"A one year old male Panther Chameleon presented to the clinic following a one week history of progressive hind limb weakness, loss of motor function, swelling of the left knee and sleeping with his back legs dangling from his branch"...
https://exoticpetvetblog.wordpress.com/2014/11/25/renal-tumour-in-a-chameleon-a-case-study/
https://exoticpetvetblog.wordpress.com/2014/11/25/renal-tumour-in-a-chameleon-a-case-study/