Unequal conjoined twins in which the smaller, incomplete parasite is attached to the buttock of the larger autosite. See: pygomelus, conjoined twins.
[epi- + G. pygē, buttocks]
epipygus(ep?i-pi'gus) [Gr. epi, upon, + pyge, buttocks]
A developmental anomaly in which an accessory limb is attached to the buttocks.See: pygomelus