This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'A 22 year old man presents with a solitary 2 cm space occupying lesion of mixed echogenicity in the right lobe of the liver on ultrasound examination. The rest of the liver is normal. Which of the following tests should be done next – \nSelect and explain. \nA. Ultrasound guided biopsy of the lesion, B. Hepatic scintigraphy, C. Hepatic angiography, D. Contrast enhanced CT scan of the liver', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lesion in right hepatic lobe with mixed echogenicity on USG suggests the diagnosis of hemangioma.\nMRI is the most accurate method of diagnosing liver hemangioma and is indicated when liver hemangioma is suspected on USG and the diameter of the lesion is smaller than 2.5 cm. However, MRI is not provided in the options.\nA second most accurate method of diagnosing liver hemangioma is SPECT RBC scintigraphy (hepatic scintigraphy). It is indicated to confirm the diagnosis when hemangioma is suspected on USG and the diameter of the lesion is greater than 2.5 cm.\n\nSuspected hemangioma on USG:-\nLesion smaller than 2.5 cm in diameter\xa0\xa0\xa0→\xa0MRI\nLesion greater than 2.5 cm in diameter\xa0\xa0\xa0\xa0→\xa0hepatic scintigraphy', 'role': 'assistant'}]