[Plasma fibronectin in gastric and duodenal ulcer].

Solid phase enzyme immunoassay was made to measure fibronectin in blood plasma of 132 patients with ulcer and healthy controls. Exacerbations of ulcer occurred in a significant lowering of fibronectin concentration which tended to an increase with ulcer healing. In the scarring phase fibronectin levels returned to normal. A local stimulating action of a plasma fibronectin preparation on scarring of the ulcer defect is validated.