GIACOMO  PORO
"The excrescence from his side resembled a human only in a few particulars"
"James Poro, the son of Paul Poro, was born at Genoa, in the year 1686, and was doomed, by one of the sports of Nature, to drag about with him a monstrous excrescence, which grew from his body, having something of the form and feature of the human kind, which possessing an independent animated nature to himself, was considered as twin brother, and was as such baptized by the name of Matthew.  This unfortunate object made a show of himself, in London, in the year 1714, and was particularly noticed by Sir Hans Sloane, who caused his portrait to be painted, which is still preserved in the British Museum."

Portraits, Memoirs, and Characters, of Remarkable Persons..., (1819)