Harrington rod: An old type of spinal instrumentation
used to correct scoliosis.
Health maintenance organization: A type of
insurance coverage for medical care in which all care is given
by a group of doctors who are under contract to provide services
at a reduced fee.
Herniated disc: A lumbar intervertebral disc
in which a portion of the nucleus pulposus has moved to an
abnormal position.
Hologram: a three-dimensional image projection.
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