What Are The Diagnostic Methods For Psoriasis?

How to check for psoriasis? In addition to the symptoms, many laboratory tests can accurately diagnose psoriasis. Only when diagnosis is confirmed, psoriasis is no exception. The following is an introduction to psoriasis. What are the diagnostic methods?
1, skin biopsy
Skin biopsy is mainly to check the skin cells of patients with psoriasis are prolonged and thickened, dermis prolonged and edema, granule disappeared, parakeratosis, MUNRO microabscess. Psoriasis is in the epidermis, and skin biopsy in patients with psoriasis can identify the type of skin lesions in patients with psoriasis and play a guiding role in the topical drugs used in the treatment. Therefore, patients with psoriasis undergo skin cells. The check is very useful.
2, light microscopy
Patients with psoriasis vulgaris may have obvious, varying degrees of abnormality of nailfold microcirculation.
3, laboratory inspection
In some patients with psoriasis vulgaris, the average volume of red blood cells (MCV), mean hemoglobin (MCH), mean hemoglobin concentration (MCHC) and volume distribution width (RDW) were abnormal. The general situation is: the patient's average red blood cell volume value is significantly increased; the patient's red blood cell volume distribution width value is significantly increased; the patient's average red blood cell hemoglobin concentration value is significantly reduced; a small number of patients with an average of red blood cell hemoglobin abnormalities.
4, from the location of the disease to diagnose
The onset of psoriasis can cause skin lesions in any part of the body, such as nails and scalp. However, most of them focus on the patient's hands, feet, head, etc., and even spread along the elbows and knees to other parts of the body.
5, from the perspective of the onset of performance
Psoriasis is mainly characterized by skin damage, which is mainly covered by scales at the lesions. The skin at the lesion showed a lot of red pimples ranging from rice grains to mung beans. The papules were covered with a lot of white scales. After the scales were scraped off, a reddish translucent film was visible, and the film was scraped off to show a reddish bleeding. Point, this is a typical skin lesion in the symptoms of psoriasis.
6, from the perspective of disease development
The onset is slow and prone to recurrence. There is obvious seasonality, generally winter and heavy summer.
7, from the family history
Psoriasis is a hereditary disease. If you have psoriasis in your relatives, you are likely to have a susceptibility gene for psoriasis, but not necessarily psoriasis, so in daily life. Must pay attention to the stimulation of external conditions, so as not to cause psoriasis. There is a much higher chance of having a family history of psoriasis.
About the diagnosis and diagnosis of these types of psoriasis
01, joint type psoriasis
Articular psoriasis often occurs simultaneously with psoriasis vulgaris or pustular psoriasis, and both large and small joints can be affected, especially the knuckles are most susceptible, and the affected joints can be swollen and painful. It is characterized by a migratory, asymmetrical, rheumatoid factor test negative.
Laboratory examination: rheumatoid factor is negative, and erythrocyte sedimentation rate can be increased.
X-ray examination: slight hypertrophy changes at the edge of affected bone joints, some patients have bone and joint destruction of rheumatoid arthritis, but often involve distal interrogation joints, such as cartilage disappearance, articular surface erosion, joint space narrowing, Soft tissue swelling, osteoporosis, etc.
02, pustular psoriasis
The main feature of pustular psoriasis is the appearance of most small pustules on the basis of psoriasis vulgaris, and it occurs repeatedly.
Laboratory examination: leukocytosis, increased erythrocyte sedimentation rate, some patients may have hypoproteinemia and hypocalcemia.
03, erythrodermic psoriasis
The erythrodermic psoriasis skin is diffusely red, dry, and covered with thin scales. It is characterized by the "skin island" formed by normal skin among diffuse skin lesions. Because most patients have a clear history of psoriasis, it is easier to diagnose.