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The "o'clock positions" with hyphens has me questioning - myself in this one? Correct?

Posted: Apr 17, 2012

There is a focus of superficial squamous cell carcinoma at the 7:30- and 9:00-o'clock position, as well as the 6:00 to 7:30 position.  Of note, the 6:00 to 7:30 position was a focus of the deep margin.  The skull vertex and bone margins were also positive at that time.

PATHOLOGY:  Further peripheral skin biopsies located at 10:30 to 12:00; 9:00 to 10:30; 4:30 to 6:00; 3:00 to 4:30; 1:30 to 3:00; and12:00 to 1:30 were all negative for carcinoma.  The 7:30 to 9:00 o'clock biopsy showed a focus of superficial invasive squamous cell carcinoma and a background of actinic keratosis

I never use hyphens with o'clock - hmmm

[ In Reply To ..]
The BOS does not use hyphens with o'clock positions.

With something like 10:30 to 12 o'clock, that is how I would write it for clarity (because I don't use the word o'clock after 10:30).

No hyphens - NM

[ In Reply To ..]

And in case it wasn't clear in the other answers... - jld

[ In Reply To ..]
You certainly don't put the ":00" AND "o'clock" after the numbers. Yes, for anything ending with ":30" you use the colon and 30 (Seven-thirty or seven-thirty-o'clock position is still just 7:30 position), but not for o'clock. "Nine-o'clock" is 9 o'clock, NOT 9:00 o'clock. Hope that makes sense.

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