Case Presentation: A 37-year-old woman with significant history of intravenous substance abuse, six-year-old mechanical mitral valve replaced for mitral regurgitation and non-adherence to medications presented with shortness of breath and fever (103 F). She was hypotensive (84/64mmHg) and tachycardic (130/minutes). She was intubated and mechanically ventilated for acute respiratory failure. Lab results were remarkable for [...]

Case Presentation: We present a case of a 46-year-old Hispanic male with history of B-cell Acute Lymphocytic Leukemia, Philadelphia chromosome negative and CD20 positive, on remission, receiving maintenance chemotherapy (6-mercaptopurine, vincristine, methotrexate, and prednisone), with his last infusion given 2 weeks prior to admission. His symptoms included 3-day history of severe dyspnea on exertion, pleuritic [...]