Elevated serum TGFBI levels in patients with 3 types of gastrointestinal tract carcinomas. Each patient serum sample was measured in duplicate for TGFBI levels with ELISA, and the mean of each sample was plotted as a dot, with tumor type and patient number indicated; the horizontal bars are group medians. TGFBI levels in patients of each tumor type were compared with those in control patients. Statistical significance is indicated by asterisks. **p < 0.01 (2-tailed Student’s t test).