Doctors can collect it with a needle. But people who donate marrow must first have tests to make sure they are a good match for the patient.

VOA: special.2009.12.16

For example, they might stick themselves with a needle while treating patients.

VOA: special.2010.02.10

"A needle that goes through the skin needs to be as sharp as possible because that's going to be associated with the easiest access, the more slick closure, and the less pain when somebody has, say their blood drawn or their skin closed."

VOA: special.2010.02.10

Such needle sticks are common. But a recent study found that medical students often fail to report them.

VOA: special.2010.02.10

A special needle is inserted directly into the tumor and light energy is passed through a laser.

VOA: special.2010.11.23

Another popular type, the quill mum,has long, straight petals like a tube or needle.

VOA: special.2010.06.29

The Space Needle has a wide base on the ground.

VOA: special.2009.03.04