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Incidence of morphological variants of melanoma.

In the ‘Materials and methods’ section, the authors state that they divided their cases into five histological categories. Category no. 2 is mentioned as malignant melanoma in lentigo maligna (LMM) and the ICD-O code for this is 8742. However, in their ‘other specified morphologies’ category (category no. 5), they have once again placed cases with the ICD-O code 8742. This means that all cases with the code 8742, which are in fact LMM, are apparently included in their ‘other morphological’ category. However, the number of cases they report is not consistent with this. Consequently, I suspect that this problem may have arisen from a typographical error. In either case, it is worth addressing and correcting the error to prevent any possible confusion.