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.
If youâve discovered a lump in your armpit, donât be alarmed. In most cases, the cause is relatively harmless and easy to get rid of. Still, there are potentially serious causes of armpit lumps, so itâs important to always consult your doctor who can further explain whether further tests and treatment are required.