Politelia o hipertelia es el fenómeno biológico de pezones supernumerarios, si bien sin glándula mamaria. Generalmente se encuentran en la línea mamaria que sigue a los pezones en el tórax hacia el abdomen. Si son de gran tamaño, deben extirparse. Por lo general son pequeños y se los confunde con verrugas o lunares.Normalmente, los elementos supernumerarios se hallan siguiendo el trayecto de las denominadas líneas mamarias, que discurren imaginariamente desde las axilas hasta la región inguinal

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A supernumerary nipple (also known as a third nipple, triple nipple, accessory nipple, polythelia or the related condition: polymastia) is an additional nipple occurring in mammals, including humans. Often mistaken for moles, supernumerary nipples are diagnosed in humans at a rate of approximately 1 in 18 people. The nipples appear along the two vertical "milk lines," which start in the armpit on each side, run down through the typical nipples and end at the groin. They are classified into eight levels of completeness from a simple patch of hair to a milk-bearing breast in miniature. 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.

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