This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: GIT and hepatobiliary system, Subject name: Radiology
Hot nodule in a liver scan is due to 
Select and explain. 
A. Hepatic adenoma, B. Focal nodular hyperplasia, C. Metastasis, D. HCC
B: Focal nodular hyperplasia
Answer: B: Focal nodular hyperplasia 
Explanation: 50% of the focal nodular hyperplasia shows the presence of Kupfer cells (phagocytes). So uptake of sulfur colloid is noted in these lesions. No uptake is seen in HCC, hepatic adenoma, and metastases.