The vast majority of spinal arteriovenous shunts are dural fistulas in men aged 50 and above.  However, there are rare cases of multiple fistulas of various types. Many have underlying genetic conditions we know or are learning about.  Usually, they do not fit the above demographic either.  Here is a person (age and gender are withheld on neuroangio for confidentiality reasons), presenting with sudden onset neck and head pain.

Below are images only.  Some are tagged by helpful arrows.  The same case, with explanations, is available as well – link withheld so far