Primary yaws

Definition

The initial or primary lesion (‘mother yaw’) appears at the site of inoculation on an exposed part of the body 2–12 weeks after inoculation. It usually starts as a localized papule, which may develop into a large nodule 2–5 cm in diameter that ulcerates. Ulcers are usually non-tender and have a characteristic granular surface reminiscent of a raspberry (hence the name ‘framboesia’). Ulcers often exude a yellow discharge that may dry to form a crust. The primary lesion is most commonly found on the legs and ankles (65 to 85% of cases), but may be on the buttocks, arms, hands, and face. It usually heals after 3–6 months, regressing into a pitted scar with dark margins, and only in a small proportion of patients (9-15%) does the primary lesion persist at the onset of the secondary stage.

Inclusions

• Chancre of yaws
• Primary framboesia

Index Terms