(thō'ră-kō-par'ă-sef'ă-lŭs), Unequal conjoined twins in which a rudimentary parasitic head is attached to the thorax of the autosite. See: conjoined twins. [thoraco- + G. para, beside, + kephalē, head]
thoracoparacephalus
(thō″ră-kō-păr″ă-sĕf′ă-lŭs) [″ + para, beside, + kephale, head] Thoracopagus twins in which a rudimentary head is attached to the smaller twin.