Calcifying pulmonary metastases (mnemonic)

Last revised by David Luong on 27 Aug 2021

A useful mnemonic to remember the causes of calcifying pulmonary metastases is:



  • B: bone (chondrosarcoma, osteosarcoma)
  • O: ovary
  • B: breast
  • C: colon
  • A: any primary post-chemotherapy
  • T: thyroid and testis 


Another useful mnemonic is BOTTOM.

  • B: Breast
  • O: Osteosarcoma
  • T: Testicular
  • T: Thyroid
  • O: Ovarian
  • M: Mucinous adenocarcinoma


ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

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

 Thank you for updating your details.