Real human deformed sacrum medical specimen
This is an interesting item.
A real human sacrum which came with a collection of bones from a medical school.
This is an interesting example in that it shows quite distinct and severe deformity. The whole of the sacrum is twisted to the left as can be seen in the photos.
Unfortunately, the rest of the spine is no longer with this specimen as that would have been interesting to see.
There is some damage to the right sacral ala, probably as a result of the bone becoming dry and friable over time.