Pigmented purpuric lichenoid dermatosis
Introduction
Introduction to pigmented purpuric mossy skin disease Pigmented purpuric mossy skin disease, also known as Gougerot-Blum disease, is associated with rosacea-like vasoactive purpura, a chronic disease of unknown etiology. Often found in the calf, reddish brown small papular purpura, merged into a well-defined mossy patch. basic knowledge Sickness ratio: 0.1% Susceptible people: no special people Mode of infection: non-infectious complication:
Cause
Causes of pigmented purpuric mossy skin disease
(1) Causes of the disease
The cause of this disease is unknown, similar to Schamberg's disease, and it is considered to be an allergic disease caused by focal infection.
(two) pathogenesis
The pathogenesis is still unclear. The pathology is roughly the same as progressive pigmentary purpuric dermatosis, moderate lymphocytic infiltration of the upper dermis and hemosiderin deposition, small blood vessel dilation, and endothelial cell proliferation.
Prevention
Prevention of pigmented purpuric mossy skin disease
Prevent possible causes, early diagnosis, and early treatment.
Complication
Complications of pigmented purpuric mossy skin disease Complication
There is no special comorbidity in this disease.
Symptom
Pigmented purpuric mossy skin disease symptoms common symptoms scaly papules itching
Initially 0.25 ~ 2mm scattered, smooth surface, round or polygonal papules, often purpuric, bright red to brown red, and finally evolved into a tan, the pressure does not fade, the surface of which can be seen red spots or telangiectasia, there are Or no scales, often arranged in clusters, sometimes fused to form irregular patches of margins, at this time the edges are more fuzzy, often accompanied by obvious itching, generally occurring symmetrically in the lower leg, the lower part of the thigh and the trunk, can also occur in the buttocks. But does not invade the face, chest and mucous membranes.
Examine
Examination of pigmented purpuric mossy skin disease
There were no abnormal findings in laboratory tests.
Diagnosis
Diagnosis and differentiation of pigmented purpuric mossy skin disease
According to the clinical features of rust-colored lichen-like purpuric papules, it is not difficult to diagnose.
Need to identify the progressive pigmentary purpuric dermatosis and telangiectasia ring purpura.
