Common benign tumor of the epidermis
Formed from proliferation of keratinocytes
Frequently appears in multiples on the head, neck, and trunk of older individuals but may occur on any h...
Typically begin as oval- or round-shaped...
Treatment is not usually necessary due to the benign nature of the lesions.
Removal of seborrheic keratoses may be indicated if
Symptomatic (e.g., easily irritated, gets caught on clothing or ...
Inflammation or irritation develops
There is a change in appearance
New seborrh...
Culbertson GR. 532-nm diode laser treatment of seborrheic keratoses with color enhancement. Dermatol Surg. 2008;34(4):525–528.
Draelos ZD, Rizer RL, Trookman NS. A comparison o...
L82.1 Other seborrheic keratosis
L82.0 Inflamed seborrheic keratosis
702.19 Other seborrheic keratosis
702.11 Inflamed seborrheic keratosis
398838000 senile hyperkeratosis (disorder)
4...
Seborrheic keratoses are one of the most common benign tumors of the epidermis.
Prevalence increases with age.
Underlying internal malignancy should be considered if large numbers of seb...
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Figure 10.46. Seborrheic keratosis. Typical appearance of a flat, elevated plaque that appears \"stuck on.\" The lesion does not have deep extensions through the skin.
Figure 10.46. Seborrheic keratosis. Typical appearance of a flat, elevated plaque that appears \"stuck on.\" The lesion does not have deep...
<bold><italic>Figure 24-27</bold> Seborrheic keratosis. A‚</bold> This plaque is brown‚ dry‚ uniformly pigmented‚ sharply demarcated‚ and smoothly outlined. <bold>B‚</bold> The microscopic study shows a superficial proliferation of basal cells with small cysts of keratin.
<bold><italic>Figure 24-27</bold> Seborrheic keratosis. A‚</bold> This plaque is brown‚ dry&...
seborrheic keratosis
<b>FIGURE 24-75. Seborrheic keratosis.</b> Broad anastomosing cords of mature stratified squamous epithelium are associated with small keratin cysts.
<b>FIGURE 24-75. Seborrheic keratosis.</b> Broad anastomosing cords of mature stratified squamous epithelium are associated wi...
actinic keratosis: numerous keratoses over te scalp induced by chronic ultra-voilet exposure
Actinic keratosis
Actinic Keratosis Actinic keratoses are superficial, flattened papules covered by a dry scale. Often multiple, they may be round or irregular, and are pink, tan, or grayish. They appear on sun-exposed skin of older, fair-skinned persons. Though themselves benign, these lesions may give rise to squamous cell carcinoma (suggested by rapid growth, induration, redness at the base, and ulceration). Keratoses on face and hand, typical locations, are shown.
Actinic Keratosis Actinic keratoses are superficial, flattened papules covered by a dry scale. Often multiple, they may be round or irregu...