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Fig. 1.
Abdominopelvic CT. In the hepatovenous phase, a 3.2-cm sized hypovascular mass is seen in S5/6 of the liver.
Fig. 2.
MRI findings. A 3.2-cm sized mass in S5 of the liver shows heterogeneously increased signal on T2-weighted image (A) and delayed enhancement on 15 minute delayed phase (B). Multiple small hypovascular noncystic lesions are also found in the liver (C).
Fig. 3.
Pathologic findings of an initial biopsy specimen. (A) Sinusoidal dilatation and attenuated hepatic cords are seen (H&E stain, ×100).(B) Sinusoidal capillarization in the lesion is evident upon CD34 immunohistochemical staining (CD34 stain, ×40). (C) An inflammatory protein, CRP is positive (CRP stain, ×100). (D) -catenin shows an intact membranous expression (-catenin stain, ×100).
Fig. 4.
Follow-up MRI. The hepatic mass in S5/6 of the liver has enlarged from 3.1 to 4.1 cm (A, B), and the number and sizes of small hypovascular lesions in both hepatic lobes have increased (C).
Fig. 5.
Pathologic findings of a follow-up biopsy specimen. (A) Similar to that of the initial biopsy findings, sinusoidal dilatation and sinusoidal capillarization are noted (H&E stain, ×40). Sinusoidal capillarization (B; CD34 stain, ×40), CRP (C; CRP stain, ×100), amyloid (D; amyloid A stain,×200) are positive in the tumor cells.



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