Placenta previa: Avoiding false-negative diagnoses

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Abstract
A retrospective analysis of 102 patients with clinically suspected placenta previa revealed that ten women (10%) were correctly diagnosed as having placenta previa, while two women (2%) had false‐positive diagnoses. Three of the ten women who were correctly diagnosed as having placenta previa had scans that could easily have been misinterpreted as normal. Because a false‐negative diagnosis of placenta previa is clinically much more serious than a false‐positive diagnosis, these cases are elaborated upon. Recognition of a laterally positioned placenta previa and observation of blood in the region of the internal cervical os should minimize false‐negative diagnostic errors.

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