[Bisalbuminaemia. Three aetiologies: hereditary mutation, antibiotic therapy, pseudocyst of the pancreas (author's transl)].

The demonstration of a double albumin line on blood protein electrophoresis has important practical applications: after eliminating congenital bisalbuminaemia, with no pathological consequences, this abnormality may make it possible to detect an overdose of beta-lactamines, requiring the interruption of treatment, or a serious effusion of pancreatic origin justifying surgery.