PMC2822318_01
Abdominal CT shows a lobulated, heterogenous contrast enhancing, soft tissue mass involving the entire left hepatic lobe (10x7 cm). Note the focal nodular enhancement around the peripheral portion of the hepatic mass in arterial phase.
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F1
The tumor showed focal nodular enhancement around the peripheral portion of the hepatic mass during the arterial phase, and an increased extent of peripheral nodular contrast-enhancement with a persistent low density noncontrast-enhancing portion in the center of the tumor during the delayed phase (Fig. 1, 2).
Abdominal CT shows an increased extent of peripheral nodular contrast-enhancement with a persistent low density noncontrast-enhancing portion of the tumor centrally in delayed phase.
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F2
The tumor showed focal nodular enhancement around the peripheral portion of the hepatic mass during the arterial phase, and an increased extent of peripheral nodular contrast-enhancement with a persistent low density noncontrast-enhancing portion in the center of the tumor during the delayed phase (Fig. 1, 2).
Angiography shows some tumor-supplying arteries from the left hepatic artery. There is no evidence of gross invasion in the main arteries.
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F3
The angiography illustrated some tumor supplying arteries from the left hepatic artery, with no evidence of gross invasion to the main arteries (Fig. 3).
MRCP shows no dilatation of intra- and extra-hepatic bile duct. The left intrahepatic duct is not visualized due to tumor replacement.
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F4
The left intrahepatic duct was not visualized, probably due to tumor replacement (Fig. 4).
The specimen shows an inhomogeneous, multinodular mass with a focal necrosis.
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F5
No major vessel invasion was observed (Fig. 5).
H-E stained microscopic specimen (x40). The thrombotic material is fragmented and entrapped by the ingrowing endothelial cells. There is no soft tissue invasion, atypia, or significant necrosis.
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F6
There was no soft tissue invasion, atypia, or significant necrosis, which collectively supported the diagnosis of intravascular papillary endothelial hyperplasia (Masson's hemangioma) of the liver (Fig. 6).