We studied 68 Asian Indians from South India with supernumerary nipple (SN)
and 49 age- and sex-matched controls without SN for evidence of mitral val
ve prolapse (MVP) and associated features. We found that MVP and its forme
fruste were more common in the SN group (odds ratio 6.0, 95% confidence int
ervals 2.16 to 16.63), indicating an association of SN with MVP.