Achne

Atlas of Diseases of the Skin, 

including an epitome of pathology and treatment

Franz Mraček 

1899

"M.A., aged 17 years, somewhat pale, had suffered for several years from continued outbreaks of papules and pustules on the face, neck, shoulders, and back, having their seat in the sebaceous glands and ducts.   The lesions vary in size from a pinhead to a lentil, the larger lesions showing in the central part purulent contents."