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 an armpit cyst is bothering you, Dr. Colin Tidy on Patient.info recommends visiting your doctor in these circumstances:18. 1  The cyst causes embarrassment or discomfort in your armpit. 2  The cyst is sore and tender to touch and there are signs of infection. 3  The lump in your armpit starts to grow rapidly.