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( Hiroyuki Yazawa ),( Tsuyoshi Hiraiwa ),( Fumihiro Ito ),( Keiya Fujimori ) 대한산부인과학회 2017 Obstetrics & Gynecology Science Vol.60 No.6
We describe an extremely rare case of advanced pure primary ovarian squamous cell carcinoma (SCC), treated by adjuvant chemotherapy with dose-dense paclitaxel combined with carboplatin (dd-TC) plus the combination chemotherapy with irinotecan and cisplatin (CPT-P), with long-term recurrence-free survival. A 71-year-old woman complaining of lower abdominal pain was referred to our hospital and a 7-cm-diameter solid tumor was identified. She was diagnosed with a left ovarian tumor that was highly suspicious for malignancy based on ultrasonography, magnetic resonance imaging, and contrast-enhanced computed tomography. Bilateral salpingo-oophorectomy, low-anterior colon resection, and colostomy were performed. Intra- and post-operative histopathological diagnosis revealed International Federation of Gynecology and Obstetrics stage IIIc well-differentiated pure ovarian SCC. As adjuvant chemotherapy, 2 courses of dd-TC were administered, followed by 3 courses of CPT-P; the patient then underwent 4 additional courses of dd-TC. Both regimens were effective and there has been no recurrence or metastasis thus far in the 5 years since the operation.
Detached plasma control by H- / D- negative ion in divertor simulator
akira Tonegawa,Hiroyuki YAZAWA,Kazutaka KAWAMURA,Masataka ONO,Syusaku MAETA 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
We have developed a new way to stably maintain a detached hydrogen or deuterium plasma based on feedback control of the relative negative-ion (H.or D.) density in the linear divertor plasma simulator, TPD-SheetIV. Measurements of the relative negative ion density, nH.or nD., heat load to the target plate, Q, and the secondary gas-flow rate, Gdiv, were carried out as a function of neutral pressure in the plasma. The detached plasma is steadily maintained in the region of the target plate by rapidly varying Gdiv so as to maximize the value of the n.Hor n.Dand to keep the gas pressure constant. The new system has achieved the goal of reducing both Q and the amount of Gdiv in a detached plasma without radiative and three-body recombination processes.
Observation of disossiative recombination in the hydrogen sheet plasma
akira Tonegawa,Hiroie MATSUMOTO,Hiroyuki YAZAWA,Kazutaka KAWAMURA,Masataka ONO,Takehisa SHIBUYA 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The experimental observation of dissociative recombination in Molecular Assisted Recombination (MAR) for hydrogen detached plasma has been studied in the linear divertor plasma simulator, TPD-SheetIV. Measurements of the relative concentrations of atomic and molecular ions (nH+, n+ H2, and n+ H3), electron density (ne), electron temperature (Te), and heat load to the target plate (Q) were carried out in hydrogen detached plasma with hydrogen gas puff at varying discharge current. An “omegatron” mass analyzer, situated behind a small hole of the endplate, is used for analyzing ion species. It is shown from these results that the dominant molecular process is a dissociative recombination process via H+ 2 , H+ 3 in the plasma over the range of low plasma density (<5 × 1018 m.3) and low hydrogen pressure (<4 mTorr). In contrast, molecular assisted dissociation (MAD) always dominates over the MAR in the high density plasma (>5 × 1018 m.3).