Chronic atrophic dermatitis

Introduction to chronic atrophic limb dermatitis Chronic atrophic dermatitis (acrodermatitis chronicicaatrophicans), also known as primary diffuse atrophy (primarydiffuseatrophy), or progressive disseminated atrophic dermatitis (dermatitisatrophicansdiffusaprogressiva), is a chronic extensive skin atrophy on the extremities of the extremities. Skin lesions are concentrically distributed single or multiple red subcutaneous nodules or plaques. Later expanded or increased, or can be fused into diffuse infiltrative edematous plaques, reddish or dark red. Gradually expand the center to show atrophy, skin is thin, loose wrinkles, subcutaneous superficial veins are faintly visible, sweat glands, sebaceous glands due to atrophy and dysfunction, dry skin, sputum-like scales, capillary reduction. basic knowledge The proportion of illness: 0.0005% Susceptible people: no special people Mode of infection: non-infectious Complications: edema

Causes of chronic atrophic limb dermatitis

Temperature (30%):

It is not clear, according to the geographical distribution characteristics, it is believed that the cold area is related to the pathogenesis of this disease. Hauser believes that ixodes rieinus is the medium for transmitting this disease, but also believes that the blood circulation is poor, trauma or neurological dysfunction The occurrence of the disease has a certain impact.

Pathogenesis

The pathogenesis is still unclear. Some people think that serum cryoglobulinemia, 1, 2, gamma globulin is elevated, blood viscosity is positively correlated with the onset of the disease, and there are also thoughts of poor blood circulation, trauma or neurological dysfunction. The occurrence of the disease has a certain impact.

Prevention of chronic atrophic limb dermatitis

1. Adjust daily life and workload, and regularly carry out activities and exercise to avoid fatigue.

Chronic atrophic dermatitis complications Complications edema

Lower extremities can be associated with chronic ulcers or ulceration.

Chronic atrophic limb dermatitis symptoms Common symptoms Dry skin subcutaneous nodules squamous cystic plaque

Skin lesions are concentrically distributed in single or multiple red subcutaneous nodules or plaques, which may later enlarge or increase, or may merge into diffuse infiltrative edematous plaques, with a reddish or dark red color, gradually expanding to atrophy in the center. The skin is thin, loose and wrinkled, and the subcutaneous superficial veins are faintly visible. The sweat glands and sebaceous glands are reduced in function due to atrophy, the skin is dry, there are squamous scales, the capillaries are reduced, and the lesions are arranged in a sequence along the ulna or the tibia. Atrophic banded scleroderma, with heterochromatic or pale leukoplakia changes, some of which appear fibrosis or sclerosis, surrounding soft tissue may be accompanied by calcium deposition, and yellowish fibrous hyperplasia hard nodules may occur near the joints of the extremities. If there is tenderness, such as damage to the surrounding blush, it may be accompanied by local lymphadenopathy. If it is in the lower limbs, it may be accompanied by chronic ulcer or ulceration. In severe cases, the affected limb muscles and bones may shrink and cause dysfunction. , often invading the back of the hands and feet, gradually expanding, can affect the limbs and large joints, more women than men, after a slow, rare self-healing tendency.

Examination of chronic atrophic dermatitis

In addition to serum condensation test and blood viscosity measurement, X-ray films showed extensive calcification of soft tissues, severe decalcification of bones and joints, atrophy or abnormal changes of spinal joint stiffness, dislocation or fusion.

Histopathology: dermal edema, atrophy of epidermis atrophy, lymphoid tissue under the subepithelial connective tissue, banded infiltration of tissue cells, thickening of dermis fibers, hyaline degeneration of collagen fibers, atrophy of sebaceous glands and hair follicles, sweat glands presence.

Diagnosis and differentiation of chronic atrophic limb dermatitis

1. Localized scleroderma is characterized by skin edema and sclerosis, and the atrophic phase is a non-inflammatory result.

2. Chronic radiation dermatitis Although the skin atrophy is visible, the telangiectasia is visible, but the history of X-ray exposure is specific.

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