Royalty free and rights managed images relating to other diagnostic techniques such as lumbar punctures and SIAscope (spectrophotometric intracutaneous analysis scope) images. Biopsy and other tissue samples are examined by pathologists using light microscopes. Lumbar punctures are used to obtain a sample of spinal fluid for testing. Also shown here are cervical smears, testing of stools, and biopsies of the brain, lymph nodes and the prostate. Many of these techniques are used to test for the presence of cancer in a wide range of body tissues and organs. Pictures and photographs include laboratory workers analysing and examining samples.