halo sign


ha·lo sign

elevation of the subcutaneous fat layer over the fetal skull in a dead or dying fetus; said to be the most common radiologic sign of fetal death.
A vague radiolucency imparted by the dense fibrous capsule of an ovarian dermoid cyst—mature teratoma, separating different sharply circumscribed tissue densities, often recognised by plain films of the lower abdomen

ha·lo sign

(hā'lō sīn) Elevation of the subcutaneous fat layer over the fetal skull in a dead or dying fetus; said to be the most common radiologic sign of fetal death.