Does dermoscopy increase the accuracy of skin cancer screenings?

Dermoscopy is a non-invasive diagnostic tool that allows for a more detailed examination of skin lesions and can aid in the early detection of skin cancers, including melanoma.

Dermoscopy involves the use of a handheld device (e.g., Dermlite DL5) that magnifies the skin lesion and illuminates it with polarized or non-polarized light. This allows for a more detailed examination of skin lesions, including the ability to appreciate very tiny, microscopic details which could serve as clues to an accurate diagnosis.

Common features evaluated in dermoscopy include the presence of pigmentation, blood vessels, and specific patterns in the skin lesion.

Studies have shown that dermoscopy can improve diagnostic accuracy and reduce unnecessary biopsies of benign lesions, particularly in the hands of experienced dermatologists. 

In one study, dermoscopy was found to be more accurate than clinical examination alone in diagnosing both melanoma and non-melanoma skin cancers.

However, it is important to note that dermoscopy should only be performed by trained healthcare professionals with experience in the technique, as misinterpretation of the features seen under dermoscopy can result in missed or incorrect diagnoses. 

Additionally, dermoscopy should be considered as an adjunct to clinical examination, and not as a replacement for a full skin exam.