The Collaborative International Dictionary of English v.0.48:

Autopathic \Au`to*path"ic\, a. [See Auto-, and Pathic, a.]
   (Med.)
   Dependent upon, or due or relating to, the structure and
   characteristics of the diseased organism; endopathic; as, an
   autopathic disease; an autopathic theory of diseases.
   [Webster 1913 Suppl.]