Companies making blood-based cancer screening tests face a number of barriers to full market entry but getting a foothold of any kind can be the start of a path towards greater ultimate uptake.

At Digestive Disease Week, Celltrion will seek to strengthen its hold on the IBD market, Ironwood hopes to expand Linzess into pediatric functional constipation, and competitors will showcase competing short bowel syndrome treatment and colorectal cancer companion diagnostics.