Shell Evolution towards ^{78}Ni: Low-Lying States in ^{77}Cu

The level structure of the neutron-rich ^{77}Cu nucleus is investigated through β-delayed γ-ray spectroscopy at the Radioactive Isotope Beam Factory of the RIKEN Nishina Center. Ions of ^{77}Ni are produced by in-flight fission, separated and identified in the BigRIPS fragment separator, and implanted in the WAS3ABi silicon detector array, surrounded by Ge cluster detectors of the EURICA array. A large number of excited states in ^{77}Cu are identified for the first time by correlating γ rays with the β decay of ^{77}Ni, and a level scheme is constructed by utilizing their coincidence relationships. The good agreement between large-scale Monte Carlo shell model calculations and experimental results allows for the evaluation of the single-particle structure near ^{78}Ni and suggests a single-particle nature for both the 5/2_{1}^{-} and 3/2_{1}^{-} states in ^{77}Cu, leading to doubly magic ^{78}Ni.

Aggressive diagnosis and treatment for posterior urethral valve as an etiology for vesicoureteral reflux or urge incontinence in children

Vesicoureteral reflux (VUR) is one of the most common diseases in pediatric urology and classified into primary and secondary VUR. Although posterior urethral valve (PUV) is well known as a cause of the secondary VUR, it is controversial that minor urethral deformity recognized in voiding cystourethrography represents mild end of PUV spectrum and contributes to the secondary VUR. We have been studying for these ten years congenital urethral obstructive lesions with special attention to its urethrographic and endoscopic morphology as well as therapeutic response with transurethral incision. Our conclusion to date is that congenital obstructive lesion in the postero-membranous urethra is exclusively PUV (types 1 and 3) and that severity of obstruction depends on broad spectrum of morphological features recognized in PUV. Endoscopic diagnostic criteria for PUV are being consolidated.

Selection Criteria for Kidney Laterality in Retroperitoneoscopic Living Donor Nephrectomy and the Usefulness of Pretransplant Intervention

OBJECTIVES

To evaluate the selection criteria for kidney laterality and the usefulness of pretransplant intervention in living donor nephrectomy.

METHODS

We compared conventional and revised criteria. The conventional criteria were that left kidneys were chosen in preference and provided the kidney with the fewest structural abnormalities and lowest functional decline and that most renal arteries remained in the donor. From April 2013, we allowed the use of left kidneys with double renal arteries. Patient characteristics and surgical outcomes were retrospectively compared between right and left retroperitoneoscopic living donor nephrectomies.

RESULTS

We compared data for 30 right kidney and 222 left kidney nephrectomies. Right kidneys were selected because of multiple renal arteries (n = 18), structural abnormalities (n = 10) of the left kidney, or functional decline (n = 2) of the right kidney. Right retroperitoneoscopic nephrectomies were associated with significantly longer operating times (267 minutes vs 241 minutes), larger blood losses (240 g vs 55 g), and higher open conversion rates (10% vs 0.9%). Pretransplant intervention was necessary for structural abnormalities in right kidneys, but the amended selection criteria resulted in fewer right nephrectomies. Pretransplant intervention was still necessary by ex vivo arterial anastomosis for multiple left renal arteries, which increased the total ischemia time (94 minutes vs 64 minutes); however, post-transplantation renal function was not significantly different.

CONCLUSIONS

Pretransplant intervention was beneficial both for repairing structural abnormalities and for reducing the difficulties of retroperitoneoscopic living donor nephrectomy.

Arthroscopic decompression with indigo carmine for treating paralabral cysts in the shoulder

Paralabral cysts in the shoulder are a relatively rare pathology. It is sometimes difficult to detect the location of a paralabral cyst in the shoulder using arthroscopy, and it can be difficult to confirm sufficient decompression by arthroscopy. We describe the case of a 64-year-old woman who underwent arthroscopic decompression for a paralabral cyst in the shoulder. Indigo carmine was injected into the cyst under ultrasonography guidance just before the operation. The leakage point of indigo carmine was detected using arthroscopy. Arthroscopic decompression was performed until the indigo carmine was completely discharged. Her shoulder pain, limited range of motion, and muscle weakness during abduction and external rotation improved postoperatively. Magnetic resonance imaging confirmed the disappearance of the cyst. Arthroscopic decompression using an ultrasonography-guided injection of indigo carmine is a useful treatment for a paralabral cyst in the shoulder.

