Case history
Case history #1
An otherwise healthy 60-year-old man with white skin (Fitzpatrick Type 1) presents with multiple raised pigmented lesions over his back and chest. He complained that these lesions were gradually increasing in size and number. The patient is worried about melanoma. He remembered that his parents and other family members had similar lesions. He commented that some spots are extremely pruritic. Examination of the patient's skin revealed multiple light- and dark-brown warty papules and plaques on his torso with a "stuck-on" appearance.
Case history #2
A 25-year-old woman with black skin (Fitzpatrick Type VI) presents with multiple raised pigmented lesions on her face and neck. She initially thought these were "freckles" but some are itchy and she is concerned that they have slowly been increasing in size and number. Her mother and maternal aunt have similar lesions.
Other presentations
The Leser-Trélat sign is the appearance of a high number of seborrheic keratoses over a short time interval, especially on the torso.[3][5][6][7] It may be a paraneoplastic phenomenon associated with a gastrointestinal tract adenocarcinoma but this is debated in the literature.[8]
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