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Keratosis pilaris. Keratosis pilaris (KP; also follicular keratosis, lichen pilaris, or colloquially chicken skin[1]) is a common, autosomal - dominant, genetic condition of the skin's hair follicles characterized by the appearance of possibly itchy, small, gooseflesh -like bumps, with varying degrees of reddening or inflammation. [2]
The aberrant keratinization of the follicular infundibulum causes keratosis pilaris atrophicans, which is characterized by irritation and blockage of the growing hair shaft. Alopecia, fibrosis, atrophy, and shrinking of the hair bulb are caused by persistent inflammation. The possibility that the genes controlling follicular keratinization are ...
Hyperkeratosis is thickening of the stratum corneum (the outermost layer of the epidermis, or skin), often associated with the presence of an abnormal quantity of keratin, [1] and is usually accompanied by an increase in the granular layer. As the corneum layer normally varies greatly in thickness in different sites, some experience is needed ...
682.7 Cellulitis / abscess, foot. 682.9 Cellulitis / abscess, unspec. 683 Lymphadenitis, acute. 684 Impetigo. 685 Pilonidal cyst. 685.0 Pilonidal cyst w/ abscess. 685.1 Pilonidal cyst, unspec. 686 Other local infections of skin and subcutaneous tissue. 686.0 Pyoderma.
Based on clinical examination, skin biopsy. Treatment. Electrodesiccation and curettage, cryotherapy. A seborrheic keratosis is a non-cancerous (benign) skin tumour that originates from cells, namely keratinocytes, in the outer layer of the skin called the epidermis. Like liver spots, seborrheic keratoses are seen more often as people age.
A trichilemmal cyst (or pilar cyst) is a common cyst that forms from a hair follicle, most often on the scalp, and is smooth, mobile, and filled with keratin, a protein component found in hair, nails, skin, and horns. Trichilemmal cysts are clinically and histologically distinct from trichilemmal horns, hard tissue that is much rarer and not ...
Pityriasis versicolor commonly causes hypopigmentation, visible in people with dark skin tones. The symptoms of this condition include: Pale, dark tan, or pink in color, with a reddish undertone that can darken when the patient is overheated, such as in a hot shower or during/after exercise. Tanning typically makes the affected areas contrast ...
Folliculitis decalvans is an inflammation of the hair follicle that leads to bogginess or induration of involved parts of the scalp along with pustules, erosions, crusts, ulcers, and scale. [1]: 649 [2]: 760–1 It begins at a central point and spreads outward, leaving scarring, sores, and, due to the inflammation, hair loss in its wake. [3]