Sacral dimple

A sacral dimple (also termed pilonidal dimple or spinal dimple)[1] is a small depression in the skin, located just above the buttocks.[2][3][4][5] 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.[1][5] Most of these cases are minor and do not relate to any underlying medical problem,[1][3][5] but they can result from disease, notably spina bifida.[3][5] If so, this is usually the spina bifida occulta form, which is the least serious kind.[3] A sacral dimple could also indicate a kidney problem of a kind that can be checked with an ultrasound.

Sacral dimples are often spotted in post-natal checks by pediatricians,[3][5] who can check:

  • whether the floor of the dimple is covered with skin;
  • whether there is a tuft of hair in the dimple;
  • whether there are potentially related problems such as weak lower limbs;
  • the distance from the buttocks to the dimple (closer is better).

Classification

Sacral dimples were selected for one study by the ICD9CM code of 685.1.[3]

See also

References
  1. Flannigan, Christopher, ed. (2011). A practical guide to managing paediatric problems on the postnatal wards. Oxford: Radcliffe Pub. pp. 43, 44. ISBN 9781846195068.
  2. "Sacral Dimple". Cleveland Clinic. 2018-04-19. Retrieved 2019-08-03.
  3. Lee, ACW; Kwong, NS; Wong, YC (2007). "Management of Sacral Dimples Detected on Routine Newborn Examination: A Case Series and Review" (PDF). Hong Kong Journal of Pediatrics. 12: 93–95. Retrieved 2019-08-03.
  4. "Sacral Dimple". Mayo Clinic. 2018-09-13. Retrieved 2019-08-03.
  5. Zywicke, Holly A.; Rozzelle, Curtis J. (2011). "Sacral Dimples". Pediatrics in Review. 32 (3): 109–113. doi:10.1542/pir.32-3-109. PMID 21364014. S2CID 207170950.
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