Painful subungual tumor incorrectly classified as squamous cell carcinoma: A diagnostic pitfall!

    The patient was a 38 year old female with a history of warts and SCC of the toe treated with amputation presenting with a painful growin tomor of the right thumb nailbed.

    The tumor was seen on Xray eroding the bone of the distal phalanx, was diagnosed as SCC and treated with amputation.

    Later on it became apparent that the patient has incontinential pigmenti.

    Was the diagnosis correct?