The above link as the most important point for ANY presentation (in business, medicine, etc): know your audience.
For example, when presenting a patient to a surgeon, we are most concerned with Is and Os, fevers, pain control, wound appearance (if appropriate), and the appropriate system exam (ie, in a patient with diverticulitis, what is the abdominal exam). We don't care so much about the neuro exam (unless there is something acutely wrong which needs a consult) or irrelevant social history.
OTOH, to use an example of my own last week (and the student in question will probably be embarassed to read this
); while working on medical oncology, I really don't want to hear details about the wound, only that she's x days post-op, doing well and then details about the pathology (which may guide my treatment plan).
So, know your audience, know the system of concern (that should be your focus), don't belabor points (or you'll get taken down a path in which you won't know the answer) and like for any presentation, have a wrap up summary and plan. It is NOT okay to say, "looks good from door" (unless you are on an Ortho rotation).