glossy moss
Introduction
Introduction to lustrous moss Lichennitidus is a chronic skin disease of unknown cause. The clinical features are small papules with a shiny needle cap size. Most of them are concentrated but not fused, which occurs in the penis, groin and lower abdomen. The disease occurs in middle-aged men. There are reports that children are not rare, histology is characteristic, and the prognosis is good. basic knowledge The proportion of illness: 0.005% Susceptible people: good for middle-aged men Mode of infection: non-infectious complication:
Cause
Luster moss cause
(1) Causes of the disease
The cause of the disease has not been clarified. In the past, it was thought to be related to tuberculosis. Some scholars existed according to certain lustrous mosses and lichen planus. The scattered small papules of some lichen planus and the papules of lustrous moss are not easy to distinguish. It is considered that lustrous moss is a variation of lichen planus, but According to their clinical and cutaneous immunopathology and histology have their own characteristics, they should still be independent diseases. Others think that this disease is a reaction caused by allergens or infections, and some people think that it is independent. Inflammatory granuloma, but not confirmed.
(two) pathogenesis
The pathogenesis is unclear. Some people think that this disease is a reaction caused by an allergen or infection, and some people think it is an independent inflammatory granuloma.
Prevention
Glossy moss prevention
Remove possible triggers and avoid local irritation.
Complication
Luster moss complications Complication
The disease belongs to granulomatous lesions. Clinically, the genitalia such as the labia, clitoris, penis, scrotum, etc. may be pseudocartilage due to blockage of lymphatic vessels. The urethra, vagina and anus may be narrowed due to scars and adhesions. Carcinogenesis and causing genital mutilation. As a result of scar formation, it can lead to obstruction of the lymphatic vessels, causing elephantiasis of the penis, scrotum and female genitals. It can also cause stenosis of the urethra, vagina, rectum or anus due to scar formation and tissue adhesion.
Symptom
Luster Moss Symptoms Common Symptoms Itching Mucosa Damages Scaling Pimples
The damage is 1~2mm in diameter, flattened slightly higher than the leather surface, solid papules, round or polygonal, normal skin color or reddish brown, yellowish brown, shiny surface, mostly gathered, but not fused, the size is never Change, no inflammation around, sometimes there are thin scales on the surface, or mild rubbing lesions, a small amount of scales can be seen, slides are pressed, showing milky white spots, skin lesions can sometimes be arranged in a ring shape, and a few cases are generalized or fusion Type, the latter skin lesions are reddish-yellow or brown-yellow plaques, covered with small scales, a small scattered rash around the visible, if trauma or scratching, can have a homomorphic reaction, occurs in the penis, foreskin, glans, scrotum, also visible in The lower abdomen, breast, abdominal wall, buttocks and knees and elbows are generally not seen on the face and scalp. The fusion type is mainly found in the limbs and skin folds, such as the neck circumference, the lower part of the woman's breast, which occurs in the lower limbs, and sometimes can be purple. Similar to progressive pigmented purpuric dermatosis, palmar palsy is rarely affected, reports of palmar luster moss are rare, manifested as symmetrical hyperkeratotic erythema, fissures and sandpaper-like damage, even See mucosal damage, small grayish white flat papules or plaques, finger (toe) nails can also be affected, appearing mediastinum, hypertrophy, embrittlement, etc., but relatively rare, after the middle can be combined with lichen planus, generally no symptoms, occasionally Itching, some even severe itching, no systemic symptoms, the course of the disease begins from the acute, after the slow, gradually increase, can self-resolved, but easy to relapse.
Examine
Glossy moss check
Histopathology: characteristic, the dermal papilla has a focal infiltration of lymphocytes and histiocytes, and a small amount of fibroblasts, phagocytic cells, epithelioid cells, occasionally Langhans giant cells, and no cheese-like necrosis are observed. The boundary is clear, and the epidermis protrudes downward on both sides, and the infiltrating cells are spheroidal. In the infiltrating foci, the collagen fibers are destroyed, the elastic fibers disappear, the telangiectasia can be expanded, the blood vessel wall can be thickened, and sometimes the blood vessels can be occluded. The focal epidermal skin becomes thinner and the basal layer liquefies or disappears.
Diagnosis
Diagnostic identification of luster moss
According to the clinical manifestations, the characteristics of skin lesions and histopathological features can be diagnosed.
Differential diagnosis
1. Lichen planus: The two often occur in combination, and the clinical manifestations are similar. The identification points are shown in Table 1.
2. Tuberculous moss: mainly in the trunk, conical small papules, more consistent with hair follicles, clusters integrated tablets, often found in the body tuberculosis, histopathology like tuberculosis-like focal infiltration, but no telangiectasia, There is no change in the basal layer.
3. Hair Moss: It occurs mostly on the extremities of the extremities. The papules are consistent with the hair follicles, and the surface has keratinized scales, which often have curly manes.
