“…The differential diagnosis has to be considered with placental anomalies [1,2] (avillous spaces or 'placental lakes' [3,4], true placental cyst or cytotrophoblast cyst [5], circumvallate placenta, subchorionic hematomas or thrombi [6][7][8], chorangioma [6], Breus' mole [7], and infarction [9,10]), a cord cyst, and fetal anomalies ('vanishing twin', meningocele). Exact sonographic localization, shape and echogenicity of the lesion over time [1] and Doppler flow examination enable differentiation between a subamniotic hematoma and other lesions.…”