Immune thrombotic thrombocytopenic purpura (iTTP) is a rare coagulopathic disorder characterized by immune-mediated thrombocytopenia and microangiopathic hemolytic anemia, that can cause life-threatening thrombosis. Coauthor Allyson M. Pishko, MD, MSCE, of the University of Pennsylvania joins JAMA Associate Editor David Simel, MD, MHS, to discuss the recent review of iTTP published in JAMA.

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The human microbiome appears to influence risk for development and progression of cancer and response to treatment. Author Jennifer Wargo, MD, University of Texas M.D. Anderson Cancer Center, discusses basic science and clinical evidence regarding the human microbiome and cancer risk with JAMA Deputy Editor Mary McGrae McDermott, MD.

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• The Microbiome and Cancer

Endometriosis, a common cause of pelvic pain, affects approximately 10% of reproductive-age females. Author Sawsan As-Sanie, MD, MPH, University of Michigan, discusses the epidemiology, pathophysiology, diagnosis, and treatment of endometriosis with JAMA Senior Editor Karen E. Lasser, MD, MPH.

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What is the single most important thing to recognize when communicating with families about vaccines? Author Sean T. O’Leary, MD, MPH, of the University of Colorado Anschutz Medical Campus and Children’s Hospital Colorado joins JAMA Senior Editor Anne Cappola, MD, ScM, to discuss evidence-based approaches for discussions with parents about vaccines.

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Non-cystic fibrosis (CF) bronchiectasis, which affects approximately a half million people in the US, is a chronic lung condition that involves permanent bronchial dilation and inflammation; it is characterized by a productive cough and recurrent exacerbations. Author Alan F. Barker, MD, of Oregon Health and Science University joins JAMA Deputy Editor Kristin Walter, MD, MS, to discuss non-CF bronchiectasis.

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A JAMA Clinical Guidelines Synopsis summarizes the Endocrine Society’s most recent recommendations on vitamin D supplementation for disease prevention. Author Sherri-Ann M. Burnett-Bowie, MD, MPH, discusses this and more with JAMA Associate Editor David L. Simel, MD, MHS.

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What are 3 fundamental communication skills needed when discussing surgery with patients? Author Lauren J. Taylor, MD, of the Central Virginia VA Health Care System discusses this and more with JAMA Senior Editor Anne Cappola, MD, ScM.

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Small cell lung cancer (SCLC) is a smoking-related malignancy that presents at an advanced stage in 70% of patients. Author Anne C. Chiang, MD, PhD, of the Yale University School of Medicine joins JAMA Senior Editor Karen Lasser, MD, MPH, to discuss the epidemiology, treatment, and prognosis of SCLC.

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• Small Cell Lung Cancer