Snapshot quiz 17/13
Authors: Mukherjee R, Parik M and Roy P
Subungual melanoma. The extension of pigmentation beyond the nail plate to the surrounding structures, including the eponychium, is known as Hutchinson’s nail sign, and is seen in subungual melanoma. This distinguishes it from subungual haematoma, which remains confined to the nail bed. The patient underwent an incisional biopsy to confirm the diagnosis, followed by digital amputation.