Cancer of the nail bed

A woman who was mistakenly diagnosed with paronychia has been found to have squamous cell carcinoma of the nail bed.

The 61-year-old presented to a dermatology clinic with a three-year history of nail deformity and an indolent ulcer on her left thumb.

She told doctors that she had been treated several times with incision and antibiotic therapy after an initial diagnosis of paronychia, but the lesion had not resolved.

Physical examination revealed an irregular, pigmented, ulcerated lesion on the nail bed and a yellowish broken nail. There was

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