Type Glandular tissue Nipple Areola Fat tissue Hair patch 1 yes yes yes yes 2 yes yes 3 yes yes 4 yes 5 ("pseudomamma") yes yes yes 6 ("polythelia") yes 7 ("polythelia areolaris") yes 8 ("polythelia pilosa") yes Polythelia refers to the presence of an additional nipple alone while polymastia denotes the much rarer presence of additional mammary glands. Although usually presenting on the milk line, pseudomamma can appear as far away as the foot. A possible relationship with mitral valve prolapse has been proposed.
Supernumerary nipple
Inverted nipple
Cracked nipple
Accessory breast
Bifid penis
Genital wart
Genu recurvatum
Webbed penis