Value of serum prolactin in differentiating epilepsy from pseudoseizure.

We studied the serum prolactin levels in 35 cases with various types of seizures viz. generalized tonicolonic seizures (GTC), complex partial seizures (CPS), and simple partial seizures (SPS). We also studied 20 cases with pseudoseizure (hysteria) presenting in an epileptiform manner. Twenty two normal healthy subjects were also studied. All the cases were studied both in the postictal and interictal periods. Serum prolactin rose significantly in the postictal periods in patients with GTC and CPS, but patients with SPS or pseudoseizure did not demonstrate this rise. Thus serum prolactin estimation can be of help in differentiating true generalized seizures from pseudoseizure presenting in an epileptiform manner.