comorbidity

noun3

1. •
   The presence of one or more disorders (or diseases) in addition to a primary disease or disorder.

   • Extensive comorbidity is the hallmark of immunodeficiencies.
2. •
   A disease thus coexisting.

   • Coronary artery disease is often a comorbidity of diabetes mellitus.
3. •
   The effect of such additional disorders or diseases.