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Answer 4
  1. Dilated capillary loops on capillary microscopy. Raynaud’s phenomenon is relatively common as a primary disorder, occurring in approximately 2% of the general population. As only a small percentage of people with Raynaudıs have an associated CT disease, it is useful to know the prognostic factors. Dilated capillary loops observed by capillary microscopy and a positive antinuclear antibody test are the most important factors to indicate a possible connection. Younger age at onset also is associated with a higher likelihood of a CT disease. Alopecia, fatigue, and musculoskeletal symptoms are all features of CT disease but are too nonspecific to be helpful diagnostically unless they occur in the context of more specific signs and symptoms. A first-degree relative does increase the possibility of developing a CT disease but not to a degree that is helpful in making a diagnosis.

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