Hi Michael
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I think really this is a question for other members; being logical it seems that the assessor was being ultra careful in his assessment and is waiting to see the outcome of your medical tests; as we all know it can take some time for the results of any scans etc to be 'read' and then decided upon, but maybe other members have had similar experiences and can advise you from their own experience?
I wouldn't worry about it too much - everyone is different and if you are at an awkward stage in your diagnosis, things like this are going to happen. Just keep your fingers crossed that all is well with your scan. Good luck