Search

Your search keyword '"Kitada, Masahiro"' showing total 511 results
Start Over Author "Kitada, Masahiro"
511 results on '"Kitada, Masahiro"'

234. Nodular fasciitis of the breast clinically resembling breast cancer in an elderly woman: a case report.

Author

Satoshi Hayashi, Shunsuke Yasuda, Nana Takahashi, Satoshi Okazaki, Kei Ishibashi, Masahiro Kitada, Naoyuki Miyokawa, Hayashi, Satoshi, Yasuda, Shunsuke, Takahashi, Nana, Okazaki, Satoshi, Ishibashi, Kei, Kitada, Masahiro, and Miyokawa, Naoyuki

Subjects
NODULAR fasciitis, BREAST biopsy, HISTOPATHOLOGY, CASE studies
Abstract

Background: Nodular fasciitis is a benign reactive proliferative lesion of fibroblast cells, which can occur throughout the body. However, it has rarely been reported in the breast of an elderly woman.Case Presentation: Our patient was an 88-year-old Asian woman who had noticed a mass in her right breast for 1 month before presentation to our hospital. The mass was elastic-hard and 20 mm in size. No qualitative diagnosis was made by core needle biopsy. Because of potentially malignant findings on mammography and ultrasonography, she underwent an excisional biopsy. Microscopically, spindle cell proliferation with abundant elastic fibers were observed. The tumor cells were positive for α-smooth muscle actin and negative for pancytokeratin, β-catenin, and cluster of differentiation 34. Based on these morphological and immunohistochemical features, a diagnosis of nodular fasciitis was made. All resection margins in the specimen were tumor-free. The patient has been disease-free for over 12 months.Conclusions: Nodular fasciitis shows clinical features and imaging findings similar to those of breast cancer. To avoid unnecessary surgery, nodular fasciitis should be taken into consideration when there is spindle cell proliferation found by biopsy. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
View/download PDF

240. Magnetic properties of permalloy/permalloy-oxide multilayer thin films

Author

Kitada, Masahiro

Abstract

Abstract: Magnetic properties of permalloy/permalloy-oxide multilayer thin films are investigated. These thin films are prepared by a repeat of sputter deposition of permalloy thin film, followed by oxidation of the film surface. The total thickness of the permalloy thin films before oxidation is about 100 nm. The number of layers is one to twenty. The oxide layers are formed by oxidation in dry air. The estimated oxide layer thickness is about 2 nm. The oxide NiFe2O4 is identified by RHEED. The film coercivity decreases linearly with increasing layer numbers. The saturation magnetization and magnetoresistivity decrease as the number of layers increase. The coercivity decrease is due to grain growth suppression and magnetic separation by oxide film of permalloy layer, and magnetoresistivity decrease is due to electrical resistivity increase originating into electron scattering by the oxide layer.

Published
1991
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results