Tissue necrosis caused by distal capillary thrombosis resulting from cryoglobulin precipitation in the vessels. The black tissue under the nails is ischemic, and will eventually slough, or be reabsorbed by the body.
Reviewed last on: 3/28/2007
Mark Levin, MD, Hematologist and Oncologist, Newark, NJ. Review provided by VeriMed Healthcare Network.