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To the Editor: Menzies’ recent editorial1 highlights the clear benefits of dermoscopy in the assessment of pigmented lesions. This is well appreciated by anyone who uses this inexpensive handheld tool on a day-to-day basis (its retail price ranges from A$380 to A$1840). Although the potential value of the device has been documented in both specialist and general practice settings, it would seem that most Australian general practitioners aren’t using this valuable technology.
We recently surveyed 223 predominantly Victorian GPs (at a dermatology symposium for GPs, Melbourne, August 2006) and a cross-section of 179 Australian dermatologists (at the 39th Annual Scientific Meeting of the Australasian College of Dermatologists, Melbourne, May 2006) on their use and perceptions of the value of dermoscopy (Box). The surveys were conducted at the end of dermoscopy seminars using electronic keypads that generated live feedback to questions posed.
The sample of dermatologists represented about 56% of all practising fellows of the Australasian College of Dermatologists and should thus be reasonably representative. On the other hand, we acknowledge that the sample of GPs may have been biased towards those with a particular interest (and more experience) in the area of skin cancer and dermatology — or, alternatively, biased towards novice GPs seeking more experience in the area.
Participation rates in each survey were over 90%. The majority of both groups of clinicians who reported using dermoscopy felt that it influenced their clinical diagnosis. However, only a third of GPs reported using dermoscopy as a diagnostic aid, in contrast with the vast majority of dermatologists (95%), who were regular users.
While there was a difference between the instrument preferred by GPs (the Welch Allyn EpiScope [Welch Allyn Inc, Skaneateles Falls, NY, USA]) and by dermatologists (the Heine Delta 20 Dermatoscope [Heine Optotechnik, Herrsching, Germany]), any one of the commercially available dermoscopes would be suitable for the novice user. The popularity of the Heine system is mostly due to its brighter light-emitting-diode illumination and adaptability to compact digital cameras. Although there is a general perception that non-polarised immersion contact dermoscopes offer superior imaging (this was reflected in the most popular choices from our survey), newer polarised non-contact dermoscopes are increasingly popular, and some of the earlier models are inexpensive. Polarised dermoscopes, such as the DermLite range of instruments (3Gen, LLC [San Juan Capistrano, Calif, USA]), offer the advantages of creating less mess (immersion fluid is not required) and better resolution of vascular structures. However, certain features critical for diagnosis of melanoma may be harder to appreciate with polarised systems (eg, the presence of regression structures or blue–white veil).2
The use of dermoscopy is fairly mainstream among dermatologists in continental Europe (Giuseppe Argenziano, Assistant Professor, Department of Dermatology, Second University of Naples, personal communication), where the technology was first established in the 1980s. However, dermatologists in the United States have been slow to embrace the technology: only 17% of dermatologists surveyed in a 2001 study were using the tool.3
In our personal experience, there is an increasing demand from Australian GPs for dermoscopic educational seminars. Given the high incidence of skin cancer in Australia, and the important role that Australian GPs play in managing the disease, we support Menzies’ assertion that training and familiarity with dermoscopy should be a priority.1
Victorian Melanoma Service, Alfred Hospital, Melbourne, VIC.
alex_chamberlainAThotmail.com
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©The Medical Journal of Australia 2007 www.mja.com.au PRINT ISSN: 0025-729X ONLINE ISSN: 1326-5377