Small hepatocellular carcinoma with ring calcification: A case report and literature review

Figure 1 Findings of computed tomography. Upper left, plain abdominal computed tomography (CT) taken at the initial diagnosis revealed a 1-cm low-density lesion without calcification in liver segment 4 (white arrow). A small low-density area found in the left lateral section was a liver cyst (black arrow); upper right, plain abdominal CT taken 6 mo after the initial diagnosis revealed that the lesion had a ring calcification and an adjacent 1.8-cm lesion (white arrowhead); lower left and right, abdominal CT taken 6 mo after the initial diagnosis in the early phase (lower left) after a bolus administration of intravenous contrast material showed enhancement of the newly appeared lesion and the delayed phase (lower right) showed that it was hypoattenuated.