Describing Tinea Corporis (Ringworm) in the HPI
Describe the lesion as an annular (ring-shaped), erythematous plaque with a raised, scaly, advancing border and central clearing, noting the specific location on the abdomen, size in centimeters, and presence or absence of pruritus.
Essential Descriptive Elements
When documenting tinea corporis in your HPI, include these specific morphologic features:
Primary Lesion Characteristics
- Shape: Annular (circular or oval) configuration with well-demarcated borders 1
- Border: Raised, scaly, erythematous leading edge that advances centrifugally 1, 2
- Center: Central clearing or less active center compared to the periphery 2
- Color: Mildly erythematous to pink 1
- Surface: Scaly patches or plaques, sharply circumscribed 1
Additional Clinical Details to Document
- Size: Measure and record diameter in centimeters
- Location: Specific anatomic site (e.g., "right upper abdomen")
- Number: Single versus multiple lesions
- Symptoms: Presence and severity of pruritus (mild pruritus is common) 1
- Distribution pattern: Note if lesions are discrete or confluent
Important Caveats
Be aware that atypical presentations exist that may complicate your description 3. These can include:
- Vesicles or pustules at the border
- Bullous lesions in severe inflammatory cases
- Absence of the classic annular pattern
Prior medication use significantly alters appearance 1, 4. If the patient has used:
- Topical corticosteroids: May mask typical features, creating diagnostic confusion
- Calcineurin inhibitors: Can modify the classic presentation
- Combination antifungal-corticosteroid products: Alter morphology and should be documented
Clinical Documentation Example
A well-documented HPI might read: "Patient presents with a 2-week history of a pruritic, 4 cm annular, erythematous plaque on the right upper abdomen with a raised, scaly border and central clearing. No prior topical treatments applied."
This description provides the morphologic detail needed for clinical decision-making while documenting key features that support the diagnosis of tinea corporis and guide appropriate diagnostic testing (KOH preparation from the active border) 1, 4.