摘要To the Editor:A 57-year-old male presented to the clinic with a 1-year history of mass underneath his left fourth fingernail.Notably,he reported trauma to the subungual area of the fingernail 5 years ago.Thereafter,it did not heal and a mass emerged with tenderness,periungual swelling,and redness.A mycologic evaluation was negative.Then,topical antibiotic was prescribed.However,the mass enlarged gradually,with bleeding,ulceration,and crust.The patient had been smoking 20 cigarettes per day for 11 years,from age 21 to 32 years old,while no smoking since than.
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