“…Taken together, these findings indicate a high incidence of melanoma development in Japanese PLS patients. MM can also arise during other types of hereditary PPK, and the relevant previous reports are summarized in table 1[5, 8, 9,11,12,13,14,15,16,17,18,19,20,21,22]. It is remarkable that in the 18 cases of melanoma-associated PPK, 13 cases (76%) were Japanese, suggesting a high incidence of melanoma association in Japanese PPK patients.…”