With this term, parapsoriasis , it is customary to designate a group of specific dermatoses that are transmitted mainly by inheritance. The disease is superficial and affects the upper layers of the epidermis. Parapsoriasis is predominantly chronic in nature, does not have general phenomena and subjective sensations, and has a tendency to resist therapeutic treatment. The factors determining the onset of the disease have not yet been established. Sometimes infectious or allergic infectious causes of the disease can be traced. It is known that the severe development of the disease can be accompanied by various infectious diseases.  

Types of parapsoriasis

Teardrop parapsoriaz . It is also called chronic lichenoid lichen and nodular psoriasiform dermatitis. This type of disease in women occurs about 2 times more often than in the strong sex. Typical for adolescents and middle-aged people. This type of psoriasis is extremely rare in children. 

With guttate parapsoriasis, the skin is suddenly covered with many papules ranging in size from 3 to 4 millimeters. Papules are pale pink or brown in color. In the center of the papule there is a firmly seated brownish scale, which, when removed, takes the form of a shell. During light scraping, a slight peeling forms on the surface of the papules , and with intense scraping, punctate hemorrhages form.

Lichenoid parapsoriasis . This type of dermatosis has another name – variegated or reticular parakeratosis. The risk group most often includes adults of both sexes. Children are rarely affected by the disease.

Plaque parapsoriasis usually occurs in people of retirement or middle age. Men are more susceptible to it than women. Plaque parapsoriasis arises and develops as follows. The skin on the limbs (upper and lower), trunk (back, belly, chest), and most often the lateral surfaces begins to become covered with rounded spots of gray-pink color with a brown tint. The edges of the lesions are clearly defined. No seepage into the system is detected. Atrophy of the skin in the lesions is not observed. It can take many years for the development of psoriatic plaques to regress.   

Acute type of parapsoriasis . It is also called Fly Habermann ‘s disease , acute lichenoid and varioliform lichen. The disease affects adults of both sexes. Distinctive features of acute parapsoriasis are manifold changes on the skin. Simultaneously with rashes similar to a rash with teardrop-shaped psoriasis, bleeding in papules, bloody crusts with dead elements, as well as varicella-like vesicular elements are revealed .

A couple of weeks after the regression procedures, spots and depleted scars remain at the site of the former inflammations. Sometimes the disease drags on and turns into a drop-shaped type.

Diagnosis and treatment of parapsoriasis

Pathological changes in skin tissues in the disease are not determined. A distinctive diagnostic test should be carried out along with psoriasis, papular syphilis , lichen planus, seborrheic dermatitis, chickenpox, etc. The life prognosis for the disease is positive. At least once every six months, the patient needs to be examined by a dermatologist.

There are no generally accepted treatments for the disease. With the drop-shaped type of parapsoriasis, sanitation of the foci of infection is prescribed. Usually they prescribe widely acting antibiotics, hyposensitizing , antihistamines, vascular drugs. In the chronic form of the disease , which is at the stage of resolution, PUVA therapy shows good results.

With plaque , as well as lichenoid types of this skin disease, the same therapeutic therapies are carried out as with guttate parapsoriasis , although in this case the disease is much more difficult to treat.

If the result from the above treatment is not effective enough, as well as in the acute type of parapsoriasis, the patient must be prescribed low doses of glucocorticosteroids . For local therapy, local glucocorticosteroids , moisturizing medicinal creams, and absorbable ointments are used.

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