there are a few rare conditions that produce a false positive sweat chloride test. such situations include diseases of the adrenal thyroid or pituitary glands; rare lipid storage diseases; and infection of the pancreas. generally however these children are easily differentiated from patients with cystic fibrosis by their clinical condition and molecular tests for cystic fibrosis can be done to clarify the diagnosis.
can the sweat chloride be high without having cystic fibrosis?