Melanoma detection in British Columbia, Canada

Background In several studies, delays in malignant melanoma (MM) diagnosis have been correlated with increased tumor thickness, increased morbidity, and increased mortality. Objective We sought to assess how MM is detected in British Columbia, Canada, and to understand the role of patient education and other factors on diagnostic delays. Methods A self-administered questionnaire was distributed to 176 consecutive patients with histologically confirmed MM. Results The total median delay was 4 months. There was no correlation between tumor thickness and delay times. Lesions found incidentally by physicians were less invasive (median Breslow thickness 0.59 vs 1.0 mm, P=.006) than those found by patients. The majority of patients had some knowledge of MM and recognized the importance of early detection. Nearly one fourth of respondents were unaware MM could develop from a melanocytic nevus. In general, MM knowledge did not affect total delay. Conclusion Patients in British Columbia, Canada, report relatively short delays in diagnosis of MM. Delays were not correlated with increased tumor thickness or with patient knowledge regarding melanoma before diagnosis.