Flipperflap, aussie pax is right on the money. These other characters know fcukall about the nuts and bolts and current data/research in a lot of cases. Just arse covering thats costing you the seat that you fought long and hard for.
Go to your surgeon and get him to write a report.
Go to your union and get them to communicate with the authority for you. Union lawyers tend to get quicker responses.
Congratulations on beating melanoma. I'd love to hear the story of the melanoma as it scares the crap out of me!
Good luck.