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Sharshir M, Khurshid M, Ali Z, Malgapo M, Jamil M, Shafquat A, Shoukri M, Hijazi M, Abe T, Uchino S, Takinami M, Rangel Neto NR, Oliveira S, Reis FQ, Rocha FA, Moralez G, Ebecken K, Rabello LS, Lima MF, Hatum R, De Marco FV, Alves A, Pinto JE, Godoy M, Brasil PE, Bozza FA, Salluh JI, Soares M, Krinsley J, Kang G, Perry J, Hines H, Wilkinson KM, Tordoff C, Sloan B, Bellamy MC, Moreira E, Verga F, Barbato M, Burghi G, Soares M, Silva UV, Azevedo LC, Torelly AP, Kahn JM, Angus DC, Knibel MF, Brasil PE, Bozza FA, Salluh JI, Velasco MB, Dalcomune DM, Marshall R, Gilpin T, Tridente A, Raithatha A, Mota D, Loureiro B, Dias J, Afonso O, Coelho F, Martins A, Faria F, Al-Dorzi H, Al Orainni H, AlEid F, Tlaygeh H, Itani A, Hejazi A, Arabi Y, Gaudry S, Messika J, Ricard JD, Guillo S, Pasquet B, Dubief E, Dreyfuss D, Tubach F, Battle C, James K, Temblett P, Davies L, Battle C, Lynch C, Pereira S, Cavaco S, Fernandes J, Moreira I, Almeida E, Seabra Pereira F, Malheiro M, Cardoso F, Aragão I, Cardoso 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Uyar M, Shirazy M, Fayed A, Gupta S, Kaushal A, Dewan S, Varma A, Ghosh E, Yang L, Eshelman L, Lord B, Carlson E, Helme E, Broderick R, Hadfield S, Loveridge R, Ramos J, Forte D, Yang F, Hou P, Dudziak J, Feeney J, Wilkinson K, Bauchmuller K, Shuker K, Faulds M, Raithatha A, Bryden D, England L, Bolton N, Tridente A, Bauchmuller K, Shuker K, Tridente A, Faulds M, Matheson A, Gaynor J, Bryden D, ᅟ SSYHRC, Ramos J, Peroni B, Daglius-Dias R, Miranda L, Cohen C, Carvalho C, Velasco I, Forte D, Kelly JM, Neill A, Rubenfeld G, Masson N, Min A, Boezeman E, Hofhuis J, Hovingh A, De Vries R, Spronk P, Cabral-Campello G, Aragão I, Cardoso T, Van Mol M, Nijkamp M, Kompanje E, Ostrowski P, Omar A, Kiss K, Köves B, Csernus V, Molnár Z, Hoydonckx Y, Vanwing S, Stessel B, Van Assche A, Jamaer L, Dubois J, Medo V, Galvez R, Miranda JP, Stone C, Wigmore T, Arunan Y, Wheeler A, Bauchmuller K, Bryden D, Wong Y, Poi C, Gu C, Molmy P, Van Grunderbeeck N, Nigeon O, Lemyze M, Thevenin D, Mallat J, Ramos J, Correa M, Carvalho RT, Forte D, Fernandez A, McBride C, Koonthalloor E, Walsh C, Webber A, Ashe M, Smith K, Jeanrenaud P, Marudi A, Baroni S, Ragusa F, Bertellini E, Volakli EA, Chochliourou E, Dimitriadou M, Violaki A, Mantzafleri P, Samkinidou E, Vrani O, Arbouti A, Varsami T, Sdougka M, Bollen JA, Van Smaalen TC, De Jongh WC, Ten Hoopen MM, Ysebaert D, Van Heurn LW, Van Mook WN, Sim K, Fuller A, Roze des Ordons A, Couillard P, Doig C, Van Keer RV, Deschepper RD, Francke AF, Huyghens LH, Bilsen JB, Nyamaizi B, Dalrymple C, Molokhia A, Dobru A, Marrinan E, Ankuli A, Molokhia A, McPeake J, Struthers R, Crawford R, Devine H, Mactavish P, Quasim T, Morelli P, Degiovanangelo M, Lemos F, MArtinez V, Verga F, Cabrera J, Burghi G, Rutten A, Van Ieperen S, De Geer S, Van Vugt M, Der Kinderen E, Giannini A, Miccinesi G, Marchesi T, Prandi E. Erratum to: 36th International Symposium on Intensive Care and Emergency Medicine: Brussels, Belgium. 15-18 March 2016

