血精液を主訴とした精嚢腺筋症の1例

62歳, 男性.血精液を主訴として来院.精嚢炎を疑い抗菌剤投与を行い軽快した。その後再発したため, 尿道膀胱鏡を行ったが異常を認めなかった.精嚢造影では右精嚢は描出されず, CTにて前立腺右背側に内容均一な腫瘤を認めた。経直腸超音波検査にて右精嚢の腫大を認め, 超音波ガイド下生検を行ったところ, 明らかな異常所見をえられなかった.診断目的で手術を行い前立腺および精嚢を摘出した.病理学的診断は精嚢腺筋症であった.A 62-year-old man presented in 1987 with hematospermia. No abnormal findings were observed by cystourethroscopy. Ultrasound showed the enlargement of the right seminal vesicle. The right seminal vesicle could not be visualized by seminal vesiculography. Computed tomographic scan revealed a homogeneous mass at the right dorsolateral aspect of the prostate. Surgical exploration was performed. The prostate and bilateral seminal vesicle were resected. Pathological diagnosis was adenomyosis of the right seminal vesicle

Eextaemely Lumnous Supernova 2006gy at Late Phase: Detection of Optical Emission From Supernova

Supernova (SN) 2006gy is an extremely luminous Type IIn SN characterized by the bright peak magnitude M-R similar to -22 mag and its long duration. The mechanism giving rise to its huge luminosity is still unclear. We performed optical spectroscopy and photometry of SN 2006gy at late time, similar to 400 days after the explosion, with the Subaru/FOCAS in a good seeing condition. We carefully extracted the SN component, although there is an ambiguity because of the contamination by bright nucleus of the host galaxy. We found that the SN faded by similar to 3 mag from similar to 200 to similar to 400 days after the explosion (i.e., by similar to 5 mag from peak to similar to 400 days) in R band. The overall light curve is marginally consistent with the Ni-56 heating model, although the flattening around 200 days suggests the optical flux declined more steeply between similar to 200 and similar to 400 days. The late time spectrum was quite peculiar among all types of SNe. It showed many intermediate width (similar to 2000 km s(-1) FWHM) emission lines, e. g., [Fe II], [Ca II], and Ca II. The absence of the broad [O I] 6300, 6364 line and weakness of [Fe II] and [Ca II] lines compared with Ca II IR triplet would be explained by a moderately high electron density in the line emitting region. This high-density assumption seems to be consistent with the large amount of ejecta and low expansion velocity of SN 2006gy. The H alpha line luminosity was as small as similar to 1 x 10(39) erg s(-1), being comparable with those of normal Type II SNe at similar epochs. Our observation indicates that the strong circumstellar medium interaction had almost finished by similar to 400 days. If the late time optical flux is purely powered by radioactive decay, at least M(Ni-56) similar to 3 M-circle dot should be produced at the SN explosion. In the late phase spectrum, there were several unusual emission lines at 7400 angstrom-8800 angstrom and some of them might be due to Ti or Ni synthesized at the explosion

Nebular Phase Observations of the Type Ib Supernova 2008D/X-ray Transient 080109: Side-Viewed Bipolar Explosion

We present optical spectroscopic and photometric observations of supernova (SN) 2008D, associated with the luminous X-ray transient 080109, at >300 days after the explosion (nebular phases). We also give flux measurements of emission lines from the H II region at the site of the SN, and estimates of the local metallicity. The brightness of the SN at nebular phases is consistent with the prediction of the explosion models with an ejected 56Ni mass of 0.07 Msun, which explains the light curve at early phases. The [O I] line in the nebular spectrum shows a double-peaked profile while the [Ca II] line does not. The double-peaked [O I] profile strongly indicates that SN 2008D is an aspherical explosion. The profile can be explained by a torus-like distribution of oxygen viewed from near the plane of the torus. We suggest that SN 2008D is a side-viewed, bipolar explosion with a viewing angle of > 50^{\circ} from the polar direction.Comment: 6 pages, 7 figures, Accepted for publication in Ap

Discovery of the Fastest Early Optical Emission from Overluminous SN Ia 2020hvf: A Thermonuclear Explosion within a Dense Circumstellar Environment

Ia型超新星の爆発直後の閃光を捉えることに成功 --特異な爆発に至る恒星進化の謎に迫る--. 京都大学プレスリリース. 2021-12-10.In this Letter we report a discovery of a prominent flash of a peculiar overluminous Type Ia supernova, SN 2020hvf, in about 5 hr of the supernova explosion by the first wide-field mosaic CMOS sensor imager, the Tomo-e Gozen Camera. The fast evolution of the early flash was captured by intensive intranight observations via the Tomo-e Gozen high-cadence survey. Numerical simulations show that such a prominent and fast early emission is most likely generated from an interaction between 0.01 M⊙ circumstellar material (CSM) extending to a distance of ∼10¹³ cm and supernova ejecta soon after the explosion, indicating a confined dense CSM formation at the final evolution stage of the progenitor of SN 2020hvf. Based on the CSM–ejecta interaction-induced early flash, the overluminous light curve, and the high ejecta velocity of SN 2020hvf, we suggest that the SN 2020hvf may originate from a thermonuclear explosion of a super-Chandrasekhar-mass white dwarf (“super-MCh WD”). Systematical investigations on explosion mechanisms and hydrodynamic simulations of the super-MCh WD explosion are required to further test the suggested scenario and understand the progenitor of this peculiar supernova