Deuel's halo sign

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An X-ray finding (of historical significance and is no longer used in practice these days)in intrauterine death which can be demonstrated after 3 days following fetal death . The usual zone of reduced density visible around the head of relatively mature fetus before delivery appears separate from the cranium . This halo has a soft tissue density structures.