Sacral dimple

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A sacral dimple (also termed pilonidal dimple or spinal dimple) is a small depression in the skin, located just above the buttocks. The name comes from the sacrum, the bone at the end of the spine, over which the dimples are found. Sacral dimples can be discovered during routine exams of newborn children (neonate). A sacral dimple on a neonate is defined as a midline dimple less than 5 mm in diameter and no further than 2.5 cm from the anus without associated visible drainage or hairy tuft. Sacral dimples are common benign congenital anomalies found in up to 4% of the population, Other common benign congenital anomalies include supernumerary digits, third nipples and natal teeth. Most sacral dimple cases are minor and do not relate to any underlying medical problem, but some can result from disease, notably spina bifida. If so, this is usually the spina bifida occulta form, which is the least serious kind. Simple dimples are typically small, measuring less than 5 mm in size. They are positioned...

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