Overview
What is the pathophysiology of seborrheic keratosis?
What is the role of genetics in the pathophysiology of seborrheic keratosis?
What causes seborrheic keratosis?
What is the prevalence of seborrheic keratosis in the US?
What is the global prevalence of seborrheic keratosis?
What are the racial predilections of seborrheic keratosis?
How does the incidence of seborrheic keratosis vary by sex?
Which age groups are at highest risk for seborrheic keratosis?
What is the prognosis of seborrheic keratosis?
What information about seborrheic keratosis should patients receive?
Presentation
What are the signs and symptoms of seborrheic keratosis?
Which physical findings are characteristic of seborrheic keratosis?
Which findings on epiluminescent surface microscopic exam suggest seborrheic keratosis?
What are variants of seborrheic keratosis?
What are the complications of seborrheic keratosis?
DDX
How is seborrheic keratosis differentiated from other benign lesions and malignancies?
What are the differential diagnoses for Seborrheic Keratosis?
Workup
What is the role of lab studies in the workup of seborrheic keratosis?
What is the role of imaging studies in the workup of seborrheic keratosis?
What is the role of biopsy in the diagnosis of seborrheic keratosis?
Which histologic findings are characteristic of seborrheic keratosis?
Which histologic findings are characteristic of the hyperkeratotic type of seborrheic keratosis?
Which histologic findings are characteristic of clonal seborrheic keratosis?
What are the histologic differential diagnoses of seborrheic keratosis?
Treatment
What is included in the medical care of seborrheic keratosis?
What is the role of surgery in the treatment of seborrheic keratosis?
Which specialist consultation are needed for the treatment of seborrheic keratosis?
Which activity restrictions are used in the treatment of seborrheic keratosis?
What is included in long-term monitoring of seborrheic keratosis?
Medications
Which medications are used in the treatment of seborrheic keratosis?
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Sharply circumscribed elevated seborrheic keratoses.
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Closer view of multiple seborrheic keratoses in an autosomally dominant mode of inheritance.
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Seborrheic keratoses projecting above the level of the epidermis. Cysts represent sections of hyperkeratotic follicles.
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Seborrheic keratosis showing lackluster surface and appearance of being stuck on the skin surface.
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This is an autosomal dominant form of multiple seborrheic keratoses. This man's daughter is developing a similar distribution and quantity of seborrheic keratoses.
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The back of this same patient as in the image above with multiple seborrheic keratoses. His face had a similar number of seborrheic keratoses.
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Acanthotic type of seborrheic keratosis.
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Higher-power view of the cells in an acanthotic seborrheic keratosis.
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Hyperkeratotic type of seborrheic keratosis.
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Reticulated (or adenoid) type of seborrheic keratosis.
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This is a reticulated (or adenoid) seborrheic keratosis with abundant pigment.
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Seborrheic keratosis with inflammation in the dermis.
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This seborrheic keratosis was a pedunculated lesion in an axillary fold. Clinically, it had some resemblance to a skin tag.