cutaneous horn


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cu·ta·ne·ous horn

a protruding keratotic growth of the skin; the base may show changes of actinic keratosis or carcinoma.

cutaneous horn

a protruding keratotic growth of the skin, the base of which may show changes of actinic keratosis or carcinoma.
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Cutaneous horn

cutaneous horn

A focal hyperkeratotic column arising in head, neck, face and the penis, in the background of a keratinising proliferation—e.g., solar, seborrhoeic, or inverted follicular keratosis; marsupialised tricholemmal or epidermoid cysts; verruca vulgaris; and squamous cell carcinoma or sebaceous gland carcinoma.

cutaneous horn

Dermatology A focal hyperkeratosis seen in solar, seborrheic, or inverted follicular keratoses, in marsupialized tricholemmal or epidermoid cysts, verruca vulgaris, and in SCC or sebaceous gland carcinoma.

cu·ta·ne·ous horn

(kyū-tā'nē-ŭs hōrn)
A protruding keratotic growth of the skin; the base may show changes of actinic keratosis or carcinoma.

horn

1. a pointed projection.
2. the processes carried on the foreheads of most ruminants and rhinoceroses including skin-covered bony knobs in giraffes, velvet-covered branched deciduous bony antlers of deer, branched deciduous keratinized processes in pronghorns and the familiar hollow horns of bovids. In these a horny sheath is composed of keratinized epithelial cells borne on a fibrous corium that is carried on a cornual process, an extension of the frontal bone. In mature cattle the cavity of the frontal sinus extends into the cornual process. Called also fighting horns.
Cattle and buffalo horns are classed as shorthorn (short, in-curving), lyre (see lyrate), crescent or sickle (large, inward curving, downward inclined), long (long, handlebar configuration).

horn aging
telling the age of a cattle beast by counting the rings at the base and adding one. Can give a guide but can also mislead. It is also capable of being faked and even obliterated by rasping or by dehorning.
horn amputation
horn button
immature horn on the frontal bone of very young ruminants. Called also horn bud.
horn core cancer, horn cancer
is a squamous cell carcinoma of the mucosa of the frontal sinus which invades the horn core usually resulting in dehiscence of the horn. Has a very high prevalence in adult male cattle in India.
cicatricial horn
a hard, dry outgrowth from a cicatrix, commonly scaly and rarely osseous.
cutaneous horn
single or multiple firm projections ('horns') of keratin on the skin or footpads. They may originate from papillomas, keratoses or various skin tumors, particularly intracutaneous cornifying epithelioma, or in association with dermatophilosis or feline leukemia virus infection.
dorsal horn of spinal cord
the horn-shaped structure seen in transverse section of the spinal cord, formed by the dorsal column of the cord.
horn fly
see haematobiairritans.
horn nerve block
see cornual nerve block.
overgrown horn
malaligned shorthorn type horns which curve in too far and penetrate the skull, usually into a frontal sinus.
horn paste
made of hoof raspings mixed with lard. Packed into the clefts beside the bars of the sole in the horse's foot before the taking of a radiograph; avoids the misleading opacities created by the clefts on radiographs. Now usually replaced by Playdo.
horn pearls
microscopic structures found in some neoplasms of epithelial origin. Called also squamous or keratin pearls.
sebaceous horn
a hard outgrowth of the contents of a sebaceous cyst.
horn shears
devices used for removing horns. Most work as a guillotine and provide great leverage for cutting the horns at the base where a rim of skin can be included.
horn tubule
basic structural element in many horny outgrowths; produced by a dermal papilla, it bears some resemblance to a hair and grows approximately vertical to the dermal surface; it is united by intertubular horn to neighboring tubules.
ventral horn cell diseases
motor neuron diseases; rare in animals, but hereditary spinal muscular atrophy of Brittany spaniels is an example.
ventral horn of spinal cord
the horn-shaped structure seen in transverse section of the spinal cord, formed by the ventral column of the cord.
warty horn
a hard, pointed outgrowth of a wart.
References in periodicals archive ?
6 Our patient is unique since he presented with a cutaneous horn which (to the best of our knowledge) has not been described with trichofolliculoma before.
A case of cutaneous horn originating from keratoacanthoma.
Arvas L, Livaoglu M, Karacal N, Sozen E, Kara B: Giant cutaneous horn with naevus sebaceus.
Akan M, Yildirim S, Avci G, Akoz T: Xeroderma pigmentosum with a giant cutaneous horn.
TABLE Some causes of cutaneous horn Benign--noninfectious Angiokeratoma Angioma Dermatofibroma Epidermal inclusion cyst ("sebaceous cyst") Linear verrucous epidermal nevus Fibroma Lichen simplex chronicus ("neurodermatitis") Lichenoid keratosis Prurigo nodularis Pyogenic granuloma Sebaceous adenoma Seborrheic keratosis Trichilemma Benign--infectious Condyloma acuminata (genital warts) Molluscum contagiosum Verruca vulgaris (common wart) Premalignant/malignant Actinic keratosis Basal cell carcinoma Bowen's disease Epidermoid carcinoma Kaposi's sarcoma Keratoacanthoma Malignant melanoma Squamous cell carcinoma Sources: Gould and Brodell 1999, (1) Akan et al 2001, (6) Khaitan 1999.
Stavroulaki P, Mal RIL Squamous cell carcinoma presenting as a cutaneous horn.
Various lesions seen at the base of a cutaneous horn include squamous cell carcinoma, actinic keratosis, keratoacanthoma, Bowen's disease, seborrheic keratosis, basal cell carcinoma, hemangioma, keratotic and micaeous pseudopapillomatous balanitis, Kaposi's sarcoma, sebaceous adenoma and Paget's disease of the female breast.
Microscopically, a cutaneous horn shows marked hyperkeratosis, acanthosis, dyskeratosis, papillomatosis and chronic inflammatory infiltration of the adjacent dermis.
Cutaneous horn (cornu cutaneum) is a relatively rare nodular skin lesion and comprises of keratised material organised in the shape of an animal horn.
Cutaneous horn is believed to result from unusual cohesiveness of keratinized material from the superficial layers of thhe skin(startum corneum) or implanted deeply in the cutis.
Clinical diagnosis of cutaneous horn over seborrheic keratosis or actinic keratosis was made.
CONCLUSION: Cutaneous horn is a relatively potential malignant tumour.