Is it possible for an extrinsic force to cause an intrinsic injury?
(Addendum to question due to lack of space in title):
Example -- A near fall and deep bruise to leg in a hospital
recovery room shortly after a microdiscectomy for herniated disc,
due to a defective arm on recliner chair (actually there were 2
incidents involving defective recliner chairs). Weeks later, MRI
showed a re-herniation of the disc. Would the reherniation (injury)
be considered intrinsic or extrinsic?