Perinatal gangrene of the buttock
Encyclopedia
Perinatal gangrene of the buttock is a skin condition similar to livedoid dermatitis, and is usually a complication of umbilical artery
Umbilical artery
The umbilical artery is a paired artery that is found in the abdominal and pelvic regions. In the fetus, it extends into the umbilical cord.-Umbilical arteries in the fetus:...

 catheterization, exchange transfusion, or cord injections by means of a syringe
Syringe
A syringe is a simple pump consisting of a plunger that fits tightly in a tube. The plunger can be pulled and pushed along inside a cylindrical tube , allowing the syringe to take in and expel a liquid or gas through an orifice at the open end of the tube...

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