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Dermatofibromas [4] are hard solitary slow-growing papules (rounded bumps) that appear in a variety of colours, usually brownish to tan. They are often elevated or pedunculated . A dermatofibroma is associated with the dimple sign ; by applying lateral pressure, there is a central depression of the dermatofibroma.
Dilated blood vessels can also develop on the legs, although when they occur on the legs, they often have underlying venous reflux or "hidden varicose veins" (see Venous hypertension section below). When found on the legs, they are found specifically on the upper thigh, below the knee joint and around the ankles.
They typically measure between one to five millimeters in size, and can be skin-colored or hyperpigmented relative to your normal skin tone, says Dr. Jennifer Shastry, MD, a Northwestern Medicine ...
A papule may have a rounded, pointed or flat top, and may have a dip. [2] It can be polygonal but is never rectangular or square. [6] It can appear with a stalk, be thread-like or look warty. [3] Ulceration, oozing, bleeding or thin blood vessels may be present in a papule. [6] It can be soft or firm and its surface may be rough or smooth. [2]
Injuries can range from small to large plates composed of brown or pink, smooth or hyperkeratotic papules. [4] The most typical areas where injuries occur are the back of the feet, the toes, the legs, and the area around a venous ulcer formed in the extremities, although the latter is the rarest of all. [ 2 ]
There are numerous causes of palpable purpura, such as autoimmune diseases, drug reactions, vaccinations, and infections.The most common infectious causes are N. gonorrhoeae, S. aureus, and N. meningitides, however palpable purpura has also been caused by Mycoplasma spp., Rickettsiae, Mycobacterium, and very rarely by Treponema pallidum, Brucella spp., Yersinia, Campylobacter, and Bartonella.
While you shouldn’t try popping or squeezing your milia to remove the bumps at home, using topical exfoliating products or prescription retinoids at home may help, Dr. Garshick explains.
The second clinical pattern of NLCS is a solitary papule or nodule that typically appears later in life. It mimics a skin tag in appearance and is flesh-colored and domed. The solitary form, which has been reported on the arms, knees, ears, axillae , nose, calves, clitoris , and scalp, has no known specific distribution.