Thank you for posting your query.
report suggests a mass lesion in the lower part of spinal cord
. The most likley causes of a mass like this could be a tumor
. In some cases, it may be due to infection.
This mass is pressing on your nerves of spinal cord, leading to weakness of legs.
This needs urgent evaluation by a neurosurgeon, who may advise you a surgery.
Wishing you good health,
Dr Sudhir Kumar MD DM (Neurology)