Thailand 's King Bhumibol Adulyadej is diagnosed with cancer and pneumonia . Watch why king 's health is big issue » . King Sri Adulyadej is world 's longest - reigning monarch . King wields little power but is deeply religious and enjoys immense popularity .
Thailand 's King Bhumibol Adulyadej is diagnosed with cancer and pneumonia . King Sri Adulyadej is world 's longest - reigning monarch . King wields little power but is deeply religious and enjoys immense popularity .