[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address Please contact the publisher to request reinstatement.
[Skip to Content Landing]
May 1963

Positive Papular Phototests in Normal Subjects

Author Affiliations


From the Department of Dermatology, University of Miami Medical School, and the Veterans Administration Hospital, Coral Gables, Fla.

Arch Dermatol. 1963;87(5):560-562. doi:10.1001/archderm.1963.01590170018003

The response to 8 minimal erythema doses of ultraviolet light filtered through a 280 mμ cut-off filter was determined in 21 subjects who had no evidence of a sunlight-induced eruption and had taken no photosensitizing drugs. Distinct follicular papules were produced in 5 of the 21 when a sufficient dose of ultraviolet light above 280 mμ was used.

This phenomenon should be recognized so that it will not be confused with true positive phototests.