I do have one question. I was told my AN was 10mm x 10mm x 7mm and 18mm where it extended into the IAC. I also read on the information I was shown that the volume was 537 I think cubic mms. Can anyone tell me would that be right or did I read it wrongly ?. I can’t for the life of me get 537 out of those figures. I know it doesn’t really matter now because I hope it’s receding rapidly but if anyone has any mathematical ability with regard to AN calculations I’d be pleased to know as I’m very curious.
The common way to do these calculations is by approximating the AN as an ellipsoid and using the formula volume=pi*dimension1*dimension2*dimension3/6. However you are right that the numbers that you quote above do not give the same result. A possible reason is that nowadays very sophisticated image analysis programs are used, which can evaluate the volume very accurately, by taking many measurements (i.e. instead of just the 3 dimensions commonly quoted). Also, obviously the total volume measurement quoted takes into account the volume of the portion (tail) going inside the IAC.
To put things into perspective, a difference between 537 cubic mms mentioned in your report and 367 cubic mms calculated from the formula I mentioned above seems big. But in terms of cubic cms, which are the usual unit of measurement, the difference is 0.537 versus 0.367, which when rounded would be 0.5 and 0.4, i.e. not a huge difference. For an AN as small as yours, the portion inside the IAC would account for the difference.
I hope that your treatment will be successful and that your AN will remain stable or, even better, shrink.
Marianna
