Osteonecrosis of the knee develops through four stages, which can be identified by symptoms and X-rays. Stage I: Symptoms are most intense in the earliest stage. Symptoms may continue for 6 to 8 weeks and then subside. Because X-rays are normal, a positive bone scan is needed to make the diagnosis.
Judy Garland 'Dorothy' died June 22, 1969. Frank Morgan 'Professor Marvel, The Gatekeeper, The Carriage Driver, The Doorman, The Wizard of Oz' died September 18, 1949. Ray Bolger 'Hunk, The Scarecrow' died January 15, 1987. Bert Lahr 'Zeke, The Cowardly Lion' died December 4, 1967.
In The Wonderful Wizard of Oz, Oscar leaves Oz at the end of the novel, again in a hot air balloon. After the Wizard's departure, the Scarecrow is briefly enthroned, until Princess Ozma is finally found by Glinda and freed from the Wicked Witch Mombi at the end of The Marvelous Land of Oz (1904).