Um, Letâs Rethink That Salute (1930s) Again, in his book To the Flag: The Unlikely History of the Pledge of Allegiance, Richard J. Ellis explains that by the mid-1930s, Americans had begun to notice eerie similarities between the Bellamy salute and the âHeil Hitlerâ salute.
A lumbar puncture may be used to collect a sample of cerebrospinal fluid in order to detect the presence of certain types of cancer or infection. Lumbar punctures may also be used to inject medications, such as spinal anesthesia or chemotherapy drugs.
It can be used also for identification of minimal residual disease or early recurrence in patients with a previous diagnosis of a B-cell neoplasm. Testing for both IGH and IGK gene rearrangements is reported to detect up to 99% of B-cell malignancies, compared to 80-90% for IGH and 85-90% for IGK alone.