Table 1.
Clinical Risk Factors for Recurrence | |
---|---|
Size and location of lesion * | ≥20 mm on area L ≥10 mm on area M ≥6 mm on area H |
Undefined borders | |
Recurrent lesion | |
SOTRs ** | |
Previous radiotherapy or site of chronic inflammation | |
Rapidly growing lesion | |
Neurological symptoms | |
Pathological risk factors for recurrence | |
Not clearly differentiated lesion | |
Adenoid, adenosquamous, or desmoplastic subtypes | |
Clark level ≥IV | |
Modified Breslow thickness ≥4 mm | |
Perineural and/or vascular involvement |
* Area H: high risk of recurrence mask areas of face, ears, genitalia, hands, and feet; area M: middle risk of recurrence, cheeks, forehead, neck, and scalp; area L: low risk of recurrence, trunk and extremities. ** SOTRs, solid organ transplant recipients.