Ms. Postal was diagnosed with what is called the sporadic or spontaneous form of the disease, meaning that it arose from no known cause.

A short second season of "five secret episodes" has since aired in sporadic form.

Wolves experienced sporadic form during the early part of 2002-03, and thus were never in contention for the automatic promotion places.

The peak incidence of the sporadic form is in the fifth and sixth decades of life.

The average age at onset for the sporadic form is 9-11 weeks.

Medullary thyroid cancer occurs in two forms, sporadic and familial.

In the sporadic form, the tumor is usually unilateral.

Aniridia may be broadly divided into hereditary and sporadic forms.

This means the vast majority are the sporadic form.

Doctors aren't certain what causes the sporadic form.