[This corrects the article DOI: 10.1186/s13054-016-1208-6.].

Two-Proton Radioactivity of ^{67}Kr

In an experiment with the BigRIPS separator at the RIKEN Nishina Center, we observed two-proton (2p) emission from ^{67}Kr. At the same time, no evidence for 2p emission of ^{59}Ge and ^{63}Se, two other potential candidates for this exotic radioactivity, could be observed. This observation is in line with Q value predictions which pointed to ^{67}Kr as being the best new candidate among the three for two-proton radioactivity. ^{67}Kr is only the fourth 2p ground-state emitter to be observed with a half-life of the order of a few milliseconds. The decay energy was determined to be 1690(17) keV, the 2p emission branching ratio is 37(14)%, and the half-life of ^{67}Kr is 7.4(30) ms.

Distribution of Water, Fat, and Metals in Normal Liver and in Liver Metastases Influencing Attenuation on Computed Tomography

The quantity of water, lipid and some metals was measured in autopsy specimens of 8 normal livers, 9 livers with fatty change, and in 12 livers with metastases of various origins. These parameters contribute to the CT number measured in the liver. Water played a major role in demonstration of liver metastases as a low-density area on CT. Other contributory factors include iron, magnesium and zinc. Lipid and calcium had no influence in this respect. Heavy accumulation of calcium in a metastatic lesion gives a high-density area on CT. However, even when a metastatic lesion was perceived on CT as a low-density area, the calcium content of the lesion was not always lower than that of the non-tumour region.

The Endoscopic Morphological Features of Congenital Posterior Urethral Obstructions in Boys with Refractory Daytime Urinary Incontinence and Nocturnal Enuresis

Purpose This study aims to evaluate the endoscopic morphological features of congenital posterior urethral obstructions in boys with refractory daytime urinary incontinence and/or nocturnal enuresis. Patients and Methods A total of 54 consecutive patients underwent endoscopy and were diagnosed with a posterior urethral valve (PUV) (types 1-4). PUV type 1 was classified as severe, moderate, or mild. A transurethral incision (TUI) was mainly performed for anterior wall lesions of the PUV. Voiding cystourethrography and pressure flow studies (PFS) were performed before and 3 to 4 months after TUI. Clinical symptoms were evaluated 6 months after TUI, and outcomes were assessed according to PFS waveform pattern groups (synergic pattern [SP] and dyssynergic pattern [DP]). Results All patients had PUV type 1 and/or 3 (i.e., n = 34 type 1, 7 type 3, and 13 types 1 and 3). There were severe (n = 1), moderate (n = 21), and mild (n = 25) cases of PUV type 1. According to PFS, SP and DP were present in 43 and 11 patients, respectively. TUI was effective in the SP group and symptoms improved in 77.4 and 69.3% of patients with daytime incontinence and nocturnal enuresis, respectively. Almost no effect was observed in the DP group. A significant decrease in the detrusor pressure was observed at maximum flow rate using PFS in the SP group. Conclusions PUV type 1 encompassed lesions with a spectrum of obstructions ranging from severe to mild, with mild types whose main obstructive lesion existed at the anterior wall of urethra occurring most frequently in boys with refractory daytime urinary incontinence and/or nocturnal enuresis.

