The woman is undergoing a strict regimen of immunosuppression therapy so her body does not reject the donor skin, a problem that has been encountered in other skin transplants, the doctors said.

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As more people use Botox as the ultimate wrinkle remover, doctors are realizing that its benefits delve far deeper than the skin.

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The immune-disease angle surfaced when doctors noticed that cancer patients who also had psoriasis found their skin improved when they took the immune suppressants methotrexate (for cancer) and cyclosporine (for organ transplants).

FORBES: Skin Deep

In these cases the doctors had trained in pediatrics and internal medicine and had simply hung out a skin-care shingle.

FORBES: Smart Patient Tip: Patronize Only Board-Certified Dermatologists

When a drug is likely to cause a severe side effect--say, an increased risk of heart attack, an allergic reaction that causes the skin to burn or liver failure--the standard practice is to warn patients and doctors about the product's labeling, and to send out warning letters to physicians who might prescribe the medicine.

FORBES: FDA Fix No. 5: Forget Labels