MCQ Flashcards
7 cards from real FRCR practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 MCQ flashcards as text
On a chest X-ray, which of the following is a typical feature of left lower lobe collapse?
Answer: Elevation of the left hemidiaphragm with a triangular opacity behind the heart
Left lower lobe collapse produces a triangular retrocardiac opacity and elevation of the left hemidiaphragm, with mediastinal shift to the left.
Which MRI sequence is most sensitive for detecting acute subarachnoid hemorrhage within the first 24 hours?
Answer: Gradient echo (T2*)
Gradient echo (T2*) sequences detect blood products by exploiting susceptibility effects, making them most sensitive for acute SAH, particularly small amounts.
A patient undergoes CT urography showing a filling defect in the right renal pelvis. Which diagnosis must be excluded first?
Answer: Urothelial carcinoma
Urothelial carcinoma of the renal pelvis is the most important diagnosis to exclude, as it requires prompt surgical management and carries significant morbidity.
Which of the following best describes the radiological appearance of pulmonary alveolar proteinosis on HRCT?
Answer: Crazy-paving pattern with ground-glass opacification and interlobular septal thickening
Pulmonary alveolar proteinosis classically shows the 'crazy-paving' pattern on HRCT, representing geographic ground-glass opacities overlaid by interlobular septal thickening.
On ultrasound, which feature is most useful in distinguishing a simple from a complex renal cyst?
Answer: Internal echoes, septations, or wall irregularity
Internal echoes, thick septations, nodularity, or irregular walls indicate complexity and warrant further evaluation with CT for possible malignancy (Bosniak classification).
A barium swallow shows a posterior indentation at the level of T4 causing dysphagia in an elderly man. What is the most likely diagnosis?
Answer: Aberrant right subclavian artery (dysphagia lusoria)
An aberrant right subclavian artery (arteria lusoria) passes posterior to the oesophagus, causing a characteristic posterior oblique filling defect at T4, known as dysphagia lusoria.
Which bone tumour most commonly undergoes malignant transformation in Paget's disease?
Answer: Osteosarcoma
Osteosarcoma is the most common malignant transformation in Paget's disease, occurring in approximately 1% of patients and carrying a very poor prognosis.