Email this page Print this article Was this page helpful?

Trypsinogen

Also known as: Trypsin-like immunoreactivity; Serum trypsinogen; IRT
Formal name: Immunoreactive trypsinogen
Related tests: Stool trypsin and chymotrypsin; Sweat chloride; CF gene mutation

At a Glance

Why Get Tested?

To screen for cystic fibrosis (CF) and pancreatic insufficiency by evaluating pancreatic function

When to Get Tested?

When you or your infant have symptoms of pancreatic insufficiency such as persistent diarrhea, foul-smelling bulky greasy stools, malnutrition, and vitamin deficiency; these are also symptoms of cystic fibrosis (CF), so trypsinogen may be ordered as part of newborn general population screening and/or if a newborn has meconium ileus

Sample Required?

A blood sample drawn from an infant’s heel, a spot of blood that is put onto filter paper, or a blood sample drawn from a vein in the arm

Test Preparation Needed?

None