All the white blood cells are able to move like an amoeba, and can migrate out of blood vessels into the surrounding tissues. Note-it is easy to confuse the different leucocytes in blood smears. To identify them, you need to look for the shape of the nucleus, and compare their size, relative to that of a red blood cell.
peri-. a prefix meaning âabout,â âaroundâ (perimeter; periscope), âenclosing,â âsurroundingâ (pericardium), ânearâ (perigee; perihelion).
- cancer.gov. In broad terms, peri(around) ampullary(referring to the ampulla of Vater)cancer is a type of cancer that grows at the start first part of you intestine, the duodenum. It grows a tumor and manifests painless symptoms at the start, but grows very painful when the disease is already spread out.