Thickness and diameter in melanoma: is there a relation?



To evaluate the relationship between diameter and Breslow’s thickness in skin melanoma.


2,071 skin melanomas incident in the area of activity of the Tuscany Cancer Registry (central Italy) were analyzed. Pearson’s linear correlation coefficient r was computed between diameter and Breslow’s thickness.


There was a statistically significant, but rather small, correlation between diameter and Breslow (r = 0.39). The same was true for men and women, for older and younger patients, and for skin subsites. 22.3% of the examined skin melanomas had a diameter ≤6 mm.


There was a statistically significant, but small, correlation between Breslow’s thickness and diameter in skin melanomas. Moreover, a non-negligible proportion of small lesions were thick and/or nodular.

Tumori 2016; 102(1): e1 - e3




Emanuele Crocetti, Laura Fancelli, Adele Caldarella, Carlotta Buzzoni

Article History


Financial support: None.
Conflict of interest: The authors have no conflicts of interest.

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  • Clinical, Descriptive and Registries Unit, Institute for Cancer Research and Prevention (ISPO), Florence - Italy

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