Biomedical subjects

N Miyazono

Publications and source records attributed to N Miyazono.

42 records · Page 3Linked to original sources

PubMedDate not supplied

A case of sclerosing hemangioma of the lung: correlation of MR images with pathological findings.

The authors present a case of sclerosing hemangioma of the lung in which MRI was performed. The tumor had areas of various signal intensities on both T1- and T2-weighted images, including high-intensity areas and isointensity areas relative to muscle. We compared the signal intensity of the tumor with its pathological findings. The relatively high signal intensity of the tumor on T1-weighted images was thought to be a reflection of lipids of clear cells, and the isointensity relative to muscle on T1-weighted images to be a reflection of fibrosis. Hyperintensity was also seen on both T1- and T2-weighted images, and was intralesional hemorrhage. Use of Gd-DTPA strongly enhanced the tumor. This enhancement was thought to be abundant blood cavities, since not many capillaries were seen in the specimen. The signal intensity of the tumor corresponded closely to the pathognomonic findings, and it is thought that MRI may be helpful in diagnosing sclerosing hemangioma of the lung because of its high contrast resolution.

Contrast Media↗

PubMedDate not supplied

Estimation of the kinetics of iodized oil injected into the feeding artery of hepatocellular carcinoma using dynamic computed tomography.

The distribution of iodized oil (Lipiodol) after its injection in hepatocellular carcinoma (HCC) was evaluated by dynamic computed tomography (CT) in 10 patients. Following the injection of Lipiodol into the hepatic artery, two patterns were observed. In type I (4/10 tumors) Lipiodol retention began at the tumor periphery and then spread contiguously towards the central portion. In type II (6/10 tumors), the accumulation began at the periphery, but then skipped directly to the central portion of the tumor. Hypervascular tumors were predominantly type I, and avascular or hypovascular tumors were all type II. This difference in Lipiodol kinetics suggests that lipid-based intra-arterial (i.a.) chemoembolization should precede the i.a. infusion of water-soluble chemotherapeutic agents or injection of solid embolic materials in hypervascular tumors.

Aged↗

PubMedDate not supplied

A case with Cushing's syndrome treated with arterial ablation of adrenal gland by absolute ethanol.

Adrenal arterial embolization with absolute ethanol was performed for the treatment of Cushing's syndrome. A 55-year-old woman was admitted to our hospital with complaints of obesity, hypertension, and back pain caused by left adrenal hyperplasia after surgical resection of the right adrenal gland. Therapeutic adrenal arterial embolization was performed by the coaxial technique using absolute ethanol (AE) as an embolic material. No severe complications were encountered during the procedure, and the patient was discharged without symptoms or abnormalities on laboratory tests.

Adrenal Glands↗

PubMedDate not supplied

Successful therapeutic embolization of aldosteronoma using absolute ethanol.

Adrenal arterial infusion of absolute ethanol (AE) was successfully performed to treat a hyperfunctioning aldosteronoma. One milliliter of AE was infused into the branches of the inferior adrenal artery using a microcatheter with coaxial technique. No severe complications occurred during the procedure. The patient has experienced no recurrence of symptoms, and laboratory values have remained normal for eight months after therapy.

Adrenal Glands↗

PubMedDate not supplied

Primary hepatic neuroendocrine carcinoma with multiple metastases: a case report.

We report a rare case of primary hepatic neuroendocrine cell carcinoma with multiple metastases to the liver, lung, diaphragm, bone, and pancreas. The patient was a 45-year-old man with jaundice and a large hepatic tumor measuring 12 x 16 cm at autopsy. Located in the right lobe, it was hyperechoic and inhomogeneous on US, a diffusely low density mass that contained capsule- and septum-like structures enhanced by contrast medium on CT, an inhomogeneously low intensity mass with much lower intensity foci on T1-weighted MRI, and a diffusely high intensity mass containing small higher and lower intensity foci on T2-weighted MRI. These findings are similar to those of a few previously reported cases, but are not specific to this tumor.

Carcinoma, Neuroendocrine↗

PubMedDate not supplied

MR imaging during arterial-portography (MR-AP) in the detection of hepatic tumor: comparison with CT-AP.

This study was undertaken to compare the detection rate of hepatic space occupying lesion (SOL)s between computed tomography during arterial portography (CT-AP) and magnetic resonance imaging during arterial portography (MR-AP) and the differences in time intensity curve on MR-AP between HCC, metastatic tumor, FNH, and hemangioma. We performed CT-AP and MR-AP in 17 patients including 14 cases of HCC and one each of metastasis, FNH, and hemangioma. MR-AP was performed by Turbo-FLASH sequence. There was no statistically significant difference between CT-AP and MR-AP in detecting satellite lesions in terms of smallest diameter and number of flow defects (p > 0.05). Hemangioma showed rapid enhancement after the first pass and, consequently, the same enhancement as the hepatic parenchyma. MR-AP was comparable to CT-AP in the detection of hepatic SOLs. Hemangioma showed an enhancement pattern different from those of HCC, metastatic tumor, and FNH, which showed patterns similar to each other.

Carcinoma, Hepatocellular↗