Weight-loss basics
Learning Center
Bladder removal surgery (cystectomy)
Learn about new ways to surgically remove the bladder and rebuild another urinary system.
Blepharoplasty
Learn what's involved and the risks, as well as what kind of results you can expect from this eyelid surgery.
Blood and bone marrow stem cell donation
Learn what these donations involve and what the risks are.
Blood donation
Find out what to expect during blood donation and how your blood will be used to help others.
Blood pressure test
Learn how this simple test is done, how often you need one and what the results mean.
Blood transfusion
A blood transfusion can help replace blood lost due to surgery or injury. It also can help if an illness prevents your body from making blood correctly.
Blood urea nitrogen (BUN) test
Learn about the blood urea nitrogen (BUN) test to assess kidney function and what possible results could mean.
Bone density test
If your doctor suspects you have osteoporosis, a bone density test can assess your bone strength. Learn about the risks and results of this procedure.
Bone marrow biopsy and aspiration
Learn what to expect with these tests, which are done to make sure your bone marrow is healthy.
Bone marrow transplant
Learn about this procedure that replaces unhealthy bone marrow with stem cells. Your own cells, donor cells or cells from umbilical cord blood may be used.
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