Benign Pigmented Schwannoma of the Great Omentum: Report of a Rare Case and Review of the Literature

Schwannoma in the abdomen is an uncommon neoplasm that occurs most frequently in the cranial and peripheral nerves; it is extremely rare in the great omentum and only 6 cases of schwannoma of the great omentum have been observed previously. We report the case of a schwannoma found in the great omentum of a 55-year-old man who was treated with laparoscopic surgery. Though it was difficult to diagnose preoperatively, the tumor showed malignant potential by rapidly increasing in size. Histologically it was configured by a well-encapsulated round mass measuring 30 × 18 × 15 mm in diameter. Immunohistochemically most of the neoplastic cells reacted moderately to NSE, NCAM and S-100 protein. We document the clinicopathological study of a schwannoma of the great omentum, followed by a review of the literature

Subcutaneous Achilles tendon rupture in an eighty-year-old female with an absence of risk factors

Achilles tendon ruptures rarely occur in patients over 80 years of age. However, it is unclear what treatment, surgical or conservative, is suitable for such an Achilles tendon rupture in the elderly. In addition, the clinical results of an Achilles tendon rupture in the elderly are disappointing. We report here the case of a subcutaneous Achilles tendon rupture in an eighty-year-old, healthy female, who returned to her previous level of activity following surgical treatment. Additional case reports of other instances of successful treatment are needed to help establish the optimal treatment protocol for an Achilles tendon rupture in the elderly

Microinstabilities in hydrogen- and helium-dominated multi-ion-species plasmas in LHD

The ion scale microinstabilities in the large helical device (LHD) are investigated by the gyrokinetic simulations for the multi-ion-species plasmas including hydrogen, helium, and impurity ions. The observations in the LHD experiments show that the ion temperature increases with the decreases of the ratio of hydrogen density to helium density. It is found from the linear gyrokinetic simulations with the multi-ion-species and real-mass kinetic electrons in the LHD discharges that the growth rates of the ion scale microinstabilities are reduced for the helium-dominated multi-species plasma compared with the hydrogen-dominated one. In addition to the differences of the conditions including the temperature, the density profiles, and the temperature ratio between both plasmas, due to the dependence on the mass number and the electric charge of the mixed ion species, the mixing length estimates obtained from the linear simulations predicts smaller ion thermal diffusivity for the helium-dominated plasma than the hydrogen-dominated one in the hydrogen gyro-Bohm unit, which is consistent with the experimental results

乗鞍岳における融雪期の積雪中の化学物質の動態

A snow pit study was conducted on Mt. Norikura in the Northern Japan Alps from January to April to clarify the chemical dynamics in the snowpack during the snowmelt season. Little snowmelt occurred before February , the first snowmelt occurred between February and , and the peak of the snowmelt season occurred after March . Snow layers with remarkably high Cl , NO , and SO concentrations in the snowpack were traced; furthermore, the snow layers with high SO concentrations were found to disappear first. It was concluded that the ease with which the ions were flushed out from the snowpack was SO NO Cl.ArticleBulletin of Glaciological Research. 26:9-14 (2008)journal articl

北アルプスの山地流域における水収支と物質収支

We have investigated the water balance and mass balance for four years in Maekawa River basin on the eastern slope of Mt. Norikura-dake. In this region, the precipitation frequency is high from the rainy season to the autumn. The maximum base-flow discharge occurs in the spring snowmelt season. The pH and electric conductivity of the river water decline rapidly with the beginning of the snowmelt runo and temporarily decrease when the discharge increases temporarily in the rainy season or during a typhoon event. The Cl concentration of the river water increases in the early stage of snowmelt season since there is a considerable amount of sea salt in the snow. In addition, the NO concentration of the river water increases when the rainfall increases the discharge. The major ion concentration of the river water, except Cl and NO almost synchronizes with the change in the electric conductivity. In the mass balance of cations, the runo rate from the river basin considerably exceeds the atmospheric deposition rate to the river basin. This is because there is extremely much elution of ions from new volcanic rocks and soils. Further, the atmospheric deposition rate of NO is larger bigger with the biological consumption in the river basin than the runo rate from the basin.ArticleBulletin of Glaciological Research. 26:1-8 (2008)journal articl

Discrepancies between pathological examination and imaging analysis after primary systemic chemotherapy for breast cancer: report of two cases

Primary systemic chemotherapy (PSC) in breast cancer prolongs disease-free survival in patients who have obtained pathological complete remission (pCR). In combination with pathological examination, CT and MRI have been used to evaluate the efficacy of PSC, they generally coincide well with pathological evaluation. We here present two cases showing discrepancies between pathological examination and imaging analysis after PSC in breast cancer. We should keep such discrepancies in mind to determine the ideal treatment after PSC. An accurate method of evaluating cellular damage by PSC is needed