Advances in Breast Reconstruction: The Pap Flap Reduces Visible Scarring banner

Advances in Breast Reconstruction: The Pap Flap Reduces Visible Scarring

By Dr. Constance M. Chen

Women undergoing breast reconstruction after mastectomy have many options. The gold standard of breast reconstruction is natural tissue breast reconstruction, in which a woman’s own tissue is used to reconstruct the breast. Unlike implant-based breast reconstruction, a restored breast made of your own tissue is soft, warm, and grows or shrinks as you gain or lose weight. While natural tissue breast reconstruction produces the best aesthetic result and the highest levels of patient satisfaction, the biggest concern for patients tends to be the donor site, as there are additional scars from where the tissue is taken to reconstruct the breast.

Traditionally, natural tissue breast reconstruction uses tissue from an abdominal donor site, leaving a long scar from hip to hip similar to the scar from a tummy tuck. New innovations have led cutting-edge microsurgeons to transfer tissue from other areas with excess fat to reconstruct the breast. In the profunda artery perforator (PAP) flap, the fat and skin from the upper inner thigh is transferred to the chest wall to reconstruct the breast. The resulting scar from the upper inner thigh donor site is hidden in the buttock crease.

Depending on a woman’s anatomy, however, the donor site scar for the PAP flap can sometimes be visible. Young women with tight buttocks and a minimal crease may have visible scars. Some surgeons extend the PAP flap scar beyond the buttock crease. To combat visible scars, a new technique called the short-scar PAP flap has been developed, in which the scar from the donor site is very short and limited to the inner thigh only. The short-scar PAP flap results in a truly concealed scar that allows even very thin women with no buttock crease to wear barely-there bikinis that do not fully cover the buttocks to avoid a visible donor site scar.

Perforator flap reconstruction can use tissue from several donor sites. Most often, tissue is taken from the abdomen but the PAP flap is an alternative for women who have extra fat in the upper thigh. The upper thigh is generally used as a donor site when a woman is very thin and doesn’t have enough abdominal fat to create a new breast or when she has already had previous abdominal surgery.

In the PAP flap breast reconstruction, microsurgical techniques are used to isolate the tiny blood vessels that keep skin and fat of the upper thigh alive, the upper thigh tissue is then transferred to the chest wall, and then the blood flow to the tissue is restored by sewing the blood vessels from the upper thigh tissue to matching blood vessels in the chest wall under an operating microscope. The soft upper thigh fat is then shaped to create a new breast. The PAP flap does not take any muscle at all with the flap, which reduces postoperative pain and recovery time. An additional benefit of the PAP flap is that the removal of excess thigh tissue results in a slimmer upper thigh and a rounder, better defined buttock – the equivalent of a cosmetic thigh or buttock lift.

Women should discuss their concerns about scarring with their surgeons and ensure that every possible measure is taken to minimize scarring. A key benefit of the PAP flap is the ability to minimize visible scarring at the donor site. The scar is invisible from the front and well concealed in the back. The short-scar PAP flap further limits the scar so that it is not visible even in a skimpy bikini and in young and thin women without an obvious buttock crease.

The quality of the tissue taken from the upper thigh often creates a breast with a particularly soft, youthful appearance. The PAP flap is a complex yet elegant procedure that preserves muscle strength, reduces postoperative recovery time, and has a well-concealed donor site. By minimizing scarring, the short-scar PAP flap takes natural tissue breast reconstruction to the next level so that women can move on to live a comfortable and natural life.

Many of our patients have volunteered to speak with other women who may have questions about what it is like to go through restorative breast and body surgery. If you would like to speak with someone who has already gone through the process, please contact us and we will find a “buddy” for you.


The Bosom Buddies are available for emotional support, practical tips, sharing stories, and other types of real life help that can help other women feel more comfortable and safe in their journey.

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As one of the leading breast reconstruction specialists in the United States, Dr. Constance Chen has been featured in over 100 news and media publications and journals over her years in practice.

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