New Isotopes and Proton Emitters-Crossing the Drip Line in the Vicinity of ^{100}Sn

Several new isotopes, ^{96}In, ^{94}Cd, ^{92}Ag, and ^{90}Pd, have been identified at the RIKEN Nishina Center. The study of proton drip-line nuclei in the vicinity of ^{100}Sn led to the discovery of new proton emitters ^{93}Ag and ^{89}Rh with half-lives in the submicrosecond range. The systematics of the half-lives of odd-Z nuclei with T_{z}=-1/2 toward ^{99}Sn shows a stabilizing effect of the Z=50 shell closure. Production cross sections for nuclei in the vicinity of ^{100}Sn measured at different energies and target thicknesses were compared to the cross sections calculated by epax taking into account contributions of secondary reactions in the primary target.

Nucleus ^{26}O: A Barely Unbound System beyond the Drip Line

The unbound nucleus ^{26}O has been investigated using invariant-mass spectroscopy following one-proton removal reaction from a ^{27}F beam at 201  MeV/nucleon. The decay products, ^{24}O and two neutrons, were detected in coincidence using the newly commissioned SAMURAI spectrometer at the RIKEN Radioactive Isotope Beam Factory. The ^{26}O ground-state resonance was found to lie only 18±3(stat)±4(syst)  keV above threshold. In addition, a higher lying level, which is most likely the first 2^{+} state, was observed for the first time at 1.28_{-0.08}^{+0.11}  MeV above threshold. Comparison with theoretical predictions suggests that three-nucleon forces, pf-shell intruder configurations, and the continuum are key elements to understanding the structure of the most neutron-rich oxygen isotopes beyond the drip line.

Long-Term Outcome of Low Scrotal Approach Orchiopexy without Ligation of the Processus Vaginalis

PURPOSE

We performed low scrotal approach orchiopexy in patients with prescrotal cryptorchidism. The processus vaginalis was not ligated if it was not widely patent. We retrospectively evaluated the long-term outcomes of low scrotal approach orchiopexy without processus vaginalis ligation.

MATERIALS AND METHODS

A total of 137 patients (227 testes) were diagnosed with prescrotal cryptorchidism between October 2009 and April 2014. All patients underwent low scrotal approach orchiopexy. Mean age at surgery was 34.9 months. The processus vaginalis was deemed to be not widely patent when a sound could not be passed into the abdominal cavity through the internal inguinal ring, and the processus vaginalis was not ligated in such cases.

RESULTS

Intraoperative findings revealed that the processus vaginalis was widely patent in 10 testes and was not widely patent in 217. A widely patent processus vaginalis was closed via scrotal approach in 5 testes, while an inguinal approach was necessary in 5. Median followup was 44 months (range 20 to 73). Postoperative complications included reascending testis in 1 case where an inguinal approach was necessary. No patient manifested testicular atrophy or inguinal hernia.

CONCLUSIONS

Low scrotal approach orchiopexy is a useful and safe procedure for treating patients with prescrotal cryptorchidism. Ligation is unnecessary when the processus vaginalis is not widely patent.

Candidate Resonant Tetraneutron State Populated by the ^{4}He(^{8}He,^{8}Be) Reaction

A candidate resonant tetraneutron state is found in the missing-mass spectrum obtained in the double-charge-exchange reaction ^{4}He(^{8}He,^{8}Be) at 186  MeV/u. The energy of the state is 0.83±0.65(stat)±1.25(syst)  MeV above the threshold of four-neutron decay with a significance level of 4.9σ. Utilizing the large positive Q value of the (^{8}He,^{8}Be) reaction, an almost recoilless condition of the four-neutron system was achieved so as to obtain a weakly interacting four-neutron system efficiently.

Acute Kidney Injury Associated with Renal Cell Carcinoma Complicated by Renal Vein and Inferior Vena Cava Involvement

Acute kidney injury (AKI) is caused by diverse pathologies, although it may occasionally result from concurrent renal efflux disturbances. We herein describe a case of AKI in a patient complicated by renal cell carcinoma (RCC) with renal vein and inferior vena cava (IVC) involvement. A neoplastic thrombus which disrupted the blood flow in the renal vein appeared to play a role in the rapid decline in the renal function. Such a scenario has rarely been mentioned in the previous literature describing the cases of RCC complicated by AKI. Concerns regarding the diagnostic and therapeutic strategies for RCC are also discussed.