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.
A few things: The most common causes of lumps under the skin (mobile or nonmobile) are lipomas (growth of fatty tissue) or cysts, which are both benign but can cause problems if they continue to grow. I don't think the itchy skin is related. There are various other growths/tumors that can present like this.