Pittsburgh — A recent study demonstrates that larger margins than the frequently recommended 5 mm are required for excising lentigo maligna melanoma and melanoma in situ, according to Joy H. Kunishige, M.D., co-author of the study and a dermatologist in private practice in Pittsburgh.
"Our recent study (currently submitted for publication) looked at melanoma in situ with 6 mm margins — most surgeons do 5 mm ? and we found that 14 percent of patients still had tumors at that edge.
