What is Rectourethral fistula?

A recto-bladder neck fistula, sometimes referred to as a rectovesical fistula, is one of the least common ARMs seen in male patients. The condition is characterized by a connection between the rectum and the bladder, which can cause urine and feces to mix and empty out of the urethra.

What causes Urachal fistula?

A urachal fistula is a congenital disorder caused by the persistence of the allantois (later, urachus), the structure that connects an embryo’s bladder to the yolk sac.

What is congenital fistula?

A congenital recto-vaginal fistula is a rare type of ARM characterized by the abnormal connection of the rectum to the vagina. This results in the potential of passing gas or feces through the vagina as it leaks through the fistula.

What is a Post op fistula?

The development of an enterocutaneous fistula (ECF) is a potentially catastrophic postoperative complication. Virtually any intra-abdominal procedure can result in an ECF, with procedures that intentionally or unintentionally damage the bowel wall carrying the greatest risk.

What are the imaging features of urachal anomalies?

The imaging features of congenital urachal anomalies (ie, patent urachus, urachal cyst, umbilical-urachal sinus, and vesicourachal diverticulum), potential complications (most importantly infection and neoplasm), and mimics will also be discussed and illustrated. ( 7 ).

What does it mean if you have perianal fistula?

In the case of perianal fistula, it is a connection between the anal canal and the skin of the perineum. Perianal fistulization is an uncommon process, with a prevalence of 0.01%, although it causes significant morbidity. It predominantly affects young males, with a male-to-female ratio of 2:1.

How is MR imaging used to evaluate perianal fistulas?

Although imaging techniques played a limited role in evaluation of perianal fistulas in the past, it is now increasingly recognized that imaging techniques, especially magnetic resonance (MR) imaging, may play a crucial role. MR imaging allows identification of infected tracks and abscesses that would otherwise remain undetected.

Why are urachus anomalies more common than previously thought?

Imaging of the Urachus: Anoma- lies, Complications, and Mimics1 Urachal anomalies are more common than previously thought, with more cases discovered incidentally, because of the increased use of cross-sectional imaging. Although an abnormal persistence of an embryologic communication between the bladder and the umbi-

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