Journal of Ultrasound in Medicine, Vol 18, Issue 1 13-16, Copyright © 1999 by American Institute of Ultrasound in Medicine
Cesarean section scar as a cause of abnormal vaginal bleeding: diagnosis by sonohysterography
A. S. Thurmond, W. J. Harvey and S. A. Smith
Imaging Department, Legacy Meridian Park Hospital, Tualatin, Oregon 97062, USA.
A previously undescribed cause of abnormal uterine bleeding is presented.
Nine of 310 women evaluated by sonohysterography for abnormal bleeding
demonstrated an 8 to 17 mm gap in the anterior lower uterine segment
myometrium at the site of prior cesarean deliveries. All women were
premenopausal and had a history of 2 to 12 days of postmenstrual spotting.
Presumably a lack of coordinated muscular contractions occurs around the
cesarean scar, allowing the defect to collect menstrual debris.
Subsequently, the debris leaches out through the cervix for several days
after the majority of menstrual flow has ceased.