Colloid degeneration of the skin, first described in 1866 by E. Wagner1 under the name colloid milium, is an extremely rare disease. Besnier2 reported a second case in 1879, to be followed by Feulard and Balzer3 in 1885 and by Perrin,4 who in 1892 presented the fourth instance of this interesting condition at the Second International Dermatological Congress, in Vienna.
More recently Jager,5 in 1925, and Labadie,6 in 1927, made valuable contributions to the subject, each presenting a case. Jager carefully reviewed the literature and was unable to find more than 20 undisputed examples of the condition as originally described by Wagner.
To the 22 cases already reported, another is being added, with the idea in view of ascribing to this condition a hitherto unmentioned etiologic factor.
REPORT OF A CASE
S. T., a French-Basque man aged 45, a sheep herder, has lived