<prompt> True about Raynauds disease are all except:More common in femalesGood prognosisPositive antinuclear phenomenonMost common cause of Raynouds phenomenon  <response>: Answer is C Positive antinuclear antibodies : Raynauds disease is the term applied for idiopathic Raynauds phenomenon when secondary causes of the phenomenon have been excluded. Presence of antinuclear antibodies points towards a secondary cause of Ravnauds phenomenon. ANA s are not associated with primary idiopathic Ravnauds disease. The most common cause of Raynauds phenomenon is Idiopathic Ravnauds disease. Raynauds phenomenonsyndrome is an episodic vasopastic disorder characterized by digital colour change white -- Blue -- Red, following exposure to cold and subsequent rewarming, or emotional stress. Idiopathic Raynauds phenomenon is also known as Raynauds disease. Raynauds disease term is applied when secondary causes of Raynauds phenomenon have been excluded. Over 50 of patient with Raynauds phenomenon have Raynauds disease. - Harrison Raynauds disease is more common in females Women are affected five times more often than men and the age of presentation is usually between 20-40 years. Raynauds disease has a good prognosis Raynauds disease is usually benign, causing mild disease appear to have the milder forms of Raynauds Phenomenon.- Harrison 