Detection of B-mode polarization in the cosmic microwave background with data from the South Pole Telescope.

Gravitational lensing of the cosmic microwave background generates a curl pattern in the observed polarization. This "B-mode" signal provides a measure of the projected mass distribution over the entire observable Universe and also acts as a contaminant for the measurement of primordial gravity-wave signals. In this Letter we present the first detection of gravitational lensing B modes, using first-season data from the polarization-sensitive receiver on the South Pole Telescope (SPTpol). We construct a template for the lensing B-mode signal by combining E-mode polarization measured by SPTpol with estimates of the lensing potential from a Herschel-SPIRE map of the cosmic infrared background. We compare this template to the B modes measured directly by SPTpol, finding a nonzero correlation at 7.7σ significance. The correlation has an amplitude and scale dependence consistent with theoretical expectations, is robust with respect to analysis choices, and constitutes the first measurement of a powerful cosmological observable.

Dusty starburst galaxies in the early Universe as revealed by gravitational lensing.

In the past decade, our understanding of galaxy evolution has been revolutionized by the discovery that luminous, dusty starburst galaxies were 1,000 times more abundant in the early Universe than at present. It has, however, been difficult to measure the complete redshift distribution of these objects, especially at the highest redshifts (z > 4). Here we report a redshift survey at a wavelength of three millimetres, targeting carbon monoxide line emission from the star-forming molecular gas in the direction of extraordinarily bright millimetre-wave-selected sources. High-resolution imaging demonstrates that these sources are strongly gravitationally lensed by foreground galaxies. We detect spectral lines in 23 out of 26 sources and multiple lines in 12 of those 23 sources, from which we obtain robust, unambiguous redshifts. At least 10 of the sources are found to lie at z > 4, indicating that the fraction of dusty starburst galaxies at high redshifts is greater than previously thought. Models of lens geometries in the sample indicate that the background objects are ultra-luminous infrared galaxies, powered by extreme bursts of star formation.

Multi-organ resections for colorectal cancer: analysis of potential factors with role in the occurrence of postoperative complications and deaths.

AIM: Multi-organ resection for colorectal malignancy is a topic of interest nowadays as it raises the issue of benefits versus increased morbidity. This study aims to identify factors that may influence the development of postoperative complications and death following multivisceral resection. METHODS: The study included 107 patients hospitalized in the Surgical Clinic III of Cluj-Napoca, who underwent multivisceral resections for colorectal cancer pathology. This is a retrospective study covering the period between 2006 and 2010. This study compares the morbidity and mortality following multi-organ resections for locally advanced colorectal cancer, with results in patients with uncomplicated colorectal resections. The study also highlights the impact that certain factors have on the development of postoperative complications. RESULTS: This study shows a higher incidence of death and postoperative complications in the case of multiorgan resections. The differences were found to be statistically significant as follows: postoperative complications: 26% after multiorgan resection and 14% after uncomplicated resection respectively (p = 0.001); postoperative death: 11% after multi-organ resection and 3% after uncomplicated resection respectively (p < 0.001). The factors that have influenced in a negative way the postoperative evolution of the patients were: diabetes, personal history of malignant disease, associated heart disease, major abdominal surgery prior enrolling, the number of resected organs and increased intraoperative blood loss (over 500 ml). CONCLUSION: In cases of locally advanced colorectal neoplasm, multiorgan resection should become the standard indication, as it offers patients their only chance of survival, comparable to that obtained in less advanced stages of the disease. This indication is underlined by the high resecability rate (R0) accomplished in our service. Preoperative compensation of the associated pathologies, the surgery performed by experienced teams, as well as providing an adequate intensive care are required to reduce the postoperative risks.

[Morbidity and mortality in gastric cancer surgery--analysis of 468 cases with gastric adenocarcinoma]. / Morbiditate si mortalitate în chirurgia cancerului gastric--analiza a 468 cazuri de adenocarcinom gastric.

The aim of this study is to evaluate the morbidity and mortality in the surgical treatment of gastric cancer and the factors that could influencing them. We made a retrospective analysis of a group of 468 patients with gastric adenocarcinoma which have been operated in the 3RD Surgical Clinic-Cluj Napoca--01.01.1998-31.12.2003. We analyzed parameters related to patient, pTNM stage and type of treatment. Morbidity was significantly higher in these circumstances: elder patients, cases with lower serum levels of hemoglobin and total proteins, after Billroth II procedures; we found no significant differences of morbidity depending on gender, pTNM stage, type of intervention: simple or multiorgan resection, subtotal or total gastrectomy, radical or palliative procedure or only exploratory laparotomy, presence or absence of splenectomy or caudal pancreatectomy, D1 or D2 lymphadenectomy (in radical procedures), palliative resection or gastrojejunal bypass. Elder patients and male patients have had a mortality significantly higher; we found no significant differences of mortality depending on serum levels of hemoglobin and total proteins, pTNM stage, type of intervention: simple or multiorgan resection, subtotal or total gastrectomy, radical or palliative procedure or only exploratory laparotomy, presence or absence of splenectomy or caudal pancreatectomy, D1 or D2 lymphadenectomy (in radical procedures), type of restoring of the digestive continuity after subtotal gastrectomy, palliative resection or gastrojejunal bypass.

[Long-term prognostic value of positive peritoneal washing in colon cancer]. / Cancerul de colon: valoarea prognostica pe termen lung al lavajului peritoneal pozitiv.

UNLABELLED: We examined the prognostic value of free malignant cells in the peritoneal cavity of patients with colon adenocarcinoma. In 1996-1999, 88 patients underwent peritoneal washing with cytologic analysis immediately before elective colon resection for adenocarcinoma with no evidence of peritoneal metastases. Peritoneal washing fluid was collected before abdominal exploration centrifuged immediately and stained with the May-Grünwald-Giemsa and Harris-Shorr methods. Malignancy was defined as recommended by Papanicolaou. Free malignant cells in peritoneal fluid were found in 25 of 88 (28%) patients (Dukes A 0, of 11, Dukes B 10 of 31, Dukes C 11 of 37, Dukes D 4 of 9). The positive rate was 24 of 75 (32%) among patients with tumors involving the serous layer and 1 of 13 (8%) among the others (p = 0.00989). Positive peritoneal washing was not significantly associated with survival in multivariate analysis. CONCLUSION: The presence of free malignant cells in the peritoneal cavity of patients with colon cancer provided no further prognostic information relative to the Dukes classification in this study. The 5 years survival rates were 48% among patients with positive and negative peritoneal washing respectively (p = 0.09).