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Learning Center
Sentinel node biopsy
Learn what to expect during this procedure to remove lymph nodes for testing. The results can show whether cancer has spread.
Sed rate (erythrocyte sedimentation rate)
Sed rate is a blood test that can reveal inflammatory activity in your body. It's often used to help diagnose conditions affecting your joints or muscles.
Robotic myomectomy
Learn about this minimally invasive procedure to remove uterine fibroids that may reduce pain, blood loss and recovery time.
Robotic hysterectomy
Robotic hysterectomy is a minimally invasive surgery to remove the uterus.
Rheumatoid factor
Rheumatoid factor — This blood test can help diagnose autoimmune disorders such as rheumatoid arthritis, Sjogren syndrome and lupus.
Rh factor blood test
What's an Rh factor blood test? Understand this important test that's done during pregnancy.
Quad screen
What can a quad screen tell you about your baby? Get the facts.
Positron emission tomography scan
Learn how this imaging scan can play an important role in early detection of health problems, such as cancer, heart disease and brain disorders.
Polysomnography (sleep study)
Your health care provider may order this test if a sleep disorder such as sleep apnea is suspected. Learn how to prepare and what to expect.
Pelvic exam
Find out what happens during this exam, why it might be needed and how to prepare.
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