Annals of Surgical Oncology

, Volume 15, Issue 2, pp 438–442 | Cite as

Terminal Duct Lobular Units are Scarce in the Nipple: Implications for Prophylactic Nipple-Sparing Mastectomy

Terminal Duct Lobular Units in the Nipple
Breast Oncology Original Papers



The use of nipple-sparing mastectomy (NSM) for both breast cancer treatment and risk reduction is increasing. There is no randomized data comparing nipple-sparing mastectomy with standard mastectomy techniques. There is evidence to suggest that ductal and lobular breast cancer arises in the terminal duct/lobular unit (TDLU). This study was undertaken to determine whether TDLUs exist in the nipple and if so, to what extent.


At the time of mastectomy the nipple papilla was excised and submitted for separate pathological examination. The presence or absence of TDLUs was noted.


Thirty-two nipples were studied in 22 patients. There were no TDLUs in 29 specimens. Three of 32 nipple specimens were found to contain TDLUs. The three nipples contain one, two, and three TDLUs respectively. All TDLUs were found at the base of the nipple, with none located near the tip.


The infrequent occurrence of TDLUs in the nipple papilla supports the use of NSM for risk reduction surgery, including for those women with BRCA1/2 mutations.


Prophylactic mastectomy BRCA1/2 Breast anatomy Breast cancer 


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Copyright information

© Society of Surgical Oncology 2007

Authors and Affiliations

  1. 1.Tulane University Department of Surgery and Omega HospitalNew OrleansUSA
  2. 2.Department of PathologyOchsner Health SystemNew OrleansUSA

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