Comments on "A New Algorithm for Border Description of Polarized Light Surface Microscopic Images of Pigmented Skin Lesions

In this paper, discrepancies and reference inaccuracies in the paper (Grana , 2003) are pointed out. Specifically, it is demonstrated that the definitions of "lesion gradient" and "skin lesion gradient," widely used in a number of medical papers on computer analysis of pigmented skin lesions, are unambiguous, and that the "new algorithm for border description" described in the subject paper substantially relies on well-established concepts dating back over one decade ago