Haruyuki Yamada

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A case of meningioma coexisting with both lipomatous and secretory components, the latter characterized by hyaline inclusion bodies, is reported. The neuroradiological features of lipomeningioma are reevaluated, and the possible pathogenetic mechanisms of this unique combination in the present case are discussed.
We have directly measured the relative distribution and steady state pool sizes of T4 and T3 in blood and extrathyroidal tissues of the whole euthyroid male rat, plus several steady state T3 and T4 metabolism indices in the whole animal, in eight rats infused sc for 7 days with labeled 125I-T3 (T3*) or 125I-T4 (T4*) via implanted minipumps. Liver, kidneys,(More)
Food deprivation markedly reduces thyroid hormone levels in mammalian plasma, but existing data are incomplete and equivocal regards extrathyroidal hormone production and other indices of overall hormone economy. We have used a novel experiment design and analysis to directly measure the whole-body rate of conversion of T4 into T3 and several other(More)
Electrophysiological and morphological changes of rabbit sciatic nerve during high-speed stretch, stepwise stretch and low-speed stretch were investigated. In the high-speed nerve stretch of ten millimeters, rapid decrease in amplitude with temporal dispersion and delay of peak latency were noted at an early period of the conditioning, revealing a tendency(More)
Steady-state regulation of whole-body T3 and T4 distribution and metabolism were directly evaluated and compared in hypothyroid, euthyroid, and in euthyroid rats moderately T3-stimulated by continuous infusion of 0.15 microg/day L-T3 per 100 g BW, thereby supplementing euthyroid T3 sources by two thirds. Our goal was to develop deeper insights into the(More)
From January 1997 to December 2001, patients with subarachnoid hemorrhage (SAH) among 14,008 residents in an isolated mountainous area; Oguni and Minamioguni towns in Kumamoto Prefecture, were evaluated. The subjects were patients being treated at Oguni Municipal Hospital. Over a period of 5 years, 19 patients were found to be suffering from SAH in this(More)
Enzymatic mechanisms for deiodination of 3,5,3'-triiodothyronine or thyroxine in the phenolic ring (5'-deiodinase) or tyrosyl ring (5-deiodinase) are found in cells of many organs, including the intestinal wall. Deiodinases are highly active in intestinal tissue of developing rat fetuses and relatively inactive in adult intestinal cells, but little is known(More)