Reversible CT findings of the liver after radiotherapy

We report the computed tomographic (CT) findings in a case of radiation therapy of the abdomen which affected the left lobe of the liver. The post-radiotherapy CT demonstrated a low density area involving the left lobe of the liver. One month later in a new CT this finding disappeared. We conclude that low density areas in the liver parenchyma following radiotherapy should be analysed with caution, especially when secondary deposits are considered in the differential diagnosis.