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Tamotsu Kamishima

Publications and source records attributed to Tamotsu Kamishima.

7 recordsLinked to original sources
PubMed2005

Detection of amiodarone-induced pulmonary toxicity in supine and prone positions: high-resolution computed tomography study.

BACKGROUND: The aim of the present study was to describe the effectiveness and feasibility of high-resolution computed tomography (HRCT) in patients in supine and prone positions to detect amiodarone-induced pulmonary toxicity (APT). With regard to the possible differential diagnosis, our second goal was to emphasize the clinical value of HRCT with the patients in supine and prone positions compared with other paraclinical tests. METHODS AND RESULTS: Thoracic HRCT taken in both positions for 23 patients who were administrated amiodarone were prospectively evaluated in the current study. High-resolution computed tomography scans obtained with the patient in a prone position were helpful in differentiating dependent opacity from lung disease in 11 out of 23 patients. In another 4 patients, HRCT scans obtained with the patient in a prone position were useful in confirming the presence of subtle ground-glass opacities, considered as APT. Combination of HRCT in supine and prone positions provided a more reproducible method for evaluating the global extent of APT than other paraclinical tests. CONCLUSIONS: High-resolution computed tomography used in prone positions as well as a supine position could be an effective technique for reducing false-positive results in detection of APT and preventing the clinically serious pulmonary adverse effects by amiodanone.

Adult↗
PubMed2005

Chemical shift MR images of the parotid gland in Sjögren's syndrome utilizing low-field MR system comparison with MR sialography and salivary secretion function.

PURPOSE: To compare chemical shift imaging and MR sialography in patients with Sjögren's syndrome utilizing a low (0.3 Tesla) magnetic field. METHODS: We retrospectively evaluated 8 controls (16 glands) and 30 patients (60 glands) with parotitis of Sjögren's syndrome. MR images were obtained with a 0.3 Tesla system (HITACHI MRP-7000, Hitachi, Ltd., Tokyo, Japan) with a coil for the temporomandibular joint. MR sialography was graded according to the grading system established for conventional sialography. The signal decrease rate between in- and opposed-phase images, and the standard deviation (S.D.) of the parotid parenchymal signal in opposed-phase images were measured. RESULTS: MR sialography and chemical shift images were obtained in 38 and 46 glands, respectively. MR sialography was graded as 0 in 15, 1 in 12, 2 in 4, and 3 in 5 glands. The mean signal decrease rate in in/opposed phase was 37.6%, and the mean S.D. of the parotid parenchymal signal in the opposed-phase images was 655.9. The salivary secretion function was related to heterogeneity on opposed phase (r=-0.3) but not to MR sialography grading. CONCLUSION: Heterogeneity on opposed-phase images assessable with a low-field magnet system may be a useful parameter to add in the evaluation of Sjögren's parotitis.

Adult↗
PubMed2003

Acute posterior interosseous nerve palsy caused by septic arthritis of the elbow: a case report.

A rare case of acute posterior interosseous nerve palsy caused by septic elbow arthritis is reported. The nerve was compressed beneath the arcade of Frohse by hypertrophied synovium and joint fluid at the anterior aspect of the radial neck. Decompression of the nerve, synovectomy, and irrigation of the elbow joint were done. effective. Six months after the surgery the nerve palsy had recovered completely. Two years after surgery there was no recurrence of the infection or nerve palsy.

Adult↗
PubMed2002

Spontaneous rupture of hepatocellular carcinoma supplied by the right renal capsular artery treated by transcatheter arterial embolization.

We present a case of spontaneous rupture of hepatocellular carcinoma (HCC) with poor liver function which was treated by transcatheter arterial embolization (TAE). The patient's bilirubin value was 3.8 mg/dL. The tumor was fed by the right renal capsular artery according to selective arteriography. It was subsequently treated by TAE. With successful TAE, no hepatic failure was related to the treatment. We believe that if tumors are fed only by extrahepatic collateral vessels, TAE may be an effective treatment even in patients with poor liver function.

Aged↗
PubMed2002

Cirrhosis: modified caudate-right lobe ratio.

PURPOSE: To determine whether a modified caudate-right lobe ratio (C/RL) with use of the right portal vein to set the lateral boundary (C/RL-r) is more accurate for diagnosing cirrhosis and evaluating its clinical severity than is the previously described C/RL with use of the main portal vein to set the lateral boundary (C/RL-m). MATERIALS AND METHODS: Two hundred thirty-six patients (121 with pathologically proved cirrhosis and 115 without history of chronic hepatic diseases) underwent magnetic resonance (MR) imaging. Two independent observers measured C/RL-r and compared it with C/RL-m. Results were compared by using receiver operating characteristic (ROC) curves and accuracy measures at various thresholds. RESULTS: The area below the ROC curve was greater for C/RL-r (0.797) than for C/RL-m (0.731; P =.040). By using a C/RL-r greater than 0.90, the sensitivity, specificity, and accuracy for the MR imaging diagnosis of cirrhosis were 71.7%, 77.4%, and 74.2%, respectively. The highest accuracy of the C/RL-m was 65.7%, when the C/RL-m was greater than 0.55. Interobserver agreement was statistically confirmed for both measurements by using kappa analysis. Significant differences were found among the three Child-Pugh classes by using C/RL-r (P =.0105) but not by using C/RL-m. CONCLUSION: C/RL-r is more accurate for diagnosing cirrhosis and evaluating its clinical severity than is C/RL-m.

Adult↗
PubMed2002

Small (<20 mm) enhancing hepatic nodules seen on arterial phase MR imaging of the cirrhotic liver: clinical implications.

OBJECTIVE: To determine the significance in patients with cirrhosis of small (<20 mm) hepatic nodules that show no hyperintensity on T2-weighted MR images but that enhance during arterial phase MR imaging, we reviewed the cases of patients with such nodules. MATERIALS AND METHODS: Our review of radiology reports yielded 68 nodules in 40 patients with cirrhosis that showed no hyperintensity on T2-weighted MR images but had rapid enhancement during arterial phase MR imaging after administration of a gadolinium contrast agent. Thirty-four patients (60 nodules) had multiple follow-up MR imaging examinations (range of length of follow-up, 1-72 months; average length of follow-up, 15 months 2 weeks). The final diagnosis of the nodule was determined by pathology reports or after at least 2 years of follow-up to ensure nodule stability and, therefore, benignity. Two radiologists independently reviewed MR images of the nodules, noting the size, signal intensity on T1- or T2-weighted images, and homogeneity of contrast enhancement. RESULTS: Nine (13%) of the 68 nodules were hepatocellular carcinomas (HCCs). The size of nodules on the first MR examination was between 4 and 20 mm (mean size, 9.5 mm). No significant correlation between the diagnosis of HCC and nodule signal intensity (p = 0.48) or contrast enhancement homogeneity (p = 0.56) on first MR examination was found. Positive predictive value (PPV) and negative predictive value (NPV) for diagnosing HCC on the basis of nodule growth were 100% and 98%, respectively. For diagnosing HCC on the basis of a change in nodule signal intensity, the PPV was 60% and the NPV was 91%. For diagnosing HCC on the basis of a change of enhancement homogeneity, the PPV was 63%, and the NPV was 94%. CONCLUSION: A finding of growth in small, early-enhancing nodules in patients with cirrhosis is highly predictive of HCC. When small nodules are observed on a single examination, close follow-up of the patient appears appropriate.

Adult↗