Eggshell calcification (lymph nodes)

Eggshell calcification refers to fine calcification seen at the periphery of a mass and usually relates to lamellar lymph node calcification. For similar appearance in the breast see eggshell calcification (breast).

In 1967 Jacobsen and Felson published criteria to help "avoid over-reading of the incidental circumferential concentrations of calcium and to eliminate confusion with the ring shadows of bronchi on end." These criteria were 6:

  • shell-like calcifications up to 2 mm thick must be present in the peripheral zone of at least two lymph nodes
  • the calcifications may be solid or broken
  • in at least one of the lymph nodes, the ringlike shadow must be complete
  • the central part of the lymph node may show additional calcifications
  • one of the affected lymph nodes must be at least 1 cm in its greatest diameter

In the mediastinum and thorax 3,4:

For eggshell like calcification appearances in the thorax consider:

Inspired signs

Article information

rID: 1262
System: Chest
Section: Signs
Synonyms or Alternate Spellings:
  • Eggshell calcifications
  • Eggshell calcifications - general
  • Egg shell like calcification

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: photograph - egg
    Drag here to reorder.
  • Case 1: from calcified oil cyst
    Drag here to reorder.
  • Case 2: sarcoidosis
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.