Follicular scaly keratosis

Introduction The disease is regional, more common in Asia, and rare in Europe and the Americas. More common in young adults, more women. The rash is a small finger cover to the big money scattered in a round gray-white scaly plaque, the center is fixed, the periphery is free, the central can be seen in the same black hair follicle angle with the hair follicle, can be accompanied by a light halo. Peel off the scales and see the horny plugs and curled bristles that are stuck in the mouth of the hair follicle. This can then regenerate the same scale spots. Multiple symmetry occurs in the waist, hips, chest and abdomen and the outside of the thigh.

Cause

There is a great correlation between the occurrence of hair follicle keratosis and heredity, which is called physique. For the cause of the disease, most of the literature believes that the disease has a genetic predisposition (common in patients with ichthyosis), and occurs in people with allergic or atopic physique, or malnourished (especially those with vitamin A deficiency) . If the environment is low in humidity, air is dry, and certain irritants such as tar and oil may cause the disease.

an examination

Related inspection

Skin lesion

Diagnostic points:

1. More common in adults, both sexes can be combined.

2. Occurs in the underarms, side chest, buttocks and thighs, symmetric distribution.

3. The lesion is centered on the hair follicle, and it is black-pointed and keratinized. The center is attached to the hair follicle, and the outer part is outwardly stretched into a circular scale-like keratinized patch of 5-6 mm. The edge is lifted, and the pigment is slightly shallow.

4. No symptoms.

5. In a chronic course, some can subside.

Differential diagnosis

Keratosis

The disease is an autosomal dominant hereditary disease with keratotic papules at the mouth of the hair follicle and containing mane. The cause is unknown, taking hormone drugs is easy to suffer from this disease, the disease is closely related to endocrine. The disease and ichthyosis can be concurrent. The primary rash is a horny hair with a large needle tip that is consistent with the hair follicle. If the angle plug is forcibly removed, a cup-shaped depression is seen, but it quickly returns to its original state.

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