What’s your diagnosis based on these ultrasound images of a 16-week pregnancy?

This patient had a left tubal ectopic pregnancy that later ruptured, with subsequent implantation of the pregnancy in the left hemi-pelvis. The characteristic features of an abdominal ectopic pregnancy include the absence of a gestational sac within the uterine cavity and the presence of what can be an advanced pregnancy outside the confines of the uterus. Note the absence of myometrium between the fetus and the urinary bladder.

Pregnancy and Birth

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Challenge your diagnostic skills: What’s odd about this 16-week pregnancy?