Urogenital sinus, the most common appearance of the lower urogenital tract in adrenogenital syndrome. A well-developed vagina with a well-defined impression of the uterine cervix on the vaginal vault (arrow) joins the distal end of the urethra to form a long common sinus tract (urogenital sinus) that ends in the perineum at the base of a prominent phallus. Barium paste was applied on the perineum to show the distance between the vagina and perineum.
Might explain a few things. Anomalous events when I was 14. Or might not - the ultrasounds are invonclusive.