[MELALIB 15: A retrospective observational study of 383 cases of melanoma diagnosed by dermatologists in private...

Early detection of melanoma constitutes a major challenge and is a common reason for dermatological consultations. There is no recent data on melanomas diagnosed in the private medical sector in France, nor on the circumstances of diagnosis.

This was a retrospective observational study on records collating data on all new consecutive cases of melanoma diagnosed between January 2015 and June 2018, in the private sector only, by volunteer dermatologists belonging to the association for continuing medical education, "Dermatologie Paris XV". A data collection sheet was prepared on which to record information about the dermatologist, the patient, the main complaint, the characteristics of the melanoma, and the initial treatment given, using the computerized list provided by our dermatopathology offices.

The study involved 383 cases of melanoma, 37% in situ and 63% invasive, which consisted chiefly of superficial spreading melanoma. The median age of the cohort was 61 years and patients were predominantly female (58%). Follow-up of high-risk patients and complete routine examination (in those consulting for another reason) resulted in direct detection by a dermatologist of 202 of the 383 melanomas (52.7%); these melanomas had a lower median Breslow index than the rest of the cohort and were thin in the main. When patients consulted for a suspect lesion (139 cases), the lesion had been identified mostly by either the patient or by a relative (61% of cases). The decision to consult was made chiefly by the patients themselves, and the Breslow index was thicker. An initial consultation for nevus screening resulted in diagnosis of 42 melanomas, i.e. only 11% of the cohort. Dermoscopy was performed by 92% of the dermatologists participating in the study. Melanoma excision was performed in the office by the practitioner in 75% of cases, and management was validated at multidisciplinary meetings in 65% of cases.

In terms of French primary care, dermatologists in private practice play a key role in ensuring early detection and initial management of melanoma.