The keratoses

The keratosis - group of diverse non-inflammatory diseases of the skin, characterized by the disturbance of the process of Rosobrazovanie (excessive development of the stratum corneum or delay the normal exfoliate). The keratoses are quite common, but their classification is developed unclear because of unclear etiology and pathogenesis of many of them. Most of keratosis is a hereditary disease. In addition, there are keratoses acquired: a) symptomatic keratoses (at illnesses of the nervous system, disorders of the functions of the endocrine glands, and blood and lymph circulation); b) professional and drug keratoses caused by arsenic, gold, tar, lubricating oils, x-ray radiation; C) keratoses associated with nutritional Hypo - and avitaminosis A, C, PP); d) keratoses observed in some forms of dermatitis (psoriasis, red ribbon inhabitants, Norwegian scabies), as well as with syphilis and gonorrhea.
Purchased keratoses are many manifestations, but, as a rule, are characterized by multiple lesions of the skin and relatively fast cure for the elimination of the cause of the disease. All hereditary keratoses characterized by chronic course and almost not respond to treatment.
Among hereditary forms most commonly found the following keratoses: ichthyosis (see), follicular keratoses (hair zoster, is a disease of Kyrle, a rare form - contagious keratosis, morrow - brook and others), keratoderma of the palms and soles. More rare parakeets, angiokeratoma MEBELI, Polycrates.
Localization all keratoses is divided into universal (ihtios, ihtiosiformnye erythroderma and others) and alopecia (keratoderma of the palms and soles, parakeets, cutaneous horn and others), and can be transitional forms.
Hair zoster is often observed in children and youth aged, flows chronically, compounded in winter. On the skin extensor surfaces of the limbs, back, abdomen appear numerous small nodules reddish in color, covered horn scales which are often found curled hairs; when stroking the skin produces the impression of a "float". Subjective sensations there. A special form of hair depriving - ulerythema (see).

the disease cirle
Fig. 1. The skin of the leg in the disease Kyrle.
keratoderma soles
Fig. 2. Keratoderma soles

The disease cirle characterized by the formation of a grayish follicular papules on the skin of limbs (Fig. 1), trunk, face. They gradually increase in size, covered tightly sitting crusts and merging to form verrucose polycyclic plaques (borodavchenko expansion).
Keratoderma of the palms and soles and often manifests itself in early childhood and gradually progresses. In the middle of the palms and heels formed symmetrically Horny layers (Fig. 2) yellowish or brown color, surrounded stand purple border. The lesion distinguished from healthy skin, the surface can be spotted painful bleeding cracks. Often the Horny layer is spread on the backs of the hands and feet - the so-called disease island Melida. Can simultaneously receive the pockets of hyperkeratosis on knees, elbows and other places in the body (keratosis type Uns - Toast).
Porokeratoses Mibelle characterized by the appearance on the skin of the trunk, limbs and face conical nodules, thick at the touch of grey color, with a horn tube in the center; rash gradually form a ring-shaped pendant to 3-4 cm in diameter with a depression in the center and Horny roller on the periphery.
Angiokeratoma Mibelle (verrucosa telangiectasia) occurs in young girls and characterized by the appearance on the rear of the fingers and toes, on the palms dot dark red knots with hyperkeratosis on the surface, reminiscent of warty growths.
Congenital polyaritony include a number of syndromes in which various forms of keratosis combined with lesions of the nervous and skeletal systems, changes in the nails, hair, teeth, and other anomalies.
Treatment: a diet rich in vitamins and fats. Vitamin a - 100 000 ME on the day, month courses with a break of several weeks; ascorbic acid 0.25 g 3 times a day; injections of vitamins B1 (5% 2 ml) and B6 (2,5% 2 ml) through day 10 times. Externally General and local baths (temperature 37-38 degrees) with starch (300 g) or baking soda (70 g) in General tub for adults, then softening ointments: 2-5% salicylic, 3-5% sulfur, salicylic, ointments containing vitamin A (50 000-100 000 ME for 1 g basis). When pronounced palmoplantar hyperkeratosis treatment can be used after hot soda baths 10-20% salicylic ointment. Treatment for a long time, with breaks. Small lesions in cosmetics can be removed with electrocautery, cryotherapy, surgical excision or curettage.
Cm. also Hyperkeratosis, Euratom senile, Cutaneous horn.

plantar civility
Fig. 1. Lenticular type plantar sipilina. Fig. 2. Ring-type plantar sipilina. Fig. 3. Wide type plantar sipilina. Fig. 4. Horny type plantar sipilina.