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Chancriform pyoderma: causes, symptoms, diagnosis, treatment
Last reviewed: 07.07.2025
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Chancriform pyoderma is a bacterial skin infection that resembles syphilitic chancre.
Causes and pathogenesis of chancroid pyoderma. The causative agent of the disease is staphylococci and streptococci. The disease develops with a decrease in the body's defenses (immunodeficiency) and irrational treatment of the underlying disease (scabies, etc.)
Symptoms of chancroid pyoderma. The disease often begins with the appearance of a blister, which, when opened, forms an erosion or ulcer. The ulcers are round or oval, the bottom is smooth, pink-red in color, with raised edges, with a slight purulent discharge. In most cases, the lesions are covered with hemorrhagic crusts of varying thickness. There may be a narrow inflammatory rim along the periphery of the lesion. The ulcers reach 1-2 cm in diameter. The ulcerative defect has a compaction at the base. However, unlike hard chancre, the dense infiltrate in chancroid pyoderma extends beyond the ulcerative defect. Subjective sensations are absent. Regional lymph nodes are dense, painless, not fused with each other and with underlying tissues. The lesion is single, but can be multiple. At the same time, patients may have other pyoderma rashes in addition to chancroid pyoderma. Staphylococci and streptococci are usually found in the discharge of erosions or ulcers. To exclude syphilis, careful examination of the discharge of ulcers for pale treponema and serological studies are necessary.
Histopathology: Marked acanthosis, edema, proliferation of lymphatic and blood vessels, perivascular and diffuse infiltrate consisting of polymorphonuclear neutrophils, eosinophils, lymphoid elements and histiocytes are noted.
Differential diagnosis. Chancroid pyoderma should be differentiated from syphilitic hard chancre, soft chancre, lymphogranuloma venereum, etc.
Treatment of chancroid pyoderma. Broad-spectrum antibiotics (Syspres, Kefzol, Cloforan, etc.), sulfonamides, locally - aniline dyes, antibacterial and antiseptic ointments are prescribed.
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