Definition of phlegm for English Language Learners. : 1  a thick, yellowish liquid that is produced in the nose and throat especially when a person has a cold. : 2  calmness in a difficult or unpleasant situation.
Kneecap (Patellar) Subluxation. A subluxing patella (kneecap) is a temporary, partial dislocation of the kneecap from its normal position in the groove in the end of the thigh bone (femur). This groove is located between two bumps at the end of the thigh bone called the femoral condyles.
Closed Fracture. Most types of patella fractures are closed fractures, in which the patella does not break through the skin. Some types of closed fractures may be treated without surgery. Open Fracture. An open fracture occurs when the broken bone breaks through the skin, exposing the injured patella.