by trys » 10 Mar 2010, 09:14
If somebody tests negative random growth hormone (GH), negative to (modified) Oral Glucose Tolerance Test for GH, and negative to IGF-1 (age & gender adjusted) then that person does not clinically have acromegaly. That's it.
If however there is a positive in any one of these tests, then it needs investigation further. Some other conditions can alter the outcome of the other test, can result in false-positives (or indeed false-negatives).
Acromegaly "symptoms" apart from this (if presented as a 'constellation' of symptoms) are bundled into the rather nebulous category of pseudo-acromegaly.
Trys
PS Paul - it's worth noting that pituitary tumours can mutate from a certain type of secreting tumour to another (even to/from non-functioning tumour). GH and PRL (Prolactin) secreting tumours have a very close resemblance to each other, and it's common for these tumour to be co-secreting PRL/GH tumours. It may well be that you had a GH/PRL tumour at one point (in other words, you did have acromegaly, but when tested you didn't) which then changed to only a PRL tumour. Perhaps even a GH only tumour, mutating to a PRL-only tumour. Also it's worth noting that groups of tumour cells can just die off due to various physical factors such as competing for a blood supply. Histology of the tumours they take out can sometimes shed light on this.
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http://acromegaly.wordpress.com Male, aged 40, diagnosed with Acromegaly November 2008. Underwent medical therapy (Sandostatin LAR) while we continued to try for children for twelve months. Surgery February 2010.