The National Cancer Institute of Thailand discovered that 50% of their terminal patients reported improvement in pain relief after taking THC for 30 days.
Additionally, the Department of Medical Services found that their clients also had health and appetite improvements after 90 days of THC use. This may not sound unique, but they used a specific strain of cannabis — canniprene — to show its potent anti-inflammatory effects.
the Prasat Neurological Institute and Queen Sirikit National Institute of Child Health found that symptoms had improved in 10 out of 16 children with difficult to treat and intractable epilepsy.
A summary article of Thai research is here.