Hypernatremia with choroid plexus hematomas and elevated CSF protein level.

A 3-month-old infant had hypernatremia, neurologic dysfunction, and an unusually high level of cerebrospinal fluid protein. The autopsy findings included cerebral edema, intravascular coagulation, and bilateral choroid plexus hematomas. Extensive destruction of the choroid plexus, in combination with diffuse intravascular coagulation may explain the much greater elevation of CSF protein than previously described with hypernatremia.