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inframammary fold (IMF)
the angle of deflection where the breast tissue meets the chest wall below the breast.
in·fra·mam·ma·ry fold(IMF) (in'fră-mam'ăr-ē fōld)
A crescentic zone on the chest wall below the female breast consisting of regular arrays of collagen in the dermis and an underlying condensation of superficial fascia, imparting shape to the breast and binding it to the pectoralis fascia.
The lower border of the breast where it meets the chest wall.Synonym: submammary fold
See also: fold