H. pylori-infected ITP patients have a corpus-predominant pattern of gastritis but the virulence profile of their strains does not differ from that of ulcer or NUD patients. Eradication of H. pylori infection is a good therapeutic option for some patients with chronic ITP, especially for those who develop ITP in older age.

A case of infantile acute monocytic leukemia (AMoL), which was probably transmitted from a pregnant woman with leukemia to her unborn infant, is presented. A woman had AMoL when her third infant was born. This infant, who was a boy, also suffered from AMoL when he was 20 months of age. The infant's leukemic cells had the same cytochemical and immunophenotypic patterns as the mother's leukemic cells. By cytogenetic analysis, the majority of the infant's leukemic marrow cells had the 46,XX karyotype and showed no Y body by quinacrine staining. Moreover, the phenotype for human major histocompatibility system, HLA-A, HLA-B, and HLA-DR of the infant's leukemic cells was consistent with that of the mother's lymphocytes. Thus, the infant's leukemic clone was found to be identical to the mother's leukemic clone. His lymphocytes could not react with the mother's leukemic cells or his own leukemic cells in mixed lymphocyte culture, suggesting that the HLA homozygosity of the mother may have played a role in inducing immunologic tolerance to the immigrated leukemic cells in the infant. This is the first report of an infantile leukemia transmitted from a mother with leukemia, supposedly through the placenta.

We have fabricated buried channel (BC) MOSFETs with a thermally grown gate oxide in 4H-SiC. The gate oxide was prepared by dry oxidation with wet reoxidation. The BC region was formed by nitrogen ion implantation at room temperature followed by annealing at 1500 C. The optimum doping depth of the BC region has been investigated. For the nitrogen concentration of 1 10 17 cm 3 , the optimum depth was found to be 0.2 m. Under this condition, the channel mobility of 140 cm 2 /Vs was achieved with the threshold voltage of 0.3 V. This channel mobility is the highest reported so far for a normally-off 4H-SiC MOSFET with a thermally grown gate oxide.Index Terms-4H-SiC, buried channel (BC), channel mobility, MOSFET.

A concept, polarization junction (PJ), for overcoming the trade-off relationship between the area-specific on-resistance and the breakdown voltage of unipolar power devices is presented. The PJ concept is based on the charge compensation of positive and negative polarization charges at heterointerfaces. The PJ has a similar effect as superjunction without impurity doping. The performance of GaN-based conventional devices and PJ devices have been compared using numerical device simulations. Area-specific on-resistance of PJ devices became less than 1∕10 than that of conventional devices for the breakdown voltage higher than 300V.

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The first Japanese case of alveolar hydatid disease with cutaneous-subcutaneous lesions is reported. The patient, a 58-year-old man who developed an indurated subcutaneous tumor on the right side of the abdomen, had had partial hepatectomy of the right lobe for echinococcosis thirteen years earlier. Clinically, the tumor was adherent with a fistulosis communication to deeper structures. Histopathologically, multiple PAS-positive cuticular layers with foreign body granulomas and fibrosis were observed between the dermis and subcutaneous fatty tissue. Surgical excision of the swelling provided the patient with temporary relief. To our knowledge, only eight cases of subcutaneous alveolar hydatid disease have been reported throughout the world. Ours, the ninth case, highlights the importance and difficulty of treating of alveolar hydatid disease.

This paper mainly aims at evaluating capabilities of derivation of ionospheric conductivities using two principal auroral emissions (427.8 and 630 nm). We have evaluated a photometric method of derivation of ionospheric conductivities based on simultaneous observations of a photometer (field of view = ~1.2°), a digital camera, and the EISCAT UHF radar (field of view = ~0.7°) operated at Tromsø, Norway (69.6°N, 19.2°E), for two nights on October 10 and 11, 2002. We have compared height-integrated Pedersen and Hall conductivities with a post-integration time of 10 s derived from EISCAT UHF radar observations and photometer observations with wavelengths of 427.8 and 630.0 nm. Sky images taken with the digital camera are utilized for distinguishing types of auroras in the views of the EISCAT UHF radar and the photometer. In general, a good agreement of temporal variations of the height-integrated Pedersen and Hall conductivities was found between EISCAT and photometer values. In cases of auroral arcs passing by in the field of view, however, differences in derived values between the two methods were found. Possible causes of the differences are discussed. We conclude that (1) the photometric method using 427.8 and 630 nm can capture temporal variations of the conductivities well, but unavoidable underestimations of the Pedersen (about 30-40%) and the Hall (about 50-60%) conductivities are involved, and (2) care is necessary for using photometric observational data when auroral arcs appear in the field of view.

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