Search PubMed⌕ Search

Biomedical subjects

O Matsui

Publications and source records attributed to O Matsui.

At least 145 records · Page 8Linked to original sources
PubMed1988

Fatty metamorphosis in hepatocellular carcinoma: radiologic features in 10 cases.

We describe the sonographic, CT and angiographic findings in 10 cases of hepatocellular carcinoma in which extensive fatty metamorphosis occurred within the tumors. Fatty change was diffuse in smaller tumors (less than 3.5 cm) and focal in larger tumors (greater than 3.5 cm). Fatty metamorphosis characteristically caused a low-attenuation area on CT (less than -10 H) and a highly echogenic area on sonography. The sonographic appearance of small hepatocellular carcinomas with fatty metamorphosis was identical to the findings in cavernous hemangioma or focal fatty change of the liver. CT correctly revealed the presence of fat in these hepatocellular carcinomas. In these cases, hepatic arteriography showed no tumor stain; however, CT arteriography (dynamic CT during injection of contrast medium into the hepatic artery) was useful in showing the tumor, its capsule, and its internal septa. In the diagnosis of large hepatocellular carcinoma, the presence of intratumoral fat is not likely to be problematic, but small tumors that are diffusely infiltrated by fat must be distinguished from such benign conditions as focal fatty change, lipoma, and angiomyolipoma.

Aged↗
PubMed1987

Staining in the liver surrounding gallbladder fossa on hepatic arteriography caused by increased cystic venous drainage.

In 8 patients with gallbladder disease in whom no extension of the disease to the liver was confirmed by surgery, wedge-shaped (segmental) staining of the liver just adjacent to the gallbladder fossa (gallbladder bed) on hepatic arteriography was seen. This was always accompanied by definite visualization of the cystic veins with the drainage directed to the gallbladder bed and became most dense following the peak of the opacification of the cystic veins. We therefore concluded that the increased cystic venous drainage to the intrahepatic portal vein causes the staining in the nondiseased gallbladder bed on hepatic arteriography.

Angiography↗
PubMed1987

Liver metastases from colorectal cancers: detection with CT during arterial portography.

A total of 45 metastases to the liver from colorectal cancer were resected in 22 patients. The detectability of these lesions with the following modalities was determined: real-time ultrasound (US), computed tomography (CT), selective celiac arteriography (SCA), infusion hepatic angiography (IHA), CT during arterial portography (CTAP), and CT following intraarterial injection of iodized poppyseed oil (Lipiodol). The total detection rate (sensitivity) was 58% for US, 63% for CT, 27% for SCA, 50% for IHA, 84% for CTAP, and 38% for CT with iodized oil. Ten of 18 lesions less than 15 mm in largest diameter were demonstrated preoperatively by CTAP only. CTAP is useful in clarifying the locations of the lesions in the liver and should always be performed before liver metastases from colorectal cancer are resected.

Celiac Artery↗
PubMed1987

Focal fatty change of the liver adjacent to the falciform ligament: CT and sonographic findings in five surgically confirmed cases.

Five cases of surgically confirmed focal fatty infiltration of the liver were detected by CT and sonography. In all five cases, the abnormality was located at the anterolateral edge of the medial segment of the liver. It was seen as a small area of low attenuation adjacent to the falciform ligament on CT and as an echogenic area next to the ligamentum teres on sonography. Dynamic CT performed during infusion of contrast medium via the superior mesenteric artery (arterial portography) showed portal blood flow within the lesion and was useful for excluding the presence of a hepatic tumor. Focal fatty infiltration of the liver adjacent to the falciform ligament constitutes a diagnostic pitfall on CT and sonography.

Fatty Liver↗
PubMed1986

Angiographic findings in two carcinoid tumors of the gallbladder.

Angiography was performed in 2 patients with carcinoid tumors of the gallbladder. In the first case, proper hepatic angiography revealed an obstruction and irregular neovascularization of the cystic artery and an encasement of the right hepatic artery. In the second case, celiac angiography revealed a dilatation and fine neovascularization of the cystic artery. In both cases, moderate hypervascular metastatic lesions were demonstrated in the liver. Although hypervascular metastases might suggest the diagnosis of metastasis from carcinoid tumor, the specific diagnosis of carcinoid tumor of the gallbladder must rely on the pathologic evidence.

Carcinoid Tumor↗
PubMed1986

Marked hypervascularity and early arteriovenous shunting with portal vein filling in chronic relapsing pancreatitis.

Angiography was performed in 2 patients with chronic relapsing pancreatitis. Marked hypervascularity and early arteriovenous shunting with portal vein filling were demonstrated. Increased capillary vessels in the thickened capsule due to inflammation were observed in the pathologic specimen. The angiographic findings we report here are quite similar to those of pancreatic arteriovenous malformation.

Angiography↗
PubMed1986

Hepatic artery embolization of experimental hepatic tumors with absolute ethanol.

Hepatic artery embolization with absolute ethanol (HAEE) was done in rats and rabbits with experimentally induced liver tumors, and its effects on liver parenchyma and tumors were analyzed microscopically in comparison with those of controls. HAEE with 0.1 ml in rats brought massive tumor necrosis and minimal damage to liver parenchyma. But HAEE with 0.15 ml in rabbits induced moderate to massive necrosis of liver parenchyma with minimal to moderate tumor necrosis. Damage to the intrahepatic bile ductules was also seen in both animals. Many problems should be resolved before clinical use.

Animals↗
PubMed1986

Therapeutic hepatic vein angioplasty for Budd-Chiari syndrome.

The authors report a case of Budd-Chiari syndrome treated by percutaneous transluminal angioplasty (PTA). In this case, the occlusion of three major hepatic veins with a big collateral to the inferior vena cava via the right inferior hepatic vein (RIHV) and stenosis of the ostium of RIHV were seen. We performed successful PTA of this stenosis.

Angioplasty, Balloon↗
PubMed1985

Unusual portosystemic collateral penetrating the liver parenchyma.

We present a case of an extremely rare portosystemic collateral pathway which arose from the right intrahepatic portal vein, passed through the liver parenchyma, and terminated into the inferior vena cava. We demonstrate the findings of diagnostic imaging and discuss the etiology of the collateral circulation in this unusual case.

Aged↗