The first reported case of doubled penis was found on a cadaver, in Bologna, in 1609 by Wecker. It was reported as follows:
Observatio. Pene gemino visus quidam. Vidimvs Bononia in publicis dissectionibus cadauer viri qui duplicem habuit penem. Cl. v. Ioannes Iacobus Weckerus in Suis mthi communicatis Obseruationibus. The first American case was provided by Van Buren and Keyes in 1874. Bruni (1926) reviewed 15 cases and added one of his own for a total of 16 cases, which he discussed in detail. Additional cases by McLennan, by Kimura, by Seth and Peacock, and by others increased the total to 29 cases that were found in the medical literature by 1932.