seborrheic keratosis

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Related to seborrheic keratosis: actinic keratosis


any horny growth, such as a wart or callosity.
actinic keratosis a sharply outlined wartlike or keratotic growth, which may develop into a cutaneous horn, and may become malignant; it usually occurs in the middle aged or elderly and is due to excessive exposure to the sun. Called also senile or solar keratosis. (See Atlas 3, Part F).
keratosis follicula´ris a slowly progressive autosomal dominant disorder of keratinization characterized by pinkish to tan or skin-colored papules on the seborrheic areas of the body that coalesce to form plaques, which may become crusted and secondarily infected; over time, the lesions may become darker and may fuse to form papillomatous and warty malodorous growths. Called also Darier's disease and Darier-White disease.
keratosis palma´ris et planta´ris palmoplantar keratoderma.
keratosis pharyn´gea horny projections from the tonsils and pharyngeal walls. Called also pharyngokeratosis.
keratosis pila´ris hyperkeratosis limited to the hair follicles.
keratosis puncta´ta a hereditary hyperkeratosis in which the lesions are localized in multiple points on the palms and soles.
seborrheic keratosis (keratosis seborrhe´ica) a benign, noninvasive tumor of epidermal origin, marked by numerous yellow or brown, sharply marginated, oval, raised lesions.
senile keratosis (solar keratosis) actinic keratosis.

seb·or·rhe·ic ker·a·to·sis

, keratosis seborrheica
superficial, benign, verrucous, often pigmented, greasy lesions consisting of proliferating epidermal cells, resembling basal cells, enclosing horn cysts; they usually occur after the third decade.

seborrheic keratosis

a benign, well-circumscribed, slightly raised, tan to black, warty lesion of the skin of the face, neck, chest, or upper back. The macules are loosely covered with a greasy crust that leaves a raw pulpy base when removed. Itching is common. Treatment includes curettage, electrodesiccation, or cryotherapy. Also called acanthoma verrucosa seborrheica, seborrheic wart.
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Seborrheic keratosis

seborrheic keratosis

Senile keratosis Dermatology A benign, often numerous lesion of the face and upper trunk of older adults, which appear as wart-like growths in various colors; SKs may become irritated and itch because of friction from clothes. See Keratosis.

seb·or·rhe·ic ker·a·to·sis

, keratosis seborrheica (seb'ōr-ē'ik ker'ă-tō'sis, seb-ōr-ē'i-kă)
1. A superficial, benign, verrucous, often pigmented, greasy lesion consisting of proliferating epidermal cells, resembling basal cells, enclosing horn cysts; usually occur after the third decade.
2. Synonym(s): senile keratosis. Synonym(s): seborrhoeic keratosis.
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seborrheic keratosis

A benign skin tumor that may be pigmented. It is composed of immature epithelial cells and is quite common in older adults. Its etiology is unknown.


Keratoid, nevoid, acanthoid, or verrucose types occur in older adults and in those with long-standing dry seborrhea, on the face, scalp, interscapular or sternal regions, and backs of the hands. The yellow, gray, or brown sharply circumscribed lesions are covered with a firmly adherent scale, greasy or velvety on the trunk or scalp but harsh, rough, and dry on the face or hands.


Thorough curettage is effective. This leaves a flat surface that becomes covered with normal skin within about 1 week. Pedunculated lesions can be removed surgically. Cautery may produce scarring and should not be used.

Synonym: wart, seborrheic See: illustration
See also: keratosis

seb·or·rhe·ic ker·a·to·sis

, keratosis seborrheica (seb'ōr-ē'ik ker'ă-tō'sis, seb-ōr-ē'i-kă)
Superficial, benign, verrucous, often pigmented, greasy lesions consisting of proliferating epidermal cells, resembling basal cells, enclosing horn cysts; usually occur after the third decade.
Synonym(s): basal cell papilloma.


affected with or of the nature of seborrhoea.

seborrheic dermatitis
see seborrheic dermatitis.
seborrheic disease
seborrheic keratosis
see seborrheic keratosis.
seborrheic plaque
chronic, erythematous, scaly skin plaque which is associated with staphylococcal hypersensitivity.
References in periodicals archive ?
Finding of Seborrheic keratosis in this study compares well with that of Grover and Narasimhalu.
To the best of our knowledge, to date, no case of SNF accompanied by an eruptive seborrheic keratosis has been reported in the literature.
Sustained Akt activity is required to maintain cell viability in seborrheic keratosis, a benign epithelial tumor.
1,2) Seborrheic keratosis should be included in the differential diagnosis of auricle lesions, but this fact has not been made adequately clear in the otolaryngologic literature.
Most commonly, they are single and arise from a seborrheic keratosis lesion.
A case of omphalith in a patient with seborrheic keratosis of the umbilicus.
Age, y/Sex Site Diagnosis 4 17/F Cheek Folliculitis 10 55/F Leg Basal cell carcinoma 38 37/F Cheek Fibrous papule 45 38/F Back Solar lentigo 105 75/F Arm Scar 113 69/M Finger Actinic keratosis 125 40/F Unknown Basal cell carcinoma 160 69/M Canthus Ruptured cyst 189 44/F Chest Hemangioma 225 70/F Nose Seborrheic keratosis 296 64/M Forehead Basal cell carcinoma 307 46/M Forehead Basal cell carcinoma 345 72/M Breast Verrucous keratosis 346 77/F Breast Benign lichenoid keratosis 407 67/F Cheek Actinic keratosis 432 44/F Neck Syringoma 447 37/F Shoulder Benign lichenoid keratosis 472 56/F Nose Fibrous papule 479 42/F Shoulder Nevus Case No.
If a malignant melanoma occurs later, a lawsuit could argue that a destroyed seborrheic keratosis was the primary site.
Resultant changes can include actinic keratosis, seborrheic keratosis, dermatoheliosis, and solar lentigines.
Worldwide studies performed so far viz Iowa study spanning a 38 years period, [1] a study in southern Taiwan [2] over a period of 5 years and many more, and other studies done individually for different types of lid tumors have characterized; amongst benign tumors seborrheic keratosis, epithelial cysts as commoner entities and amongst the malignant tumors basal cell carcinoma as the most prevalent followed by sebaceous gland and then squamous cell carcinoma.
Actinic keratosis was found in 2 patients and one patient had seborrheic keratosis with suspicious lesions.
Sign of Leser-TrACopyrightlat (SLT) is defined by sudden eruption of numerous seborrheic keratosis or rapid increase in the number of pre-existing seborrheic keratosis.