any of several cytologic smears obtained from different parts of the alimentary tract; obtained by specialized lavage techniques and used mainly to diagnose cancer in those parts
any of the important motor nerves on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral root of the spinal cord
any of several cytologic smears obtained from different parts of the lower respiratory tract; used for cytologic study of cancer and other diseases of the lungs