Supernumerary nipples or breasts are found in 1-5% of the population. A 31-year-old woman presented with an axillary lump which had tenderness during postpartum period. On routine MRI sequences signal intensities similar to normal breast parenchyma but discontinuous with it were demonstrated. It is important to differentiate benign from malignant axillary masses to avoid unnecessary intervention. MRI has been reported to be a valuable tool for the diagnosis of accessory breast tissue especially in the peripubertal–pubertal girls and young patients.
Keywords: MRI, ectopic breast tissue, lactational period
