Abstract
Though Psoriasis is one of the most common
diseases of the skin, and very widely distributed, yet
when we read the descriptions given by the standard
authorities on Dermatology, we cannot help being at once
struck by the manifest conflict of opinion concerning
almost everything connected with the disease. This is
more particularly marked when we study the accounts of
the histo-pathology, and aetiology, and as a natural consequence, opinions as to the details of the best methods
of treatment differ widely also.
This work was therefore undertaken for the purpose of endeavoitring to clear up some points in the histepathology, and if possible to determine at least the probable aetiology; and in order to aid us in arriving at
logical conclusions with regard to the subjects under
discussion, we have added an account of the most approved
methods of treatment and the symptoms and progress. For
completeness'sake we have given also the prognosis and
diagnosis.
Though we have found it necessary- to make a
critical resume of what has heen written upon the whole
subject, taking in order the headings under which a
disease is usually described,we wish to draw particular
attention to that portion devoted to the histo-pathology
and aetiology of the disease, and with regard to the
latter especially to the discussion of the relative
merits of the neurotic and parasitic theories of origin.
