Splenic artery pseudoaneurysm is a relatively rare and potentially life-threatening complication of chronic pancreatitis. The authors present a case of splenic artery pseudoaneurysm complicating ,chronic pancreatitis. It was converting into a pseudoaneurysm by vessel rupturs. In this case report, color doppler US, CT, and MRI made the definite diagnosis.
Aneurysm, False* ; Diagnosis ; Magnetic Resonance Imaging ; Pancreatitis, Chronic* ; Splenic Artery*

PURPOSE: To evaluate the effectiveness and the most accurate element of the diagnostic criteria of the Japan Society of Uitrasonics in medicine(JSUM, Nov. 1989) for distinguishing between benign and malignant solid breast masses on the US. METHODS AND MATERIALS: We analyzed the ultrasonic findings of histopathologically proved 51 fibroadenomas, 12 fibrocystic disease, and 39 breast cancers in relation to the diagnostic criteria of the JSUM (shape, border, boundary echo, internal echo, posterior echo, lateral echo, and depth/width ratio). RESULTS: The number of cases of fibroadenoma, fibrocystic disease, and breast cancer corresponding to the diagnostic criteria was in the shape(26/51, 5/12, 33/39), border(41/51, 9/12, 29/39), boundary echo(48/51, 12/12, 27/39), internal echo(43/51, 9/12, 24/39), posterior echo(32/51, 3/12, 21/39), and lateral shadowing(15/51, 1/12, 35/39). All diagnostic criterias showed statistical significance for differentiation of benign/malignant breast mass on the US(Chi-square test: p<0.05). The order of accuracy was boundary echo, internal echo, and border. The mean of depth/width ratio was 0.54 +/- 0.15, 0.52 +/- 0.12, and 0.69 +/- 0.21 in fibroadenoma, fibrocystic disease, and breast cancer respectively and it had statistical significance for differentiation of benign/malignant breast mass on the US(ANOVA test: p=0.0002). CONCLUSION: The diagnostic criteria of JSUM is effective for differentiation of benign/malignant breast solid masses on the US and has accuracy in the order of boundary echo, internal echo, and border. Depth/width ratio also has statistical significance.
Breast Neoplasms ; Breast* ; Fibroadenoma ; Japan* ; Ultrasonics*

PURPOSE: The purpose of this study is to find some points that may help the differential diagnosis of ring lesions in magnetic resonance (MR) imaging of the liver through recognition of the characteristics of the morphology and the signal intensities of the ring lesions. MATERIALS AND METHODS: T1- and T2-weighted axial spin-echo images and gadolinium-enhanced Tl-weighted images were obtained with a 1.0 T superconducting MR imager. We reviewed the MR findings of 23 hepatic ring lesions which were confirmed as hepatocellular carcinomas (13), metastases (4), liver abscesses (4), hydatid cyst (1), and hematoma (1). RESULTS: There were 19 single rings and 4 double rings (all the cases were liver abscesses) on Tl-weighted images, and 8 single rings and 14 double rings on T2-weighted images. The signal intensity of the ring was low in hepatocellular carcinoma on Tl-weighted images and in hydatid cyst on T2-weighted images. It was high on Tl-weighted images in subacute hemaroma. Target lesion as an inner high-signal-intensity ring surrounded by a high-signal-intensity ring on T2-weighted images was seen in metatasis, liver abscess, and hepatocellular carcinoma. CONCLUSION: It is helpful to recognize the chracteristics of morphology and signal intensities of the ring lesions in the differential diagnosis of hepatic focal lesions.
Carcinoma, Hepatocellular ; Diagnosis, Differential ; Echinococcosis ; Hematoma ; Liver Abscess ; Liver* ; Magnetic Resonance Imaging* ; Neoplasm Metastasis

