To determine the proportion of suspicious lesions referred by nondermatologists that are found to be malignant and the number of incidental skin cancers identified at the time of dermatology referral.
Retrospective cohort study.
Veterans Affairs Connecticut Healthcare System.
Four hundred patients referred by nondermatologists for skin lesions suspected of being malignant between January 1, 2006, through December 31, 2009.
Main Outcome Measures
Data collected included the type of referring provider, the final diagnosis by the dermatologist, and the number and type of incidental lesions.
Only 22.0% of the index lesions (ie, the lesions that prompted the referral) were found to be cancerous. In aggregate, 149 cancerous lesions were noted in 98 patients. However, only 88 (59.1%) were identified in the index lesion; 111 incidental lesions were biopsied by the consulting dermatologist, with 61 (55.0%) additional skin cancers identified. Twelve of the 61 incidental cancers (19.7%) were found in patients whose index lesion was clinically benign and was not biopsied.
Nondermatologists may benefit from focused educational initiatives on skin cancer detection, particularly the significance of the total body skin examination and the expectations for and limitations of teledermatology. A substantial proportion of malignant lesions was incidentally identified by the consulting dermatologist in addition to the primary lesion of concern. The use of teledermatology to assess a specific lesion of concern may be associated with underdiagnosis of clinically significant lesions that are not appreciated by the referring physician. Therefore, teledermatology must not be used as a substitute for a total body skin examination.