Extra pleural Sign / 


  • Peripheral density
  • Sharp inner margin
  • Indistinct outer margin
  • Obtuse angle with chest wall
  • Expanding rib lesion
  • "Cat under the rug" sign

Resected specimen and close up below.

Resected rib with characteristic appearance.

Close up below.

Arrows pointing to expanding rib lesion and angles of contact with chest wall..