Sacral dimple is an indentation that is present at birth, in the skin on the lower back. It is often found just above the crease between the buttocks. Sacral dimples are mostly harmless and also don’t need any treatment.
When they are accompanied by a nearby skin tag, tuft of hair some types of skin discoloration, they are sometimes associated with a serious underlying abnormality of the spinal cord or spine.
An imaging test may be done, and if an abnormality is found, treatment will depend on the underlying cause.
Causes Of Sacral Dimples
There are no known causes of sacral dimples. It is a congenital condition. This means that it’s also present at birth.
Symptoms Of A Sacral Dimple
A sacral dimple is made up of a “pit,” or an indentation. Found in the skin on the lower back, above the crease between the buttocks.
Complications Of Sacral Dimples
Sacral dimples are rarely associated with a serious underlying abnormality of the spine or spinal cord. Examples include:
Tethered Cord Syndrome. The spinal cord in a normal case hangs freely within the spinal canal. Tethered cord syndrome occurs when the tissues that are attached to the spinal cord restricts its movement.
Signs and symptoms also include:
- Bowel incontinence.
- Weakness in the legs.
- Numbness in the bladder.
Risks of this spinal problem also raise the sacral dimple that comes with a skin tag, a nearby tuft or some type of skin discoloration.
Spina Bifida. Spina bifida occulta is a mild form of this disorder. It happens when the spine doesn’t close well around the spinal cord. The cord also remains within the spinal canal. In some cases, spina bifida occulta causes no symptoms.
Tests And Diagnosis
Sacral dimples newborn is the type that is found at birth. It is also evident during an infant’s first physical exam.
If the dimple is very large or comes with a skin tag, nearby tuft of hair or some type of skin discoloration, your doctor may advise an imaging test to rule out any spinal cord problems.
The tests may include:
- Magnetic resonance imaging (MRI). This test uses radio waves and a strong magnetic field. This creates cross-sectional images of the body.
- Ultrasound. This is a non-invasive procedure. It also uses high-frequency sound waves to produce images of structures found in the body.
Treatments and drugs
Treatment and drug for a simple sacral dimple are not required.