Importance Nodular melanoma (NM) is a rapidly progressing potentially lethal skin tumor for which early diagnosis is critical.
Objective To determine the dermoscopy features of NM.
Design Eighty-three cases of NM, 134 of invasive non-NM, 115 of nodular benign melanocytic tumors, and 135 of nodular nonmelanocytic tumors were scored for dermoscopy features using modified and previously described methods. Lesions were separated into amelanotic/hypomelanotic or pigmented to assess outcomes.
Setting Predominantly hospital-based clinics from 5 continents.
Main Outcome Measures Sensitivity, specificity, and odds ratios for features/models for the diagnosis of melanoma.
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