Seborrheic Keratosis, sometimes called senile wart, is a non-cancerous condition that occurs as a light brown, black or tan growth on the surface of the skin. These are usually harmless but may sometimes get irritated or be aesthetically unappealing. They can be removed, if necessary.
· These lesions are slightly elevated
· They are waxy and scaly
· They can appear in all areas of the body except for the palms and soles
· They often occur later in life and usually in multiples
· Many times, it has a stuck, “pasted on” appearance
Dermatosis papulosa nigra
Dermatosis paulosa nigra is a condition that occurs mainly in darker skin types and usually starts to form in adolescence. The lesions are small, darkly pigmented papules that are harmless and generally don’t require treatment.
· It appears mainly on cheeks and foreheads
· It often occurs in multiples
· This lesion has a smooth surface
· It appears most likely in an old age
Stucco keratosis is another harmless skin condition among common skin lesions with the following characteristics:
· It consists of small, white-gray papules
· It appears mostly on the ankles or feet
· Men are more likely to have it
· It is more common among fair-skinned individuals
Skin tags (acrochordons)
Skin tags or acrochordons are soft skin growths where a narrow papule sticks out of the skin from a short piece of flesh like a tag.
· They are fleshy
· They often occur on the eyelids, neck, groin or armpit
· They can become irritated if twisted or rubbed a lot
· They are harmless but can be removed for cosmetic reasons
Cherry angiomas are red papules filled with blood vessels made up of capillaries at the surface of the skin.
· They usually develop after the age of 40 and increase in number over time.
· They occur in higher concentrations on the trunk of the body.
· They may resemble melanoma when they bleed or clot.
· They do not require treatment, unless for cosmetic reasons.
Dermatofibroma is a benign skin tumor that appears as a firm, round, brownish to red-purple growth usually found on the legs.
· It feels like a hard lump under the skin
· When squeezed, it dimples since the lesion is tethered to lower layers of the epidermis.
· It initially has a red color, later changing to brown
· It is dome-shaped
· It usually has a darker peripheral rim
· It is often a result of a prior injury
Solar lentigos, also known as “sun spots” or “age spots,” are marks on the skin from sun damage that are not cancerous. Although no treatment is required, patients are often at an increased risk for skin cancer and need to exercise precaution.
Sebaceous hyperplasia is a skin condition that occurs when sebaceous gland on the skin is enlarged.
· It appears as small, skin-colored to yellow papules with a central indent
· These papules often occur on the forehead and central face
· They can often resemble basal cell carcinoma, but they rarely bleed or crust
· Removal is not necessary, unless for cosmetic reasons
Epidermal inclusion cyst (EIC)
An epidermal inclusion cyst is a common skin cyst, sometimes called sebaceous cyst, even though it arises from hair follicles, not oil glands. The cyst contains a foul-smelling, cheese-like substance formed from degenerating keratinocytes.
They can become red and aggravated if the substance enters the dermis, an occurrence which is often mistaken for an infection. Asymptomatic cysts don’t require treatment. Excision can be used to remove a cyst if desired.
Milia or tiny epidermoid cysts
Milia or tiny epidermoid cysts is a condition where small 1-2 mm white to yellow papules occur underneath the surface of the skin.
· These cysts can occur in all ages
· They can be extracted without scarring
· They are fixed and long-lasting
· They often occur on the cheeks, eyelids, forehead, and genitalia.
Lipomas are collections of fat under the skin. These common skin lesions are soft and mobile benign tumors that usually stop growing when they reach a few centimeters in diameter. Treatment is surgical and considered elective.
· They often appear on the trunk, arms, or thighs
· They tend to occur in multiples in early adulthood
Images courtesy of the American Academy of Dermatology