Fig. 1

The imaging findings of PHA patients 1, 2 and 3. Patient 1. An irregular space occupying lesion with a size of 5.7 × 4.3 × 4.3 cm could be seen in the right liver. A-1. On T2WI, there was a high signal, septum and mixed signal shadow; A-2. On T1WI, most of them were hypointense, and a high signal nodular shadow was seen on the edge; A-3. On the contrast-enhanced scan, there was a little nodular enhancement; A-4. In portal phase, the enhancement of marginal nodule disappeared, and the septal stroma gradually strengthened. Patient 2. A tumor about 6.7 × 8.8 × 8.0 cm in size was found in the right liver. B-1. On T2WI, there was mixed high and low signal intensity; B-2. On T1WI, most of the tumors were hypointense and a few were patchy hyperintense; B-3. Irregular strip and progressive enhancement were found in the tumor. B-4. MR diffusion weighted imaging showed that most of the tumors showed mixed restricted diffusion. Patient 3. A tumor about 15 × 14 × 13 cm in size in the whole right liver, part of which was located in the left liver. C-1. On T2WI, most of the tumors showed high signal intensity, a few of them were extremely high signal, and a small amount of low signal. C-2. On T1WI, the tumor showed hypointensity. C-3. On a contrast-enhanced scan, the tumor showed irregular strip reinforcement. C-4. One month after TACE, a CT scan of the liver showed that there was a lot of lipiodol accumulation and deposition in hepatic angiosarcoma