View source for Seborrheic keratosis

==Background==
{{Skin anatomy background images}}
*In itself benign, no treatment necessary

==Clinical Features==
[[File:Seborrheic keratosis on human back.jpg|thumb|Multiple seborrheic keratoses on the dorsum of a patient with Leser–Trélat sign.]]
* Light tan to black [[rash]]
* Round, oval
* Flat to elevated, verrucous
* Velvety, waxy, "stuck-on" appearance

===Leser-Trelat Sign<ref>Schwartz RA et al. Sign of Leser-Trelat Clinical Presentation. eMedicine. Jun 18, 2015. http://emedicine.medscape.com/article/1097299-overview.</ref>===
[[File:leser trelat.gif|thumb|[[Seborrheic keratosis]]]]
*'''Requires follow up for malignancy workup'''
*New onset diffuse lesions
*Tends towards trunk by may involve:
**Neck
**Axilla
**Groin
*Associated with other paraneoplastic derm signs:
**Malignant [[acanthosis nigricans]] (more classically associated with internal malignancy)
**Florid cutaneous papillomatosis
**Eruptive capillary angiomas

==Differential Diagnosis==
{{DDX dark raised lesions}}

==Evaluation==


==Management==


==Disposition==


==See Also==
*[[General approach to rashes]]

==External Links==

==References==
<references/>

[[Category:Dermatology]]