The<unk>  is an anatomic concept of the relationship of the 12th rib to the transverse processes of the lumbar vertebrae. There is one<unk>  on each side of the spine. The lateral part of the<unk>  is formed by the lower border of the 12th rib, and the medial part of the<unk>  is formed by the transverse processes of the lumbar vertebrae. The<unk>  is distinct from the<unk>  joints. The lower poles of the kidneys are within the<unk> s. A small amount of pleura extends below the ribs in the<unk> s.
Costovertebral angle tenderness
Precordial thump
Cervical motion tenderness
Juxtaphrenic peak sign
Abdominal guarding
Mediastinal shift
Xiphodynia
Lumbar enlargement