xiphopagus

Xiphopagus: Two bodies fused in the xiphoid cartilage, which is approximately from the navel to the lower breastbone.

He studied in France with Pierre and Marie Curie and performed the first radiograph in Brazil, which was on the xiphopagus case for Brazilian surgeon Eduardo Chapot Prévost.

Comelli was a regular contributor to the Fakes Forgeries Experts journal of the AIEP, and in 2002 wrote a masterful history of the ownership of the Xiphopagus Triplet (The "Pack Strip") of Brazil for The London Philatelist.