acardius anceps

a·car·di·us an·'ceps

an acardiac fetus with partly developed head and deformed face, trunk, and limbs.
References in periodicals archive ?
In Acardius Anceps twin, the most developed type, rudimentary cranial structures with otherwise persistent trunk, limbs and organs noted.
La cabeza puede estar ausente (acardius acephalus) o pobremente diferenciada en relacion con el cuerpo (acardius anceps); en otras ocasiones, la cabeza es el unico segmento desarrollado (acardius acomus).
Skeletal deformities of acardius anceps. The gross and imaging features.