Reichel and Anderson mention a living parasitic monster, the inferior trunk of one body proceeding from the pectoral region of the other.
Pare says that there was a man in Paris in 1530, quite forty years of age, who carried about a parasite without a head, which hung pendant from his belly.

This individual was exhibited and drew great crowds.
Pare appends an illustration, which is, perhaps, one of the most familiar in all teratology.

He also gives a portrait of a man who had a parasitic head proceeding from his epigastrium, and who was born in Germany the same year that peace was made with the Swiss by King Francis.

This creature lived to manhood and both heads were utilized in alimentation.

Bartholinus details a history of an individual named Lazarus-Joannes Baptista Colloredo, born in Genoa in 1617, who exhibited himself all over Europe.