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Biomedical subjects

Y Kajiya

Publications and source records attributed to Y Kajiya.

30 records · Page 2Linked to original sources
PubMedDate not supplied

Transarterial internal radiation therapy with I-131 Lipiodol for multifocal hepatocellular carcinoma: immediate and long-term results.

Transarterial internal radiation with I-131 Lipiodol (TAIR) was performed in 21 patients with multifocal hepatic carcinoma. Eight patients were treated by TAIR alone and 13 by combination of TAIR and intraarterial infusion of cis-diamminedichloroplatinum (CDDP) and/or adriamycin mitomycin C oil suspension (ADMOS). TAIR was found effective immediately and long-term. Serum alpha-feto-protein (AFP) levels dropped to 50% or less in 7 of 14 patients. Eleven of 21 patients (52%) showed 50% or greater decrease in tumor size. The overall 1-year survival rate was 43% and 67% in patients who received 50 Gy or greater tumor dose. Lipiodol distribution pattern of the tumor indicated some difference in the prognosis between the scattered pattern and solid pattern. The solid pattern showed a statistically significant better survival rate. Patients treated with TAIR alone versus those treated with TAIR and chemotherapy showed no difference in their survival rate.

Aged↗
PubMedDate not supplied

Retroperitoneal foregut cyst.

A foregut cyst is formed as a result of abnormal budding and pinching of the tracheobronchial tree when bronchial buds develop to form the primitive respiratory tree. Foregut cysts are clinically classified as bronchogenic, esophageal, enterogastric, or ciliated hepatic. We present a foregut cyst that occurred in the retroperitoneum and was difficult to distinguish from other retroperitoneal cystic mass lesions. Magnetic resonance imaging was useful in revealing the cyst's continuity to adjacent organs.

Aged↗
PubMedDate not supplied

HASTE MR cholangiopancreatography in the evaluation of intraductal papillary-mucinous tumors of the pancreas.

PURPOSE: The aim of this study was to determine the usefulness of MR cholangiopancreatography (MRCP) of intraductal papillary-mucinous tumors. METHOD: Thirteen patients with intraductal papillary-mucinous tumors were examined by breath-hold MRCP using a half-Fourier acquisition single-shot turbo spin echo (HASTE) sequence with a body phased-array coil. RESULTS: Endoscopic retrograde cholangiopancreatography (ERCP) and MRCP completely imaged the entire main pancreatic duct in 12 and in all 13 patients, respectively. ERCP demonstrated the whole opacification of the cystic lesion in only one patient. MRCP depicted the whole of the cystic lesion in all 11 patients who had cystic lesions. ERCP and MRCP source images depicted a communicating duct between the main pancreatic duct and the cystic lesion in 8 and in all 11 patients, respectively. ERCP depicted papillary projections in the main pancreatic ducts in two patients. MRCP source images depicted papillary projections in the main pancreatic ducts or cystic lesions in five patients. CONCLUSION: MRCP may be more useful to reveal the main pancreatic duct, cystic lesion, communicating duct between the main pancreatic duct and cystic lesion, and papillary projections than ERCP in patients with intraductal papillary-mucinous tumors of the pancreas.

Adenocarcinoma, Mucinous↗
PubMedDate not supplied

Treatment of hepatocellular carcinoma by transarterial injection of anticancer agents in iodized oil suspension or of radioactive iodized oil solution.

Transarterial injection of modified iodized oil was performed in 48 patients with hepatoma. In 41 cases an adriamycin and/or mitomycin C-iodized oil suspension was administered into the proper hepatic artery or peripheral hepatic branches. A reduction in tumor size of over 50 per cent was obtained in 14 of the 33 patients in whom CT examination was performed before and after treatment. Serum alpha-fetoprotein levels decreased in 20 of 21 cases within the first month after injection. The one-year survival rate was estimated at 55 per cent in advanced hepatoma. In 7 patients, transarterial internal irradiation using radioactive iodized oil was carried out. A decrease in tumor size was observed in all cases and in alpha-fetoprotein levels in 6 cases. One patient with severe liver cirrhosis died in hepatorenal failure. No severe complications or other adverse reactions were encountered with either of the methods.

Actuarial Analysis↗
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

A case of retroperitoneal pseudomyxoma.

We experienced a rare case of pseudomyxoma that progressed into the retroperitoneum. This patient presented with complaints of polyuria and back pain. CT and MRI showed a retroperitoneal cystic tumor. Surgical and pathological findings confirmed mucinous cystadenoma of the appendix that reached the posterior space behind the right kidney through the retroperitoneum.

Appendiceal Neoplasms↗
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↗