lung disease (lymphangioleiomyomatosis) is a rare lung disease that tends to affect women of childbearing age.
In LAM lung disease, muscle cells that line the lungs' airways and blood vessels begin to multiply abnormally. These muscle cells spread into areas of the lung where they don't belong.
The air sacs in the lung also swell and form small pockets called cysts. As the cysts develop throughout the lungs, LAM causes breathing problems similar to emphysema.
The muscle cells can spread...
And like a sleeping dragon, it's now nowhere to be found. Unless, of course, it wakes again. Will it? If anyone would know, that person would be Jeffrey Koplan, MD, MPH, former CDC director and longtime CDC disease detective, now vice president for academic health affairs at Emory University in Atlanta.
"Unknown," Koplan tells WebMD. "SARS can not come back; it can come back. Anyone who gives a firm statement of, 'This is what will happen with SARS,' I don't know where they are getting their information."
What is known, Koplan says, is that there's more than one sleeping dragon.
"The best-case scenario is we learn from SARS and prepare for what is going to be an inevitable return of this virus or something like it -- or something worse," Koplan says. "The worst case is we say, 'This isn't coming back,' or say, 'Other things are more urgent.' In that case, we are no better off than before. Right now, we are closer to nowhere."
This is the story of SARS -- so far. It's about what happened. It's about what we know and what we don't know. And it's about what, at our peril, we refuse to learn.
The ancient city of Foshan sits in the Pearl River delta of southeast China. Foshan is home to some 320,000 people. It's an industrial city, but its exquisite silks and porcelains -- and its famous Cantonese cooking -- make it a popular tourist destination.
In November 2002, people in Foshan began coming down with an unusually severe pneumonia. By January 2003, this pneumonia had spread to the nearby -- and larger -- city of Guangzhou. But it wasn't until mid-February that the World Health Organization got its first official report of 305 cases and five deaths from an unidentified respiratory disease.