progressive illness
disease or physical ailment which is in the course of worsening, growth, or spread of the disease
en-GB/pɹəˈɡɹɛsɪv ˈɪlnəs/
en-US/pɹəˈɡɹɛsɪv ˈɪlnəs/
disease or physical ailment which is in the course of worsening, growth, or spread of the disease