XXXX in an Adolescent with Primary @entity299 .

@entity1 @entity712 @entity1353 @entity3876 @entity4617 @entity358 @entity1576 @entity299
We report a case of progressive @entity1576 secondary to primary @entity299 masquerading as @entity358 . An 18-year-old female presented to our hospital emergency department with progressive cough, @entity1353 , and hemoptysis. She was treated for primary @entity358 without improvement and had @entity1576 with endotracheal intubation by the third hospital day. An "intermediate" plasma brain natriuretic protein ( @entity3876 ) of 216   pg/mL did not raise concerns about a @entity712 diagnosis and may have delayed the correct diagnosis. Computed tomography of the chest with intravenous contrast was performed on the fifth hospital day and revealed a cardiac mass. A transthoracic echocardiogram confirmed a large left atrial mass that was obstructing mitral inflow. She was transferred to a tertiary center for emergency cardiac surgery. Primary @entity4617 are a rare and treatable cause of @entity712 in adolescent and young adult @entity1 . Presentation can be confused with @entity358 and must be suspected early. Plasma @entity3876 cutoff levels used in the adult population should not be extrapolated to adolescents, as levels, both normal and abnormal, are significantly lower in this group of @entity1 .
