A sacral dimple (also termed pilonidal dimple or spinal dimple) is a small depression in the skin, located just above the . The name comes from the sacrum, the bone at the end of the spine, over which the dimples are found.
Sacral dimples are rare, occurring in up to 4% of the population. The majority of these dimples are minor and do not represent any underlying disease; however, the minority may be a sign of disease, notably spina bifida. Even so, this is usually the spina bifida occulta form, which is the least serious kind.
Sacral dimples are usually spotted in post-natal checks by a pediatrician, who will check:
Additionally, this can be indicative of a possible kidney problem that can be checked with an ultrasound.