Skin care
Learning Center
Lumbar puncture (spinal tap)
Learn about lumbar puncture, which removes a sample of cerebrospinal fluid to find infections, bleeding and other conditions. It also is called a spinal tap.
Laryngotracheal reconstruction
Laryngotracheal reconstruction surgery — Comprehensive overview covers why it's done and what's involved with the procedure.
Intravenous pyelogram
An intravenous pyelogram is an imaging exam that may be used to help diagnose urinary tract disorders. Learn what to expect during the exam.
Intraoperative magnetic resonance imaging (iMRI)
Find out how neurosurgeons use intraoperative magnetic resonance imaging (iMRI) during brain surgery.
Ileoanal anastomosis (J-pouch) surgery
This surgery removes the large intestine. It's often done to treat ulcerative colitis and other bowel conditions.
Hormone therapy for prostate cancer
Find out what to expect during testosterone-blocking therapy. Learn about choices, including medicines and surgery.
Holter monitor
This wearable device keeps track of the heart's rhythm during daily activities. Learn when you might need one and what to expect.
Hematocrit test
Learn about this red blood cell blood test, including why it's used and what to expect.
HPV test
The HPV test can help identify your risk of cervical cancer. Learn more about how to prepare and what your results may mean.
Glucose tolerance test
These simple blood tests are performed to screen for diabetes. Your healthcare professional may suggest one or more of these tests depending on your risk factors.
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