長沼 晶子, 石田 秀明, 森川 パブロ, 石岡 知憲, 新澤 真理, 石田 真一, 大山 幸子, 長沼 裕子, 正宗 研

Syoko NAGANUMA, Hideaki ISHIDA, Pablo MORIKAWA, Tomonori ISHIOKA, Makoto NIIZAWA, Shinichi ISHIDA, Yukiko OHYAMA, Hiroko NAGANUMA, Osamu MASAMUNE

秋田大学医学部第一内科

The First Department of Internal Medicine, Akita University School of Medicine

キーワード : FNH, Doppler, Ultrasound

We reported a case of a 33–year–old woman with focal nodular hyperplasia of the liver (FNH). Ultrasonography revealed a well–circumscribed isoechoic mass which contained multiple, small nodules and many linear high–echoes in the caudate lobe. Color Doppler sonography showed the following findings: 1) numerous color spots in the mass, suggestive of the hypervascular nature of the lesion; 2) arterial branches penetrating from the margin to the center of the mass; and 3) comparatively slow blood velocity in the arterial branches (Vmax=20 cm⁄s, Vmin=7 cm⁄s, Vmean=13.5 cm⁄s, P. I. =0.96). Precontrast CT scan showed a low–density mass with lower–density components. A dynamic CT scan obtained 8 sec after a bolus injection of the contrast material showed feeding arteries running from the periphery to the center of the mass. These findings corresponded closely to the characteristic histological findings of FNH.