The sigmoid sinus is a dural venous sinus that lies deep within the human head, and just below the brain. A dural sinus is a channel that lies between the dura mater, the outermost tissue covering the ...

Robert is a 39-year-old male who presented with a 5-day history of severe headaches treated initially with antibiotics for suspected sinusitis by his primary-care physician. Robert's headaches did not ...

A 46-year-old woman was transferred to an internal medicine ward after a 5-week stay in the intensive care unit, where she was treated for severe acute respiratory distress syndrome secondary to COVID ...