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.
In rare cases, breast cancer or lymphoma may cause swollen lymph nodes in the armpit. Rarely, a person may have a node or group of nodes that grows rapidly and becomes hard and can not be easily moved around under the skin. These may indicate a tumor.