Congenital vascular malformation in the true pelvis
Prostatic "cysts" detected on ultrasound.
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Bilateral dilated, contorted vessels in the internal iliac territory with flow-related black blood phenomena, allowing differentiation from cysts or lymphoceles. Arteriovenous shunting was later excluded by conventional DSA (not shown).
This was classified as a combined venous (predominantly) and capillary malformation based on the Hamburg classification.