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November 16, 1964

Comedo Extraction vs Comedo Expression

Author Affiliations


JAMA. 1964;190(7):690. doi:10.1001/jama.1964.03070200126040

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To the Editor:—  May I suggest that the procedure described by Lowney and associates in their very interesting paper regarding treatment of acne vulgaris (JAMA189:1000 [Sept 28] 1964) should be termed comedo expression, instead of extraction.From the description of their method it is evident that the authors did perform not an extraction, ie, act of pulling or drawing out, but an act of squeezing out and pressing out. According to general, as well as medical, dictionaries, this latter action should be called expression. Similarly, ophthalmologists for decades have been using the term expression, instead of extraction, of a cataract for those maneuvers whereby the lens is not pulled out of the eye but removed by pressure applied to the sclera or to the corneal limbus, without grasping the lens capsule (Klin Mbl Augenheilk64:365, 1920).

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