A tumor is simply a growth or swelling; it can be benign or malignant. In the skin, a tumor usually is identified on low power as an accumulation of cells or structures that are either in the wrong place or in the wrong pattern. The hardest “tumors” to identify in the skin are the malignant infiltrates (which are covered at the end of this section), although they could just as easily have been included under inflammatory conditions.
KeywordsBasal Cell Carcinoma Actinic Keratosis Glomus Tumor Melanocytic Nevus Pigment Lesion
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