Multidisciplinary approach for multifocal, bilobar hepatocellular carcinoma: A case report and literature review

Figure 2 Radiation therapy approach. A, B: Proton radiation therapy treatment using a 2-beam approach for the treatment of the right-sided hepatocellular carcinoma highlighting low dose to the contralateral lobe of the liver; C, D: Demonstrated functional liver imaging using technetium-99m sulfur colloid single-photon emission computerized tomography scan co-registered to the radiation therapy planning computed tomography to aid in target delineation of the gross tumor volume and sparing of the highly functional liver (max sulfur colloid single-photon emission counts shown in red). Key: Liver minus gross tumor volume is demonstrated by the teal line (panels A, B), internal target volume (gross tumor volume + tumor motion on 4D-computed tomography scan) is shaded in red (panels A, B).