Skin Lesion Evaluation and Management

Introduction to Skin Lesion Evaluation

The American Academy of Dermatology recommends beginning with a focused history emphasizing lesion duration, evolution, symptoms, sun exposure history, personal or family history of skin cancer, and immunosuppression status, followed by systematic examination using the ABCDE criteria for melanoma and assessment for features suggesting malignancy 1, 2, 3

Documenting the timeline of lesion appearance and any changes in size, color, shape, or symptoms over weeks to months is crucial, as evolution is a key indicator of malignancy 2, 3
Identifying high-risk factors including fair skin, history of frequent sunburns, age over 50, male sex, previous skin cancers, family history of melanoma, atypical mole syndrome, giant congenital nevi, organ transplantation, and immunosuppression is essential 1, 3

Applying the ABCDE rule for melanoma detection is recommended: Asymmetry, Border irregularity, Color heterogeneity, Diameter >6 mm, and Evolution 2, 3
Using the "ugly duckling" sign to identify pigmented lesions that appear different from the patient's other moles may indicate melanoma 1

Performing complete excisional biopsy with 2 mm clinical margin and cuff of subcutaneous fat for suspected melanoma allows accurate Breslow thickness measurement and definitive diagnosis 3
Ordering complete blood count, comprehensive metabolic panel, liver function tests, and lactate dehydrogenase for melanoma staging is necessary 2

The National Comprehensive Cancer Network recommends referral to a specialist for melanoma with any lesion meeting ABCDE criteria, diameter >6 mm with recent changes, or "ugly duckling" appearance 1, 2, 3
Referral to a specialist is also recommended for basal cell carcinoma with location in H-zone of face with diameter ≥6 mm, moderate-risk location with diameter ≥10 mm, infiltrative or morpheaform histology, perineural invasion, or recurrent tumors 6

For melanoma, performing wide excision with margins of 1 cm for Breslow thickness 1-2 mm and 2-3 cm for thicker tumors is recommended 2
Routine elective lymphadenectomy is not recommended; sentinel lymph node biopsy should only be performed by experienced teams 2

Assuming a benign diagnosis based on patient age, skin type, or lesion location alone is not recommended, as melanoma occurs in all demographics and acral lentiginous melanoma affects darker-skinned individuals 1
Delaying biopsy of suspicious lesions in high-risk patients, such as those who are immunosuppressed, have previous skin cancer, or a strong family history, is not recommended 6