Abnormal sacrum morphology

What it means

An abnormality of the sacral bone.

The sacrum is the large, roughly triangular bone at the base of the verterbal column that is formed by fusion of the five sacral vertebrae S1 to S5.

Rare diseases that can present with this17

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Abnormality of the sacrum