20 research outputs found

    Measurement of the branching fraction for the decay BK(892)+B \to K^{\ast}(892)\ell^+\ell^- at Belle II

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    We report a measurement of the branching fraction of BK(892)+B \to K^{\ast}(892)\ell^+\ell^- decays, where +=μ+μ\ell^+\ell^- = \mu^+\mu^- or e+ee^+e^-, using electron-positron collisions recorded at an energy at or near the Υ(4S)\Upsilon(4S) mass and corresponding to an integrated luminosity of 189189 fb1^{-1}. The data was collected during 2019--2021 by the Belle II experiment at the SuperKEKB e+ee^{+}e^{-} asymmetric-energy collider. We reconstruct K(892)K^{\ast}(892) candidates in the K+πK^+\pi^-, KS0π+K_{S}^{0}\pi^+, and K+π0K^+\pi^0 final states. The signal yields with statistical uncertainties are 22±622\pm 6, 18±618 \pm 6, and 38±938 \pm 9 for the decays BK(892)μ+μB \to K^{\ast}(892)\mu^+\mu^-, BK(892)e+eB \to K^{\ast}(892)e^+e^-, and BK(892)+B \to K^{\ast}(892)\ell^+\ell^-, respectively. We measure the branching fractions of these decays for the entire range of the dilepton mass, excluding the very low mass region to suppress the BK(892)γ(e+e)B \to K^{\ast}(892)\gamma(\to e^+e^-) background and regions compatible with decays of charmonium resonances, to be \begin{equation} {\cal B}(B \to K^{\ast}(892)\mu^+\mu^-) = (1.19 \pm 0.31 ^{+0.08}_{-0.07}) \times 10^{-6}, {\cal B}(B \to K^{\ast}(892)e^+e^-) = (1.42 \pm 0.48 \pm 0.09)\times 10^{-6}, {\cal B}(B \to K^{\ast}(892)\ell^+\ell^-) = (1.25 \pm 0.30 ^{+0.08}_{-0.07}) \times 10^{-6}, \end{equation} where the first and second uncertainties are statistical and systematic, respectively. These results, limited by sample size, are the first measurements of BK(892)+B \to K^{\ast}(892)\ell^+\ell^- branching fractions from the Belle II experiment

    Neoadjuvant sintilimab combined with chemotherapy in resectable locally advanced non-small cell lung cancer: case series and literature review

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    Abstract Background In recent years, neoadjuvant immunotherapy with chemotherapy has shown increasing promise for locally advanced non-small cell lung cancer (NSCLC). However, to establish its clinical efficacy and safety, it is imperative to amass more real-world clinical data. This retrospective study aims to assess the safety and effectiveness of combing sintilimab, a PD-1 inhibitor, with chemotherapy as a neoadjuvant treatment modality in patients diagnosed with potentially resectable NSCLC. Methods We retrospectively reviewed patients with stage II-III NSCLC receiving neoadjuvant chemoimmunotherapy in Sichuan Cancer Hospital between February 2021 and February 2023. Sintilimab injection (intravenously,200 mg, iv, d1, q3w) and platinum-based chemotherapy were administered intravenously every 3 weeks, with radical lung cancer resection planned approximately 4–11 weeks after the last dose. The primary endpoint of the study was pathologic complete response (pCR). The secondary endpoints were objective response rate (ORR), and safety. Result Thirteen patients were enrolled, they were mostly diagnosed with stage III NSCLC (IIB 15.4% IIIA 38.5%; IIIB 46.2%). Most of them had pathologically confirmed squamous cell carcinoma (69.2%). All patients received sintilimab combined with platinum-based chemotherapy for 2 to 4 cycles. Notably, none of the patients necessitated a reduction in initial dosages or treatment postponement due to intolerable adverse events. Then, all of them underwent surgical operation. Impressively, nine patients (69.2%) achieved a pathologic complete response. The objective response rate (ORR) stood at 46.15%. Nine patients experienced neoadjuvant treatment-related adverse events (TRAEs), with only one patient (7.6%) encountering a grade 4 neoadjuvant TRAE. Conclusion Therefore, the current study suggested that neoadjuvant sintilimab plus platinum-based chemotherapy can be a safe approach in increasing the efficiency of treatment and hopefully improving the prognosis of patients with potentially resectable locally advanced NSCLC

    The Role of Interventional Radiology in the Diagnosis and Treatment of Pulmonary Arteriovenous Malformations

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    Pulmonary arteriovenous malformations (PAVMs) are uncommon, predominantly congenital direct fistulous connections between the pulmonary arteries and pulmonary veins, resulting in a right to left shunt. Patients with PAVMs are usually asymptomatic with lesions detected incidentally when radiological imaging is performed for other indications. In this review, we discuss the classification and radiological features of PAVMs as well as their treatment and follow-up options, with a particular focus on percutaneous endovascular techniques and the evolution of the available equipment for treatment
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