In 10 cases with intracranial arterivenous malformation (AVMs) diagnosed by MR spin echo images, MR angiography was evaluated and compared with conventional angiography in regard to depiction of nidus, arterial feeders, and draining veins. Spin echo images demonstrated the nidus of the AVM in all cases, but displayed the feeding vassels inadequately. These vessels were directly visualized with 3 dimensional STAGE(small tip angle gradient echo) MR angiography using rephasing/dephasing pulse sequences. In 5 cases MR angiography and conventional angiography showed the same results. However, in the others, MR angiography showed lower resolution than conventional angiography. MR angiography is useful in preangiographic evaluation of intracranial AVM but improvement in image resolution, which is dependent on MR hard ware and pulse sequence, is still to be desired.
Angiography* ; Intracranial Arteriovenous Malformations* ; Veins

To evaluate of the relationship between basal ganglia lesion and portal-systemic encephalopathy, eleven patients who had clinically proved liver cirrhosis with superior mesenteric vein larger than 10mm in diameter on ultrasonogram underwent brain MR imaging. No evidence of clinical or neuropsychiatric disturbance was observed in any patient at the time of the MR examination. Brain MR imaging revealed basal ganglia lesion characterized by bilateral, symmetric, high signal intensity without edema or mass effect on spin echo T1-weighted images in nine patients which included three patients with the past history of portal-systemic encephalopathy. It was concluded that excepted in the circumstances of other causes of the high signal intensity in basal ganglia on T1-weighted images such as fat, methemoglobin, melanin, neurofibromatosis, dense calcification, and parenteral nutrition, bilateral and symmetric high signal intensity lesion, in basal ganglia would be a useful MR finding of subclinical portal-systemic encephalopathy in liver cirrhosis patients with no clinical or neuropsychiatric symptoms and larger than 10mm diameter of superior mesenteric vein in ultrasonography.
Basal Ganglia* ; Brain ; Edema ; Hepatic Encephalopathy* ; Humans ; Liver Cirrhosis* ; Liver* ; Magnetic Resonance Imaging* ; Melanins ; Mesenteric Veins ; Methemoglobin ; Neurofibromatoses ; Parenteral Nutrition ; Ultrasonography

In air leak syndrome, a significant portion of the volume delivered during a positive pressure breath can be lost through the leak. HFOV can achieve adequate ventilation at lower peak and/or mean intrapulmonary pressure than conventional mechanical ventilation (CMV) and has been an effective treatment of already established air leak syndrome. We report a 1-day-old male infant with severe respiratory failure from pneumothorax and pneumomediastinum, who was refractory to CMV with chest tube drainage. HFOV was applied to this patient for 114 hours, and improvement of oxygenation and ventilation as well as significant reduction of pneumothorax followed.
Chest Tubes ; Drainage ; Humans ; Infant ; Male ; Mediastinal Emphysema ; Oxygen ; Pneumothorax ; Respiration, Artificial ; Respiratory Insufficiency ; Ventilation*

No abstract available.
Cystectomy*

No abstract available.
Adult* ; Fetus* ; Humans ; Humerus* ; Radius* ; Ulna*

No abstract available.
Gerbillinae

Single breath-hold gradient echo images with Small Tip. Angle Gradient Echo(STAGE) were evaluated in the study of liver in 16 patients(4 normal liver, 5 hepatoma, 5 cholangiocarcinoma, 1 hemangioma, 1 cavernous transformation of portal vein). We obtained one slice of gradient echo during single breath-hold at the level of pathology defined on conventional spin echo inage. Single breath-hold gradient echo images were compared with spin echo images for image quality and artifacts. Single breath-hold gradient image showed improved resolution of vascular detail and excellent contrast between lesion and adjacent normal liver in hepatoma. Cholangiocarcinoma showed decreased contrast between lesion and biliary trees but improved contrast between lesion and blood vessel. Cavernous transformation of porta vein was noted as tortuous vessel of high signal intensity. Single breath-hold gradient echo scan increased vascular artifact, but decreased respiratory artifact leading to improved image quality. Single breath-hold technique can reduce can reduce imaging time and improve image quality and may be used as complementary method to the spin echo scan.
Artifacts ; Blood Vessels ; Carcinoma, Hepatocellular ; Cholangiocarcinoma ; Hemangioma ; Liver* ; Magnetic Resonance Imaging* ; Methods ; Pathology ; Trees ; Veins