<prompt> Vibration white finger:Consist of Raynauds phenomenon and loss of sensationMain pathogenic mechanism is severe degeneration of nervesComputer geeks are at risk of developing itIce provocation test is always reliable in precipitating attacks  <response>: Vibration white finger VWF Episodic appearance of white-finger skin patches Raynauds phenomenon in response to environmental cold. Is accompanied by secondary loss of sensation caused by vascular ischaemia. It can be pa of, but is not synonymous with Hand-arm vibration syndrome. 