Marijuana is shown to reduce stress, potentially cure (or reduce) tumors, has therapeutic effects that positively effect alzheimer's, and those suffering from PTSD have noticed breakthrough recovery as a result of medical marijuana.

Not to mention the repeated cases that marijuana can help those suffering from seizures.

Regarding other medical uses, it's difficult to say; because the DEA won't appropriately classify the drug to further medical research, which is long overdue.

;)