Semin Thromb Hemost 1997; 23(3): 259-269
DOI: 10.1055/s-2007-996099
Copyright © 1997 by Thieme Medical Publishers, Inc.

Homozygous Type I Plasminogen Deficiency

Anne-Marie Mingers, Norbert Heimburger* , Petra Zeitler, Hans Wolfgang Kreth, Volker Schuster
  • From the Children's Hospital, University of Würzburg, and the
  • *Behringwerke, Marburg, Germany.
Further Information

Publication History

Publication Date:
08 February 2008 (online)

Abstract

Homozygous type I plasminogen (Plg) deficiency has not been described in human subjects so far. Ligneous conjunctivitis is a rare and unusual form of chronic pseudomembranous conjunctivitis of unknown etiology.

Here we report for the first time on homozygous type I Plg deficiency in three unrelated female patients who suffered from ligneous conjunctivitis and additional pseudomembranous lesions of other mucous membranes. The disease is caused by massive fibrin depositions within the “extravascular space” of mucous membranes because of absent clearance by plasmin.

Infusions of albumin, fresh frozen plasma, or Lys-plasminogen (Lys-Plg) into two of the three patients revealed normal Plg activation capacity in these patients. The absence of fibrinolytic activity could therefore be shown to be due to Plg deficiency. Similar studies in the third patient have not been completed. In the two patients studied so far, infusions of Lys-Plg resulted in prompt and adequate Plg recovery with a short half-life and high amounts of plasmin-antiplasmin complexes and D-dimer.

One patient additionally revealed an inherited partial factor XII deficiency. Functionally, this factor XII deficiency did not interfere with Plg activation. However, there may be a pathway of Plg activation in this patient via the prekallikrein Cl-INH system.