Spelling and punctuation

Although Radiopaedia.org initially favoured the use of British spelling, e.g. "haemorrhage" rather than "hemorrhage", it has been decided that is silly and pointless to argue over such things. 

Several of our current editors favour British spelling, but it is accepted that we will have a mix on UK and US spellings on the site. While either spelling is fine, we prefer the UK spelling for the title of articles and content. Alternative spellings can be included in the synonyms section, e.g. US English.

If you use one type of spelling ensure you stick to the same for the entire case.

Specific words

A list of words that have different spellings with the British spelling, which is favoured on this website, mentioned first:

  • ageing vs. aging

Some specific word choices that merit a discussion of their own:


All words with prefixes (e.g. hyper, hypo, intra, extra) should be one word, with a hyphen if a duplicate letter is present:

  • hypointense
  • extra-axial
  • interpeduncular


The British use of commas and periods outside quotation marks (if not part of the original quotation) is preferred to the American use of punctuation within quotation marks:

  • British: The vessel has been termed the "innominate".
  • American: The vessel has been termed the "innominate."

Help and Style Guide
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Article Information

rID: 6489
Synonyms or Alternate Spellings:
  • British and American spelling
  • British spelling
  • American spelling

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