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Item: Quad Cane Episodes: 2 (so far)  | 
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First Appearance: Whack-A-Mole [S03-E08]  | 
Cane #3 has been confiscated by a physical therapist treating House's sore shoulder. She has given him the Quad Cane and forced him to use it on the left side. While it is generally recommended that a cane is used in the hand opposite the injured leg, personal preference varies, and House prefers it on the right. He spots a hospital visitor with what will soon be Cane #4 and trades canes before the man really has a chance to argue. | 
 
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Second Appearance: Family [S03-E21]  | 
Cane #4 has been destroyed by Hector, Wilson's old dog. House has picked up a quad cane from somewhere in the hospital to use until he gets a chance to buy Cane #5 just a few scenes later. | 
 
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Next Appearance: ???  | 
For House's sake, we can only hope that the Quad Cane will not come back. | |