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With modifications, scientists should be able to grow a human heart by taking stem cells from a patient's bone marrow and placing them in a cadaver heart that has been prepared as a scaffold, Ms. Taylor said in a telephone interview from her laboratory in Minneapolis. Todd N. McAllister of Cytograft Tissue Engineering in Novato, Calif., said, 'Doris Taylor's work is one of those maddeningly simple ideas that you knock yourself on the head, saying, 'Why didn't I think of that?'' Mr. McAllister's team has used a snippet of a patient's skin to grow blood vessels in a laboratory, and then implanted them to restore blood flow around a patient's damaged arteries and veins.

Todd N. McAllister of Cytograft Tissue Engineering in Novato, Calif., said, ''[Doris A. Taylor]'s work is one of those maddeningly simple ideas that you knock yourself on the head, saying, 'Why didn't I think of that?'<0>'' Dr. McAllister's team has used a snippet of a patient's skin to grow blood vessels in a laboratory, and then implanted them to restore blood flow around a patient's damaged arteries and veins. ''The heart is a beautiful organ,'' Dr. Taylor said, ''and it's not one that I thought I'd ever be able to build in a dish.'' Beginning Jan. 15, Adam Liptak's column, ''Sidebar,'' will appear on Tuesdays. Dan Barry's column, ''This Land,'' will return on Monday, Jan. 21

Using cells from newborn rats, researchers in Minnesota built a new heart that..

'We just took nature's own building blocks to build a new organ,' [Doris Taylor] said of her team's report in the journal Nature Medicine. The researchers removed all the cells from a dead rat heart, leaving the valves and outer structure as scaffolding for new heart cells injected from newborn rats. With modifications, scientists should be able to grow a new human heart by taking stem cells from a patient's bone marrow and placing them in a cadaver heart that has been prepared as a scaffold, Taylor said in a telephone interview from her laboratory in Minneapolis. The early success, she said, 'opens the door to this notion that you can make any organ: kidney, liver, lung, pancreas - you name it and we hope we can make it.' 'If it works,' Taylor said, 'it means that there'll be many more organs available for transplants.'

Experts not involved in the Minnesota work called it 'a landmark achievement' and 'a stunning' development, but they and the Minnesota researchers cautioned that the dream, if ever realized, was still a decade away. With modifications, scientists should be able to grow a human heart by taking stem cells from a patient's bone marrow and placing them in a cadaver heart that has been prepared as a scaffold, [Doris A. Taylor] said in a telephone interview from her laboratory in Minneapolis. The early success 'opens the door to this notion that you can make any organ: kidney, liver, lung, pancreas -- you name it and we hope we can make it,' she said

The White House said that it had not seen the study and would not comment on its estimated death toll, but that the recent increase in American forces had reduced civilian and military casualties. ''We mourn the deaths of all people in Iraq,'' said Jeanie Mamo, a White House spokeswoman. In a telephone news conference organized by the health organization, a voice identified as that of the Iraqi health minister, Salih Mahdi Mutlab al-Hasnawi, said, ''It is a very sound survey, and the sample is a good sample,'' and ''I believe in those numbers.'' Mohamed M. Ali, a health agency statistician and co-author of the report, said that ''in the absence of comprehensive death registration and hospital reporting, household surveys are the best we can do.'' Even then, the figures collected are likely to be underestimates because ''some homes could not be visited because of high levels of insecurity and more people move residence in times of conflict,'' Mr. Hasnawi, the health minister, said in a statement issued by the W.H.O

Not performing an autopsy of Ms. [Bhutto] ''was a severe mistake, especially in the light of past problems with the murders of national leaders,'' because it will fuel speculation, said Dr. Michael M. Baden, who is a top forensic official for the New York State Police as well as a former New York City chief medical examiner. Seven doctors, but no forensic pathologist, signed Ms. Bhutto's medical report. None were ''trained to pick up the finer points of gunshot wounds'' and other causes of criminal deaths, Dr. Baden said. For example, her doctors said they did not feel a bullet or foreign body, but did not probe for evidence of one. ''With [John F. Kennedy], the treating doctors were wrong about the entrance and exit wounds'' of the bullet-damaged skull, said Dr. Baden, who was chairman of the forensic pathology panel of the House of Representatives select committees on the assassinations of Kennedy and the Rev. Dr. Martin Luther King Jr

Mr. [Rudolph W. Giuliani] was given a diagnosis of prostate cancer in 2000, which led him to abandon his race for the United States Senate against Hillary Rodham Clinton. Dr. [Valentin Fuster] said that Mr. Giuliani had had a P.S.A. test, which checks for prostate cancer, within the past month, and that it was ''negligible or undetectable.'' ''I got checked out up and down, inside and out,'' he said, adding, ''I think I might have ended up being more tired from the tests afterward than I was from the headache.''

Even after their reconciliation last month, Dr. [Michael E. DeBakey] said that Dr. [Denton A. Cooley] had ''disappointed me with his ethics'' and ''poor judgment'' in doing the implant, which was ''a little childish.'' After the reconciliation, he said in an interview that ''there was no reason to consider him an enemy'' and ''we have never had any bad words,'' although ''we haven't had very much in the way of communication.'' In the reconciliation meeting, Dr. Cooley told Dr. DeBakey he regretted that they had become so distant and hoped that the ''temporary truce or cease-fire'' they had reached in their ''rivalry'' and ''small battle'' would become permanent