Three-dimensional visualized technology-guided surgical resection for giant hepatic hemangioma with hemorrhagic necrosis: A case report and literature review.

Background: Hepatic hemangioma is the most common type of benign mesenchymal liver tumor and often has a good prognosis. However, giant hepatic hemangioma larger than 10 cm is an unusual event, and accompanying symptoms of internal hemorrhagic necrosis are extremely rare. There are only a few cases reported. Case summary: Herein, we report the case of a 52-year-old man with hemorrhagic necrosis of a giant hepatic hemangioma. The patient presented to the Department of Hepatobiliary Surgery with a complaint of distending pain on the right abdomen. The patient underwent hepatic artery embolization for giant hepatic hemangioma 2 weeks before presentation. During hospitalization, abdominal computed tomography revealed a mass (15.8 × 14.2 × 14.7 cm) with high density below the right lobe of the liver. The patient subsequently underwent irregular right hepatectomy with the guidance of three-dimensional visualization technology. The surgical anatomy confirmed the diagnosis of internal hemorrhagic necrosis. There was no recurrence or complications in a 4-month follow-up. Previous cases were reviewed to characterize the clinical features of giant hepatic hemangioma with internal hemorrhage necrosis. Conclusion: Cases of giant hepatic hemangioma with internal hemorrhagic necrosis are rare and usually only exhibit fever or epigastric pain. All patients in reviewed cases finally underwent surgical resection. Under these circumstances, the healing effect of transhepatic arterial treatment is not very satisfactory. Patients are deemed poor laparoscopic surgical candidates due to limited abdominal cavity. In order to standardize the diagnosis of these rare cares, the aggregation of existing and future case data is certainly warranted. If diagnosed, consideration should be given to implementing surgical resection according to patients' condition by three-dimensional visualized technology.

Handheld photoacoustic imaging of indocyanine green clearance for real-time quantitative evaluation of liver reserve function.

Preoperative assessment of liver function reserve (LFR) is essential for determining the extent of liver resection and predicting the prognosis of patients with liver disease. In this paper, we present a real-time, handheld photoacoustic imaging (PAI) system-based noninvasive approach for rapid LFR assessment. A linear-array ultrasound transducer was sealed in a housing filled with water; its front end was covered with a plastic wrap. This PAI system was first implemented on phantoms to confirm that the photoacoustic (PA) intensity of indocyanine green (ICG) in blood reflects the concentration of ICG in blood. In vivo studies on normal rabbits and rabbits with liver fibrosis were carried out by recording the dynamic PA signal of ICG in their jugular veins. By analyzing the PA intensity-time curve, a clear difference was identified in the pharmacokinetic behavior of ICG between the two groups. In normal rabbits, the mean ICG clearance rate obtained by PAI at 15 min after administration (PAI-R15) was below 21.6%, whereas in rabbits with liver fibrosis, PAI-R15 exceeded 62.0% because of poor liver metabolism. The effectiveness of the proposed method was further validated by the conventional ICG clearance test and pathological examination. Our findings suggest that PAI is a rapid, noninvasive, and convenient method for LFR assessment and has immense potential for assisting clinicians in diagnosing and managing patients with liver disease.