This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Type 1 plasminogen deficiency is a genetic condition associated with inflammed growths on the mucous membranes, the moist tissues that line body openings such as the eye, mouth, nasopharynx, trachea, and female genital tract. The growths may be triggered by local injury and/or infection and often recur after removal. The growths are caused by the deposition of fibrin (a protein involved in blood clotting) and by inflammation. The most common clinical finding is ligneous (‘wood-like’) conjunctivitis, a condition marked by redness and subsequent formation of pseudomembranes of part of the eye that progresses to white, yellow-white or red thick masses with a wood-like consistency that replace the normal mucosa. This can lead to vision loss. Growths in other areas can also lead to medical problems; those that occur in the gastrointestinal tract can cause ulcers, and growth in the windpipe can lead to breathing problems. Hydrocephalus may be present at birth in a small number of individuals. Type 1 plasminogen deficiency is caused by mutations in the PLG gene. It is inherited in an autosomal recessive pattern. Management depends upon the sites involved, but mainly focuses on managing the ligneous conjunctivitis.
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