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Pitfall—focal bulge in the region of the maternal umbilicus: sagittal T2 balanced gradient-echo image demonstrates a dark band in the low uterine segment at the expected site of the caesarean-section scar (curved arrow); in addition, there is placenta percreta in the region of the cervix. The bulge in the anterior abdominal wall (arrow) could be mistaken for an area of invasion, but it is in fact a common normal finding due to separation of the rectus muscles as pregnancy progresses.
