Revenue passenger miles. Revenue passenger miles (or RPM) measures demand for air transport. Itâs calculated as the number of revenue passengers multiplied by the total distance traveled. Itâs also called airline âtraffic.â. An increase in RPM is positive for an airline company. It means that more passengers are using their service.
Definition. An armpit lump is a swelling or bump under the arm. A lump in the armpit can have many causes. These include swollen lymph nodes, infections, or cysts.
Bacteria. Many types of bacteria can cause infections which are localized in the breast or arm and can drain into glands positioned underarms. This causes infections which lead to the lumps under the armpit. For instance, Bartonella Henselae is a bacterium that can cause swollen lymph nodes under the armpit.