It is felt that since you have been on leave for 10 months which is significantly long period your leave sanctioning authority has raised his hands and has forwarded the matter to adminstration to take a call on extension on your leave. Adminstration has conveyed its decision to you.
Reason of your sickness, diagnosis, current situation of your health needs to be properly informed to the concerned official now i.e. Sr. Administrative officer, Leave sanctioning authority and other authorities.
In certain situations the authorities can be requested to examine the employee at home in all fairness or be referred to any doctor appointed by authority. This can otherwise be asked by the authotity also.
You can try by sending some of your representative e.g. your spouse, brother, sister etc to the authority and update them on situation of your health. Later you can place the visit on record in writing.
Kindly look into your appointment letter and it might have been mentioned that in case of prolonged absence from duty due to reasons..........including prolonged sickness the contract can be terminated. Termination during medicalleave can be a bad order.
Kindly make a proper representation to the authority in writing under acknowledgment.