“…[12][13][14][15] Li is interesting because this small cation competes with Na for translocation across cell membranes via the Na pump, the Na channel, and Na cotransporters, in both kidney and choroid plexus. 16,17 As a result, Li therapy, which is effective in controlling bipolar disease in adults and children, 18 in some cases may be problematic in perturbing body fluid balance, 19 including the extracellular fluids and barriers of the brain and CSF. 20 Therefore, using choroid plexus transport modeling, 1,6 we seek to inform on a link between Li-carbonate (i.e., Li 2 CO 3) therapy, stimulated choroid plexus transport of Na, greater CSF formation, and the augmented ICP in PTCS of both adult and pediatric patients.…”