No abstract available.
Asthma* ; Child* ; Humans

No abstract available.

No abstract available.
Dilatation* ; Urethra*

Congenital obstuction of pulmonary vein without anomalous drainage can cause long-standing pulmonary congestion and pulmonary arterial hypertension, and it may include stenosis of individual pulmonary veinsor total pulmonary vein atresia. We reviewed seven cases of pulmonary vein obstruction, five of which accompanied other cardiac anomalies. Right pulmonary veins were involved in all seven cases including one bilateral case. Pulmonary veins were occluded totally in five and partially in three lungs. Pumonary catheterization and angiography were done for diagnosis. Chest radiographs of total occlusion cases showed decreased lung volume, features of pulmonary edema, interstitial lesions, and pleural thickening, which were quite specific, whereas pulmonry venous dilatation was dominant findings in partial obstruction cases. Pulmonary perfusion scans (n=3) showed total perfusion defects in the cases of total occlusion of veins. MR imaging (n=2) demonstrated total occlusion of pulmonary veins in the venoatrial junction in two, and membranous focal obstruction in one lung. Two patients had pneumonectomy and histological confirmation, Although catheterization and angiography are essential for the diagnosis, MR imaging is thought to be useful for the diagnosis of pulmonary vein obstruction.
Angiography ; Catheterization ; Catheters ; Constriction, Pathologic ; Diagnosis ; Dilatation ; Drainage ; Estrogens, Conjugated (USP) ; Humans ; Hypertension ; Lung ; Magnetic Resonance Imaging ; Perfusion ; Pneumonectomy ; Pulmonary Edema ; Pulmonary Veins* ; Radiography, Thoracic ; Veins

PURPOSE: To investigate the Doppler ultrasonographic parameters of a carotid ultrasound (CUS) for the stenosis of the intracranial internal carotid artery (IICA). MATERIALS AND METHODS: The authors evaluated 15 patients with normal extracranial ICA, the common carotid artery (CCA), and stenosis of IICA (patient group). The control group consisted of 22 patients with normal findings on a magnetic resonance angiography (control group). All subjects were subjected to a CUS, whereas subjects from the patient group underwent a cerebral angiography. The following parameters were investigated: peak systolic velocity (PSV) and end diastolic velocity (EDV) in ICA, PSV in CCA, resistive index (RI) in ICA, and PSV ratio. Stenosis was measured following an angiography and was graded as follows: normal (0-24%), mild (25-49%), moderate (50-69%), and severe (70-99%). Next, the CUS findings, which reflected the IICA stenosis, were investigated. RESULTS: Of the 74 ICAs, 52 were normal (44 ICAs in the normal group and 8 ICAs in the patient group), 10 had mild stenosis, 8 had moderate stenosis, and severe 4 had severe stenosis. As the stenosis grade increased, PSV and EDV in ICA as well as PSV in CCA, decreased (p value < 0.05); however, the PSV ratio and RI remained unchanged. CONCLUSION: As stenosis of IICA increases, PSV and EDV of ICA and PSV of CCA decreases following a CUS.
Angiography ; Atherosclerosis ; Carotid Artery, Common ; Carotid Artery, Internal ; Carotid Stenosis ; Cerebral Angiography ; Constriction, Pathologic ; Copper ; Humans ; Magnetic Resonance Angiography ; Ultrasonography, Doppler

No abstract available.
Catechols ; Cytochrome P-450 Enzyme System ; Cytochromes ; Fatty Alcohols ; Humans ; Liver ; Microsomes, Liver

Perineurial cells, which normally surround the nerve fascicles within a nerve, can be distinguished from Schwann cells by their immunoreactivity for epithelial membrane antigen (EMA) and lack of reactivity for S-100 protein. Perineurioma is a form of benign peripheral nerve sheath tumor (PNST) almost exclusively composed of perineurial cells. It is often difficult to differentiate this tumor from the other benign PNSTs or ectopic meningioma by histology alone. Immunohistochemical and electron microscopic studies are helpful for differential diagnosis. We recently experienced a case of soft tissue perineurioma in a 14-year-old girl. This tumor was presented as a 5.6 cm sized subcutaneous movable mass in the elbow. The well encapsulated soft tissue tumor consisted of spindle cells which have whorling and storiform patterns within the collagenous stroma. The spindle cells were stained positive for EMA but negative for S-100 protein, chromogranin, neuron-specific enolase or Leu-7. Ultrastructurally, they possessed long cytoplasmic processes with incomplete basal lamina, primitive intercellular junction and occasional pinocytotic vesicles.
Adolescent ; Basement Membrane ; Collagen ; Cytoplasm ; Diagnosis, Differential ; Elbow ; Female ; Humans ; Immunohistochemistry ; Intercellular Junctions ; Meningioma ; Microscopy, Electron ; Mucin-1 ; Nerve Sheath Neoplasms* ; Peripheral Nerves ; Phosphopyruvate Hydratase ; S100 Proteins ; Schwann Cells

A cerebral infarction in a newborn infant is not uncommon and is major cause of neonatal seizure. The author encountered one case of cerebral infarction that was assumed to be related to a portal vein thrombosis, and reports the radiology findings of a neonatal cerebral infarction and portal vein thrombosis.
Cerebral Infarction* ; Humans ; Infant, Newborn ; Portal Vein* ; Seizures ; Thrombosis ; Venous Thrombosis*

No abstract available.
Humans ; Infant* ; Streptococcal Infections*

No abstract available.
Lung*