target intracellular antigens are more likely to...

A 55-year-old woman, previously well, presents with 4-month history of rapid decline in cognitive function. She is imaged with an MRI.  What is the most likely diagnosis?

Which of the following would be in keeping with a “myeloma defining” focal lesion on WB-MRI?

Which of the following is NOT a cause of diffuse bone marrow hypercellularity?

A 9 year old boy from South Sudan presents with a large pelvic mass and multiple enlarged abdominal and pelvic lymph nodes. A lymph node is biopsied, with histopathology demonstrating a high-grade B-cell lymphoma in keeping with Burkitt lymphoma. Which one of these parasites is associated with development of this condition?