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Porokeratosis usually occurs on the trunk or the extremities, and facial lesions are rare; in a review of 165 000 consecutive biopsy specimens, some authors found only seven patients with facial porokeratosis. 9 We also emphasize the clinical appearance of these lesions, which may easily be misdiagnosed if not examined correctly. As a consequence of misdiagnosis, the prevalence of these lesions is probably greater than at presently estimated.

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