Nailfold capillaroscopy - Raynaud phenomenon

(Panel A) The normal nailfold capillaroscopic pattern, showing regular disposition of the capillary loops along the nailbed (original magnification 200x, M Cutolo).
(Panel B) A decreased number of loops should be considered highly specific for secondary Raynaud phenomenon and induce "desertification" of the nailbed (original magnification 200x, M Cutolo).