To the Editor: Primary care skin cancer clinics continue to receive negative publicity. We have previously reported on the workload profile of one network of clinics.1 We report here the profile of clinical activity of the four MoleScan skin cancer clinics situated on the Sunshine Coast, Queensland. Between them, these clinics have been open for a total of 22 years, ranging from 2 years to nearly 9 years of operation.

MoleScan is a service company with clinics across Australia. Doctors are employed as subcontractors and are provided with digital dermascopes. The clinics do not have dedicated day surgery facilities, and surgical procedures are conducted in the consulting rooms (http://www.molescan.com.au).

Using Medicare Benefits Schedule item number billing data (as previously reported1), we calculated the number of consultations, biopsies, excised lesions (benign, non-melanoma skin cancers [NMSCs] and melanoma), surgical repairs, non-surgical treatment of skin cancers, and non-surgical treatment of other skin lesions. We also estimated the number needed to treat (NNT), defined as the number of benign lesions removed per melanoma.

There were 98 276 consultations at the four clinics during the 22 years of operation (Box). In all, 14 982 skin cancers were treated: 395 melanomas and 7468 NMSCs by surgical excision, and 7119 NMSCs by non-surgical methods. The estimated NNT was 22.5.

Of the 16 962 lesions excised, 11% (1812) were repaired by a skin flap, 68% (1226) of which were simple flaps. Our previous report, on a different network of clinics,1 showed a different pattern of surgical repairs: 33% (2651) of the 8055 lesions excised were repaired by a skin flap, 45% (1187) of which were simple flaps. Clearly, the clinical practices of these two clinic networks vary.

Another area of apparent difference between the two clinic groups is the NNT — 22.5 reported here, compared with 28.6 from the other network.1 The lower NNT in these MoleScan clinics may result from the use of digital dermoscopy, but this requires further study.

These early findings from our analyses of MoleScan data highlight the dangers of generalising about the activities of primary care skin cancer clinics from one dataset. Workload profiles of different clinical services may vary markedly, and the widely expressed concern about large numbers of inappropriate surgical repairs may not be warranted.

Activities billed at four MoleScan skin cancer clinics on the Sunshine Coast, Queensland, over a total of 22 years of operation

* Eyelid, nose, ear, lip, neck, hand, digit or genitals.