Diseases of the skin and subcutaneous tissue (dermatology)

Gangrenous pyoderma

Gangrenous pyoderma is a chronic, progressive skin necrosis of unknown etiology, often associated with a systemic disease.

Cutaneous leishmaniasis: causes, symptoms, diagnosis, treatment

Cutaneous leishmaniasis (synonyms: Old World leishmaniasis, Borovsky's disease) is an endemic transmission disease, occurring mainly in countries with hot and warm climates, and manifested mainly by skin lesions.

Mastocytosis (urticaria pigmentosa)

Mastocytosis (synonym: urticaria pigmentosa) is a disease based on the accumulation of mast cells in various organs and tissues, including the skin. Clinical manifestations of mastocytosis are caused by the release of biologically active substances during mast cell degranulation.

Keloid and hypertrophic scars: causes, symptoms, diagnosis, treatment

The causes of keloid and hypertrophic scars are unknown. Scars usually appear at the site of skin damage - after surgery, cryo- or electrodestruction, at the site of wounds, abrasions, common acne. They can also appear spontaneously, usually in the anterior chest area.

Retinal livedo (Melkersson-Rosenthal syndrome): causes, symptoms, diagnosis, treatment

Livedo reticularis (Melkerson-Rosenthal syndrome) was first described in 1928 by Melkersson. He observed a patient with recurrent facial nerve paresis and persistent lip edema, and in 1931 Rosenthal added a third symptom - folded or scrotal tongue.

Livedo: causes, symptoms, diagnosis, treatment

Levido is not a disease, but a peculiar reaction of the skin to one or another effect. In the development of levido, a period of hyperemia (initial stage) and a period of pigmentation are distinguished. Levido can remain unchanged for many years. Subjective sensations are absent.

Trophic ulcers

Trophic ulcers often occur in older people due to acute or chronic venous or arterial insufficiency, more often in women. Varicose, ischemic and neurotrophic ulcers are distinguished.

Angiokeratoma: causes, symptoms, diagnosis, treatment

Angiokeratoma occurs due to epithelial bulging and the formation of subepidermal expansions of capillary cavities, which is accompanied by reactive changes in the epidermis.

Vasculitides of the skin

Vasculitis (synonym: cutaneous angiitis) is a skin disease in the clinical and pathomorphological picture of which the initial and leading link is non-specific inflammation of the walls of skin vessels of different calibers.

Cheilitis

Cheilitis is a chronic, often inflammatory disease of the lips of various etiologies and pathogenesis. Among them, there are diseases in which changes in the lips are only one of the symptoms of known dermatitis. These include atopic cheilitis, lip eczema, etc.