A Salt Lake girl who received the first live-donor lung transplant and her mother, the donor, were in good condition at the Stanford Medical Center in California, according to Joyce B. Thomas, a hospital spokeswoman.

A lobe from the mother's right lung was removed Thursday and implanted to replace her 12-year-old daughter's right lung. The daughter's lung was damaged by a respirator she was placed on after she was born prematurely.The identities of the daughter and her mother, 48, haven't been released at the family's request. The four-hour transplant operation was the first of its kind in the nation.

The girl's condition, called bronchopulmonary dysplasia, causes scarring and high pressure in the lung. A parent-child transplant was performed because of a close tissue match between the two, which surgeons hope will lessen the possibility of the child rejecting the lung tissue.