Because of the unknown etiology there are many different, and sometimes wrong names, (see etiology).

Respiratory illness of unknown etiology with onset since February 1, 2003, and the following criteria:

Sertraline appears to be associated with microscopic colitis, a rare condition of unknown etiology.

Parkinson's disease occurs in a variety of forms and with a largely unknown etiology.

Indeed, a significant fraction of pneumonia cases are due to unknown etiology.

It has been referred to as "atypical myopathy" or "myoglobinuria of unknown etiology".

Susac's syndrome is a very rare disease, of still unknown etiology, and many persons who experience it do not display the bizarre symptoms named here.

Introduction Rheumatoid arthritis is a chronic debilitating autoimmune disease of unknown etiology.

Red ear syndrome is a rare disorder of unknown etiology which was originally described in 1994.

The Picardy sweat was an infectious disease of unknown etiology.