Tatsuo Shiigai

Learn More
BACKGROUND AND PURPOSE Pure sensory stroke (PSS) usually is caused by a lacunar infarct; reports of PSS caused by cerebral hemorrhage have been rare. We correlated clinical and neuroradiologic findings in patients with PSS caused by cerebral hemorrhage. METHODS We retrospectively studied seven patients with appropriate clinical findings and lesions(More)
Results of serial positron emission tomography (PET) in a biopsy-proven case of gliomatosis cerebri (GC) are reported. Computed tomography (CT) with and without contrast failed to detect focal abnormalities, but magnetic resonance (MR) revealed iso-intensity or low-intensity lesions in T1-weighted images and high-intensity lesions in T2-weighted images.(More)
We report two cases of reversible brainstem hypertensive encephalopathy (RBHE) with unusual magnetic resonance (MR) findings. Patient 1, an 85-year-old man without a history of hypertension, developed acute severe hypertension and mild consciousness disturbance as the only symptoms. Patient 2, a 46-year-old man with an untreated hypertension, presented with(More)
A case of hypertrophic cranial pachymeningitis is described and the MR appearance presented. A gadopentetate-dimeglumine-enhanced MR scan enhanced markedly suggesting thickening and inflammation of dura and falx cerebri. The patient, a 72-year-old elderly man, had surprisingly little clinical abnormality. His only neurological manifestation was progressive(More)
We investigated the risk factors for silent lacunar infarction and etat criblé detected by magnetic resonance imaging (MRI). Previous reports have evaluated white matter hyperintensities (WMHs) and periventricular hyperintensities (PVHs) on T2-weighted images, but have not distinguished between lacunar infarcts, état criblé, and leukoaraiosis of(More)
Fifty-nine cases of glycyrrhizin (licorice)-induced hypokalemic myopathy (GIHM), 2 females treated in our departments (85 and 73 years old) and 57 cases reported in the literature were studied, and conditions leading to the onset, factors, clinical manifestations, laboratory assessments, muscle biopsy findings, treatment and outcome were discussed. The 59(More)
To clarify the mechanism(s) of HCO3- (or related base) transport across the basolateral membrane, rabbit proximal straight tubules were perfused in vitro, and intracellular pH (pHi) and Na+ activity (aiNa) were measured by double-barreled ion-selective microelectrodes. Lowering bath HCO3- from 25 to 5 mM at constant PCO2 depolarized basolateral membrane(More)
BACKGROUND Metabolic acidosis leads to chronic kidney disease (CKD) progression. The guidelines recommend a lower limit of serum bicarbonate level, but no upper limit. For serum bicarbonate level to be clinically useful as a therapeutic target marker, it is necessary to investigate the target serum bicarbonate level within the normal range to prevent CKD(More)
Article abstract-A 65-year-old woman presented with a left abduction deficit and "red eye," mild proptosis, chemosis, arterialization of the conjunctival vessels, intention tremor, and bilateral pyramidal signs. MRI showed significant left-sided brainstem involvement that mimicked a tumor. Right hemiplegia ensued 1 week later. Venous congestion of the(More)
A 47-year-old woman affected by systemic lupus erythematosus (SLE) presented with headache, fever, splenomegaly and edema of the lower extremities. CT showed diffuse low density in the cerebral white matter and marked splenomegaly in the abdomen. T2-weighted MR images showed diffuse high intensity lesions in the white matter. After immunosuppressive therapy(More)