Chancriform pyoderma: causes, symptoms, diagnosis, and treatment

Chancriform pyoderma is an infectious skin disease characterized by superficial button ulcer, generally in adults, often in the face, especially in the periocular area, and external genitals.


Coagulase-positive staphylococcus aureus and staphylococcus albus can be cultured in the lesion.

Signs and Symptoms

A papule and pustule occurs initially and gradually enlarges. After rupture, a superficial, round or oval, 1 - 4 cm in diameter, dark red, shiny chancriform ulcer is formed, with serous secretions in the base of the ulcer, sometimes with yellow purulent crust. Solitary lesion is present, without subjective symptoms, and the regional lymph nodes are swollen, with tenderness. Chancriform pyoderma persists for 2 weeks to several months, usually 4 - 8 weeks, leaving superficial scars after healing. Recurrence may be present. Negative results are present in dark-field examinations of spirochetes and syphilis serum tests.


On the basis of clinical findings, such as button ulcer, negative results in spirochetes and syphilis serum tests, diagnosis is not difficult.


Systemic antibiotics can be administered.